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IP subnet calculator

Type an address with its prefix or mask to see the network, its usable range and masks. Split it into smaller subnets, or look up any prefix in the reference tables.

Network96.252.0.0/14
Usable hosts262,142
Subnet mask255.252.0.0
Addresses262,144
Network address
96.252.0.0
Broadcast address
96.255.255.255
First usable
96.252.0.1
Last usable
96.255.255.254
Usable hosts
262,142 (262,144 less the network and broadcast addresses)
Subnet mask
255.252.0.0
Wildcard mask
0.3.255.255 (Cisco ACLs, OSPF)
Prefix length
/14
Type
Public public
Old class
A (default /8)
As numbers
Hex 60FC0000 · Integer 1627127808 to 1627389951
Reverse DNS zones
252.96.in-addr.arpa
253.96.in-addr.arpa
254.96.in-addr.arpa
255.96.in-addr.arpa
/14 is not on a 8-bit boundary, so it takes 4 /16 zones.
Binary
Binary view
Binary (network bits bold, host bits grey)Dotted
Address01100000.11111100.00000000.0000000096.252.0.0
Subnet mask11111111.11111100.00000000.00000000255.252.0.0
Network01100000.11111100.00000000.0000000096.252.0.0
Broadcast01100000.11111111.11111111.1111111196.255.255.255
Split into smaller subnets/22
/15 (2)/16 (4)/17 (8)/18 (16)/19 (32)/20 (64)/21 (128)/22 (256)/23 (512)/24 (1,024)/25 (2,048)/26 (4,096)

96.252.0.0/14 makes 256 subnets of /22.

Subnets
#SubnetUsable hosts rangeBroadcastHosts
196.252.0.0/2296.252.0.1 to 96.252.3.25496.252.3.2551,022
296.252.4.0/2296.252.4.1 to 96.252.7.25496.252.7.2551,022
396.252.8.0/2296.252.8.1 to 96.252.11.25496.252.11.2551,022
496.252.12.0/2296.252.12.1 to 96.252.15.25496.252.15.2551,022
596.252.16.0/2296.252.16.1 to 96.252.19.25496.252.19.2551,022
696.252.20.0/2296.252.20.1 to 96.252.23.25496.252.23.2551,022
796.252.24.0/2296.252.24.1 to 96.252.27.25496.252.27.2551,022
896.252.28.0/2296.252.28.1 to 96.252.31.25496.252.31.2551,022
996.252.32.0/2296.252.32.1 to 96.252.35.25496.252.35.2551,022
1096.252.36.0/2296.252.36.1 to 96.252.39.25496.252.39.2551,022
1196.252.40.0/2296.252.40.1 to 96.252.43.25496.252.43.2551,022
1296.252.44.0/2296.252.44.1 to 96.252.47.25496.252.47.2551,022
1396.252.48.0/2296.252.48.1 to 96.252.51.25496.252.51.2551,022
1496.252.52.0/2296.252.52.1 to 96.252.55.25496.252.55.2551,022
1596.252.56.0/2296.252.56.1 to 96.252.59.25496.252.59.2551,022
1696.252.60.0/2296.252.60.1 to 96.252.63.25496.252.63.2551,022
1796.252.64.0/2296.252.64.1 to 96.252.67.25496.252.67.2551,022
1896.252.68.0/2296.252.68.1 to 96.252.71.25496.252.71.2551,022
1996.252.72.0/2296.252.72.1 to 96.252.75.25496.252.75.2551,022
2096.252.76.0/2296.252.76.1 to 96.252.79.25496.252.79.2551,022
2196.252.80.0/2296.252.80.1 to 96.252.83.25496.252.83.2551,022
2296.252.84.0/2296.252.84.1 to 96.252.87.25496.252.87.2551,022
2396.252.88.0/2296.252.88.1 to 96.252.91.25496.252.91.2551,022
2496.252.92.0/2296.252.92.1 to 96.252.95.25496.252.95.2551,022
2596.252.96.0/2296.252.96.1 to 96.252.99.25496.252.99.2551,022
2696.252.100.0/2296.252.100.1 to 96.252.103.25496.252.103.2551,022
2796.252.104.0/2296.252.104.1 to 96.252.107.25496.252.107.2551,022
2896.252.108.0/2296.252.108.1 to 96.252.111.25496.252.111.2551,022
2996.252.112.0/2296.252.112.1 to 96.252.115.25496.252.115.2551,022
3096.252.116.0/2296.252.116.1 to 96.252.119.25496.252.119.2551,022
3196.252.120.0/2296.252.120.1 to 96.252.123.25496.252.123.2551,022
3296.252.124.0/2296.252.124.1 to 96.252.127.25496.252.127.2551,022
3396.252.128.0/2296.252.128.1 to 96.252.131.25496.252.131.2551,022
3496.252.132.0/2296.252.132.1 to 96.252.135.25496.252.135.2551,022
3596.252.136.0/2296.252.136.1 to 96.252.139.25496.252.139.2551,022
3696.252.140.0/2296.252.140.1 to 96.252.143.25496.252.143.2551,022
3796.252.144.0/2296.252.144.1 to 96.252.147.25496.252.147.2551,022
3896.252.148.0/2296.252.148.1 to 96.252.151.25496.252.151.2551,022
3996.252.152.0/2296.252.152.1 to 96.252.155.25496.252.155.2551,022
4096.252.156.0/2296.252.156.1 to 96.252.159.25496.252.159.2551,022
4196.252.160.0/2296.252.160.1 to 96.252.163.25496.252.163.2551,022
4296.252.164.0/2296.252.164.1 to 96.252.167.25496.252.167.2551,022
4396.252.168.0/2296.252.168.1 to 96.252.171.25496.252.171.2551,022
4496.252.172.0/2296.252.172.1 to 96.252.175.25496.252.175.2551,022
4596.252.176.0/2296.252.176.1 to 96.252.179.25496.252.179.2551,022
4696.252.180.0/2296.252.180.1 to 96.252.183.25496.252.183.2551,022
4796.252.184.0/2296.252.184.1 to 96.252.187.25496.252.187.2551,022
4896.252.188.0/2296.252.188.1 to 96.252.191.25496.252.191.2551,022
4996.252.192.0/2296.252.192.1 to 96.252.195.25496.252.195.2551,022
5096.252.196.0/2296.252.196.1 to 96.252.199.25496.252.199.2551,022
5196.252.200.0/2296.252.200.1 to 96.252.203.25496.252.203.2551,022
5296.252.204.0/2296.252.204.1 to 96.252.207.25496.252.207.2551,022
5396.252.208.0/2296.252.208.1 to 96.252.211.25496.252.211.2551,022
5496.252.212.0/2296.252.212.1 to 96.252.215.25496.252.215.2551,022
5596.252.216.0/2296.252.216.1 to 96.252.219.25496.252.219.2551,022
5696.252.220.0/2296.252.220.1 to 96.252.223.25496.252.223.2551,022
5796.252.224.0/2296.252.224.1 to 96.252.227.25496.252.227.2551,022
5896.252.228.0/2296.252.228.1 to 96.252.231.25496.252.231.2551,022
5996.252.232.0/2296.252.232.1 to 96.252.235.25496.252.235.2551,022
6096.252.236.0/2296.252.236.1 to 96.252.239.25496.252.239.2551,022
6196.252.240.0/2296.252.240.1 to 96.252.243.25496.252.243.2551,022
6296.252.244.0/2296.252.244.1 to 96.252.247.25496.252.247.2551,022
6396.252.248.0/2296.252.248.1 to 96.252.251.25496.252.251.2551,022
6496.252.252.0/2296.252.252.1 to 96.252.255.25496.252.255.2551,022
6596.253.0.0/2296.253.0.1 to 96.253.3.25496.253.3.2551,022
6696.253.4.0/2296.253.4.1 to 96.253.7.25496.253.7.2551,022
6796.253.8.0/2296.253.8.1 to 96.253.11.25496.253.11.2551,022
6896.253.12.0/2296.253.12.1 to 96.253.15.25496.253.15.2551,022
6996.253.16.0/2296.253.16.1 to 96.253.19.25496.253.19.2551,022
7096.253.20.0/2296.253.20.1 to 96.253.23.25496.253.23.2551,022
7196.253.24.0/2296.253.24.1 to 96.253.27.25496.253.27.2551,022
7296.253.28.0/2296.253.28.1 to 96.253.31.25496.253.31.2551,022
7396.253.32.0/2296.253.32.1 to 96.253.35.25496.253.35.2551,022
7496.253.36.0/2296.253.36.1 to 96.253.39.25496.253.39.2551,022
7596.253.40.0/2296.253.40.1 to 96.253.43.25496.253.43.2551,022
7696.253.44.0/2296.253.44.1 to 96.253.47.25496.253.47.2551,022
7796.253.48.0/2296.253.48.1 to 96.253.51.25496.253.51.2551,022
7896.253.52.0/2296.253.52.1 to 96.253.55.25496.253.55.2551,022
7996.253.56.0/2296.253.56.1 to 96.253.59.25496.253.59.2551,022
8096.253.60.0/2296.253.60.1 to 96.253.63.25496.253.63.2551,022
8196.253.64.0/2296.253.64.1 to 96.253.67.25496.253.67.2551,022
8296.253.68.0/2296.253.68.1 to 96.253.71.25496.253.71.2551,022
8396.253.72.0/2296.253.72.1 to 96.253.75.25496.253.75.2551,022
8496.253.76.0/2296.253.76.1 to 96.253.79.25496.253.79.2551,022
8596.253.80.0/2296.253.80.1 to 96.253.83.25496.253.83.2551,022
8696.253.84.0/2296.253.84.1 to 96.253.87.25496.253.87.2551,022
8796.253.88.0/2296.253.88.1 to 96.253.91.25496.253.91.2551,022
8896.253.92.0/2296.253.92.1 to 96.253.95.25496.253.95.2551,022
8996.253.96.0/2296.253.96.1 to 96.253.99.25496.253.99.2551,022
9096.253.100.0/2296.253.100.1 to 96.253.103.25496.253.103.2551,022
9196.253.104.0/2296.253.104.1 to 96.253.107.25496.253.107.2551,022
9296.253.108.0/2296.253.108.1 to 96.253.111.25496.253.111.2551,022
9396.253.112.0/2296.253.112.1 to 96.253.115.25496.253.115.2551,022
9496.253.116.0/2296.253.116.1 to 96.253.119.25496.253.119.2551,022
9596.253.120.0/2296.253.120.1 to 96.253.123.25496.253.123.2551,022
9696.253.124.0/2296.253.124.1 to 96.253.127.25496.253.127.2551,022
9796.253.128.0/2296.253.128.1 to 96.253.131.25496.253.131.2551,022
9896.253.132.0/2296.253.132.1 to 96.253.135.25496.253.135.2551,022
9996.253.136.0/2296.253.136.1 to 96.253.139.25496.253.139.2551,022
10096.253.140.0/2296.253.140.1 to 96.253.143.25496.253.143.2551,022
10196.253.144.0/2296.253.144.1 to 96.253.147.25496.253.147.2551,022
10296.253.148.0/2296.253.148.1 to 96.253.151.25496.253.151.2551,022
10396.253.152.0/2296.253.152.1 to 96.253.155.25496.253.155.2551,022
10496.253.156.0/2296.253.156.1 to 96.253.159.25496.253.159.2551,022
10596.253.160.0/2296.253.160.1 to 96.253.163.25496.253.163.2551,022
10696.253.164.0/2296.253.164.1 to 96.253.167.25496.253.167.2551,022
10796.253.168.0/2296.253.168.1 to 96.253.171.25496.253.171.2551,022
10896.253.172.0/2296.253.172.1 to 96.253.175.25496.253.175.2551,022
10996.253.176.0/2296.253.176.1 to 96.253.179.25496.253.179.2551,022
11096.253.180.0/2296.253.180.1 to 96.253.183.25496.253.183.2551,022
11196.253.184.0/2296.253.184.1 to 96.253.187.25496.253.187.2551,022
11296.253.188.0/2296.253.188.1 to 96.253.191.25496.253.191.2551,022
11396.253.192.0/2296.253.192.1 to 96.253.195.25496.253.195.2551,022
11496.253.196.0/2296.253.196.1 to 96.253.199.25496.253.199.2551,022
11596.253.200.0/2296.253.200.1 to 96.253.203.25496.253.203.2551,022
11696.253.204.0/2296.253.204.1 to 96.253.207.25496.253.207.2551,022
11796.253.208.0/2296.253.208.1 to 96.253.211.25496.253.211.2551,022
11896.253.212.0/2296.253.212.1 to 96.253.215.25496.253.215.2551,022
11996.253.216.0/2296.253.216.1 to 96.253.219.25496.253.219.2551,022
12096.253.220.0/2296.253.220.1 to 96.253.223.25496.253.223.2551,022
12196.253.224.0/2296.253.224.1 to 96.253.227.25496.253.227.2551,022
12296.253.228.0/2296.253.228.1 to 96.253.231.25496.253.231.2551,022
12396.253.232.0/2296.253.232.1 to 96.253.235.25496.253.235.2551,022
12496.253.236.0/2296.253.236.1 to 96.253.239.25496.253.239.2551,022
12596.253.240.0/2296.253.240.1 to 96.253.243.25496.253.243.2551,022
12696.253.244.0/2296.253.244.1 to 96.253.247.25496.253.247.2551,022
12796.253.248.0/2296.253.248.1 to 96.253.251.25496.253.251.2551,022
12896.253.252.0/2296.253.252.1 to 96.253.255.25496.253.255.2551,022
12996.254.0.0/2296.254.0.1 to 96.254.3.25496.254.3.2551,022
13096.254.4.0/2296.254.4.1 to 96.254.7.25496.254.7.2551,022
13196.254.8.0/2296.254.8.1 to 96.254.11.25496.254.11.2551,022
13296.254.12.0/2296.254.12.1 to 96.254.15.25496.254.15.2551,022
13396.254.16.0/2296.254.16.1 to 96.254.19.25496.254.19.2551,022
13496.254.20.0/2296.254.20.1 to 96.254.23.25496.254.23.2551,022
13596.254.24.0/2296.254.24.1 to 96.254.27.25496.254.27.2551,022
13696.254.28.0/2296.254.28.1 to 96.254.31.25496.254.31.2551,022
13796.254.32.0/2296.254.32.1 to 96.254.35.25496.254.35.2551,022
13896.254.36.0/2296.254.36.1 to 96.254.39.25496.254.39.2551,022
13996.254.40.0/2296.254.40.1 to 96.254.43.25496.254.43.2551,022
14096.254.44.0/2296.254.44.1 to 96.254.47.25496.254.47.2551,022
14196.254.48.0/2296.254.48.1 to 96.254.51.25496.254.51.2551,022
14296.254.52.0/2296.254.52.1 to 96.254.55.25496.254.55.2551,022
14396.254.56.0/2296.254.56.1 to 96.254.59.25496.254.59.2551,022
14496.254.60.0/2296.254.60.1 to 96.254.63.25496.254.63.2551,022
14596.254.64.0/2296.254.64.1 to 96.254.67.25496.254.67.2551,022
14696.254.68.0/2296.254.68.1 to 96.254.71.25496.254.71.2551,022
14796.254.72.0/2296.254.72.1 to 96.254.75.25496.254.75.2551,022
14896.254.76.0/2296.254.76.1 to 96.254.79.25496.254.79.2551,022
14996.254.80.0/2296.254.80.1 to 96.254.83.25496.254.83.2551,022
15096.254.84.0/2296.254.84.1 to 96.254.87.25496.254.87.2551,022
15196.254.88.0/2296.254.88.1 to 96.254.91.25496.254.91.2551,022
15296.254.92.0/2296.254.92.1 to 96.254.95.25496.254.95.2551,022
15396.254.96.0/2296.254.96.1 to 96.254.99.25496.254.99.2551,022
15496.254.100.0/2296.254.100.1 to 96.254.103.25496.254.103.2551,022
15596.254.104.0/2296.254.104.1 to 96.254.107.25496.254.107.2551,022
15696.254.108.0/2296.254.108.1 to 96.254.111.25496.254.111.2551,022
15796.254.112.0/2296.254.112.1 to 96.254.115.25496.254.115.2551,022
15896.254.116.0/2296.254.116.1 to 96.254.119.25496.254.119.2551,022
15996.254.120.0/2296.254.120.1 to 96.254.123.25496.254.123.2551,022
16096.254.124.0/2296.254.124.1 to 96.254.127.25496.254.127.2551,022
16196.254.128.0/2296.254.128.1 to 96.254.131.25496.254.131.2551,022
16296.254.132.0/2296.254.132.1 to 96.254.135.25496.254.135.2551,022
16396.254.136.0/2296.254.136.1 to 96.254.139.25496.254.139.2551,022
16496.254.140.0/2296.254.140.1 to 96.254.143.25496.254.143.2551,022
16596.254.144.0/2296.254.144.1 to 96.254.147.25496.254.147.2551,022
16696.254.148.0/2296.254.148.1 to 96.254.151.25496.254.151.2551,022
16796.254.152.0/2296.254.152.1 to 96.254.155.25496.254.155.2551,022
16896.254.156.0/2296.254.156.1 to 96.254.159.25496.254.159.2551,022
16996.254.160.0/2296.254.160.1 to 96.254.163.25496.254.163.2551,022
17096.254.164.0/2296.254.164.1 to 96.254.167.25496.254.167.2551,022
17196.254.168.0/2296.254.168.1 to 96.254.171.25496.254.171.2551,022
17296.254.172.0/2296.254.172.1 to 96.254.175.25496.254.175.2551,022
17396.254.176.0/2296.254.176.1 to 96.254.179.25496.254.179.2551,022
17496.254.180.0/2296.254.180.1 to 96.254.183.25496.254.183.2551,022
17596.254.184.0/2296.254.184.1 to 96.254.187.25496.254.187.2551,022
17696.254.188.0/2296.254.188.1 to 96.254.191.25496.254.191.2551,022
17796.254.192.0/2296.254.192.1 to 96.254.195.25496.254.195.2551,022
17896.254.196.0/2296.254.196.1 to 96.254.199.25496.254.199.2551,022
17996.254.200.0/2296.254.200.1 to 96.254.203.25496.254.203.2551,022
18096.254.204.0/2296.254.204.1 to 96.254.207.25496.254.207.2551,022
18196.254.208.0/2296.254.208.1 to 96.254.211.25496.254.211.2551,022
18296.254.212.0/2296.254.212.1 to 96.254.215.25496.254.215.2551,022
18396.254.216.0/2296.254.216.1 to 96.254.219.25496.254.219.2551,022
18496.254.220.0/2296.254.220.1 to 96.254.223.25496.254.223.2551,022
18596.254.224.0/2296.254.224.1 to 96.254.227.25496.254.227.2551,022
18696.254.228.0/2296.254.228.1 to 96.254.231.25496.254.231.2551,022
18796.254.232.0/2296.254.232.1 to 96.254.235.25496.254.235.2551,022
18896.254.236.0/2296.254.236.1 to 96.254.239.25496.254.239.2551,022
18996.254.240.0/2296.254.240.1 to 96.254.243.25496.254.243.2551,022
19096.254.244.0/2296.254.244.1 to 96.254.247.25496.254.247.2551,022
19196.254.248.0/2296.254.248.1 to 96.254.251.25496.254.251.2551,022
19296.254.252.0/2296.254.252.1 to 96.254.255.25496.254.255.2551,022
19396.255.0.0/2296.255.0.1 to 96.255.3.25496.255.3.2551,022
19496.255.4.0/2296.255.4.1 to 96.255.7.25496.255.7.2551,022
19596.255.8.0/2296.255.8.1 to 96.255.11.25496.255.11.2551,022
19696.255.12.0/2296.255.12.1 to 96.255.15.25496.255.15.2551,022
19796.255.16.0/2296.255.16.1 to 96.255.19.25496.255.19.2551,022
19896.255.20.0/2296.255.20.1 to 96.255.23.25496.255.23.2551,022
19996.255.24.0/2296.255.24.1 to 96.255.27.25496.255.27.2551,022
20096.255.28.0/2296.255.28.1 to 96.255.31.25496.255.31.2551,022
20196.255.32.0/2296.255.32.1 to 96.255.35.25496.255.35.2551,022
20296.255.36.0/2296.255.36.1 to 96.255.39.25496.255.39.2551,022
20396.255.40.0/2296.255.40.1 to 96.255.43.25496.255.43.2551,022
20496.255.44.0/2296.255.44.1 to 96.255.47.25496.255.47.2551,022
20596.255.48.0/2296.255.48.1 to 96.255.51.25496.255.51.2551,022
20696.255.52.0/2296.255.52.1 to 96.255.55.25496.255.55.2551,022
20796.255.56.0/2296.255.56.1 to 96.255.59.25496.255.59.2551,022
20896.255.60.0/2296.255.60.1 to 96.255.63.25496.255.63.2551,022
20996.255.64.0/2296.255.64.1 to 96.255.67.25496.255.67.2551,022
21096.255.68.0/2296.255.68.1 to 96.255.71.25496.255.71.2551,022
21196.255.72.0/2296.255.72.1 to 96.255.75.25496.255.75.2551,022
21296.255.76.0/2296.255.76.1 to 96.255.79.25496.255.79.2551,022
21396.255.80.0/2296.255.80.1 to 96.255.83.25496.255.83.2551,022
21496.255.84.0/2296.255.84.1 to 96.255.87.25496.255.87.2551,022
21596.255.88.0/2296.255.88.1 to 96.255.91.25496.255.91.2551,022
21696.255.92.0/2296.255.92.1 to 96.255.95.25496.255.95.2551,022
21796.255.96.0/2296.255.96.1 to 96.255.99.25496.255.99.2551,022
21896.255.100.0/2296.255.100.1 to 96.255.103.25496.255.103.2551,022
21996.255.104.0/2296.255.104.1 to 96.255.107.25496.255.107.2551,022
22096.255.108.0/2296.255.108.1 to 96.255.111.25496.255.111.2551,022
22196.255.112.0/2296.255.112.1 to 96.255.115.25496.255.115.2551,022
22296.255.116.0/2296.255.116.1 to 96.255.119.25496.255.119.2551,022
22396.255.120.0/2296.255.120.1 to 96.255.123.25496.255.123.2551,022
22496.255.124.0/2296.255.124.1 to 96.255.127.25496.255.127.2551,022
22596.255.128.0/2296.255.128.1 to 96.255.131.25496.255.131.2551,022
22696.255.132.0/2296.255.132.1 to 96.255.135.25496.255.135.2551,022
22796.255.136.0/2296.255.136.1 to 96.255.139.25496.255.139.2551,022
22896.255.140.0/2296.255.140.1 to 96.255.143.25496.255.143.2551,022
22996.255.144.0/2296.255.144.1 to 96.255.147.25496.255.147.2551,022
23096.255.148.0/2296.255.148.1 to 96.255.151.25496.255.151.2551,022
23196.255.152.0/2296.255.152.1 to 96.255.155.25496.255.155.2551,022
23296.255.156.0/2296.255.156.1 to 96.255.159.25496.255.159.2551,022
23396.255.160.0/2296.255.160.1 to 96.255.163.25496.255.163.2551,022
23496.255.164.0/2296.255.164.1 to 96.255.167.25496.255.167.2551,022
23596.255.168.0/2296.255.168.1 to 96.255.171.25496.255.171.2551,022
23696.255.172.0/2296.255.172.1 to 96.255.175.25496.255.175.2551,022
23796.255.176.0/2296.255.176.1 to 96.255.179.25496.255.179.2551,022
23896.255.180.0/2296.255.180.1 to 96.255.183.25496.255.183.2551,022
23996.255.184.0/2296.255.184.1 to 96.255.187.25496.255.187.2551,022
24096.255.188.0/2296.255.188.1 to 96.255.191.25496.255.191.2551,022
24196.255.192.0/2296.255.192.1 to 96.255.195.25496.255.195.2551,022
24296.255.196.0/2296.255.196.1 to 96.255.199.25496.255.199.2551,022
24396.255.200.0/2296.255.200.1 to 96.255.203.25496.255.203.2551,022
24496.255.204.0/2296.255.204.1 to 96.255.207.25496.255.207.2551,022
24596.255.208.0/2296.255.208.1 to 96.255.211.25496.255.211.2551,022
24696.255.212.0/2296.255.212.1 to 96.255.215.25496.255.215.2551,022
24796.255.216.0/2296.255.216.1 to 96.255.219.25496.255.219.2551,022
24896.255.220.0/2296.255.220.1 to 96.255.223.25496.255.223.2551,022
24996.255.224.0/2296.255.224.1 to 96.255.227.25496.255.227.2551,022
25096.255.228.0/2296.255.228.1 to 96.255.231.25496.255.231.2551,022
25196.255.232.0/2296.255.232.1 to 96.255.235.25496.255.235.2551,022
25296.255.236.0/2296.255.236.1 to 96.255.239.25496.255.239.2551,022
25396.255.240.0/2296.255.240.1 to 96.255.243.25496.255.243.2551,022
25496.255.244.0/2296.255.244.1 to 96.255.247.25496.255.247.2551,022
25596.255.248.0/2296.255.248.1 to 96.255.251.25496.255.251.2551,022
25696.255.252.0/2296.255.252.1 to 96.255.255.25496.255.255.2551,022

IPv4 CIDR reference (/0 to /32)

IPv4 prefix lengths
PrefixSubnet maskWildcardAddressesUsable hostsSizeTypical use
/00.0.0.0255.255.255.2554,294,967,2964,294,967,29416,777,216 × /24
/1128.0.0.0127.255.255.2552,147,483,6482,147,483,6468,388,608 × /24
/2192.0.0.063.255.255.2551,073,741,8241,073,741,8224,194,304 × /24
/3224.0.0.031.255.255.255536,870,912536,870,9102,097,152 × /24
/4240.0.0.015.255.255.255268,435,456268,435,4541,048,576 × /24
/5248.0.0.07.255.255.255134,217,728134,217,726524,288 × /24
/6252.0.0.03.255.255.25567,108,86467,108,862262,144 × /24
/7254.0.0.01.255.255.25533,554,43233,554,430131,072 × /24
/8255.0.0.00.255.255.25516,777,21616,777,21465,536 × /24Old class A; 10.0.0.0/8
/9255.128.0.00.127.255.2558,388,6088,388,60632,768 × /24
/10255.192.0.00.63.255.2554,194,3044,194,30216,384 × /24
/11255.224.0.00.31.255.2552,097,1522,097,1508,192 × /24
/12255.240.0.00.15.255.2551,048,5761,048,5744,096 × /24172.16.0.0/12
/13255.248.0.00.7.255.255524,288524,2862,048 × /24
/14255.252.0.00.3.255.255262,144262,1421,024 × /24
/15255.254.0.00.1.255.255131,072131,070512 × /24
/16255.255.0.00.0.255.25565,53665,534256 × /24Old class B; 192.168.0.0/16
/17255.255.128.00.0.127.25532,76832,766128 × /24
/18255.255.192.00.0.63.25516,38416,38264 × /24
/19255.255.224.00.0.31.2558,1928,19032 × /24
/20255.255.240.00.0.15.2554,0964,09416 × /24
/21255.255.248.00.0.7.2552,0482,0468 × /24
/22255.255.252.00.0.3.2551,0241,0224 × /24Large office or guest Wi-Fi (1,022 hosts)
/23255.255.254.00.0.1.2555125102 × /24Larger office LAN (510 hosts)
/24255.255.255.00.0.0.2552562541 × /24Typical office LAN (old class C)
/25255.255.255.1280.0.0.1271281261/2 of a /24Smaller LAN or VLAN
/26255.255.255.1920.0.0.6364621/4 of a /24Smaller LAN or VLAN
/27255.255.255.2240.0.0.3132301/8 of a /24Small VLAN, phones, cameras
/28255.255.255.2400.0.0.1516141/16 of a /24Small VLAN, phones, cameras
/29255.255.255.2480.0.0.7861/32 of a /24Small fixed public block (5 usable)
/30255.255.255.2520.0.0.3421/64 of a /24Point-to-point (old style)
/31255.255.255.2540.0.0.1221/128 of a /24Point-to-point link (RFC 3021)
/32255.255.255.2550.0.0.0111/256 of a /24One host

IPv6 prefix reference

IPv6 prefix lengths
PrefixAddresses/64 LANs/48 sitesNibbleTypical use
/342,535,295,865,117,307,932,921,825,928,971,026,432 (2^125)2,305,843,009,213,693,95235,184,372,088,832NoAll global unicast (2000::/3)
/165,192,296,858,534,827,628,530,496,329,220,096 (2^112)281,474,976,710,6564,294,967,296Yes
/20324,518,553,658,426,726,783,156,020,576,256 (2^108)17,592,186,044,416268,435,456YesLarge provider allocation (RIPE minimum for some)
/29633,825,300,114,114,700,748,351,602,688 (2^99)34,359,738,368524,288NoRIPE allocation to a provider (often)
/3279,228,162,514,264,337,593,543,950,336 (2^96)4,294,967,29665,536YesProvider allocation (RIPE default)
/364,951,760,157,141,521,099,596,496,896 (2^92)268,435,4564,096Yes
/40309,485,009,821,345,068,724,781,056 (2^88)16,777,216256Yes
/4419,342,813,113,834,066,795,298,816 (2^84)1,048,57616Yes
/481,208,925,819,614,629,174,706,176 (2^80)65,5361YesOne site or organisation (RIPE PI / assignment)
/5275,557,863,725,914,323,419,136 (2^76)4,096Yes
/564,722,366,482,869,645,213,696 (2^72)256YesSmall site or home (common provider assignment)
/60295,147,905,179,352,825,856 (2^68)16YesSome home broadband (16 LANs)
/6418,446,744,073,709,551,616 (2^64)1YesOne LAN or VLAN (needed for SLAAC)
/7272,057,594,037,927,936 (2^56)1/256 of a /64Yes
/80281,474,976,710,656 (2^48)1/65,536 of a /64Yes
/964,294,967,2961/4,294,967,296 of a /64YesEmbeds an IPv4 address (NAT64)
/11265,5361/281,474,976,710,656 of a /64Yes
/1202561/72,057,594,037,927,936 of a /64Yes
/124161/1,152,921,504,606,846,976 of a /64Yes
/12641/4,611,686,018,427,387,904 of a /64No
/12721/9,223,372,036,854,775,808 of a /64NoPoint-to-point link (RFC 6164)
/12811/18,446,744,073,709,551,616 of a /64YesOne host or loopback

Private and special ranges

IPv4

Special-purpose ranges
RangeNameWhat it is
255.255.255.255/32Limited broadcastEvery host on the local network
0.0.0.0/8This networkNot routed; 0.0.0.0 means "any address" in settings
10.0.0.0/8Private (RFC 1918)Office and home networks; not routed on the internet
100.64.0.0/10Shared address space (CGNAT)Used by providers behind carrier-grade NAT (RFC 6598)
127.0.0.0/8LoopbackThis computer
169.254.0.0/16Link-local (APIPA)Self-assigned when no DHCP server answers
172.16.0.0/12Private (RFC 1918)Office and home networks; not routed on the internet
192.0.0.0/24IETF protocol assignmentsSpecial uses such as DS-Lite
192.0.2.0/24Documentation (TEST-NET-1)For examples; never used on a network
192.88.99.0/246to4 relay (deprecated)Formerly anycast for 6to4
192.168.0.0/16Private (RFC 1918)Office and home networks; not routed on the internet
198.18.0.0/15BenchmarkingNetwork equipment testing (RFC 2544)
198.51.100.0/24Documentation (TEST-NET-2)For examples; never used on a network
203.0.113.0/24Documentation (TEST-NET-3)For examples; never used on a network
224.0.0.0/4MulticastOne-to-many traffic, such as IPTV and routing protocols
240.0.0.0/4ReservedFuture use; not usable on most systems

IPv6

Special-purpose ranges
RangeNameWhat it is
::/128UnspecifiedNo address; :: means "any address" in settings
::1/128LoopbackThis computer
::ffff:0:0/96IPv4-mappedAn IPv4 address written as IPv6
64:ff9b::/96NAT64IPv4 addresses reached through a NAT64 gateway
100::/64Discard onlyTraffic sent here is dropped (RFC 6666)
2001:db8::/32DocumentationFor examples; never used on a network
2001::/32TeredoIPv6 tunnelled over IPv4 UDP
2002::/166to4IPv6 tunnelled over IPv4 (largely retired)
3fff::/20DocumentationFor examples (RFC 9637)
fc00::/7Unique local (ULA)Private IPv6, like RFC 1918; usually fd00::/8
fe80::/10Link-localEvery IPv6 interface has one; not routed
ff00::/8MulticastOne-to-many traffic; replaces broadcast
2000::/3Global unicastPublic internet addresses

About this tool

A network is written as an address and a prefix length, such as 192.168.1.0/24: the first 24 bits name the network and the rest number the devices on it. The calculator works out where the network starts and ends, how many devices it holds, its subnet and wildcard masks, and the reverse DNS zone to ask your provider for.

It also splits a network into equal smaller ones (one per VLAN or site), turns a range of addresses into the fewest CIDR blocks for a firewall rule, and lists every IPv4 prefix length and the common IPv6 ones in reference tables.

Common questions

Why are two addresses lost in every IPv4 subnet?

The first address names the network and the last is the broadcast address, so a /24 has 256 addresses but 254 for devices. A /31 (a link between two routers) and a /32 (one host) are the exceptions.

What size of IPv6 network should a LAN use?

Always /64. Devices pick their own address within it (SLAAC), which needs the full 64 bits. A site usually gets a /48 or /56 from its provider, which holds 65,536 or 256 LANs.

What is a wildcard mask?

The subnet mask turned inside out: 255.255.255.0 becomes 0.0.0.255. Cisco access lists and OSPF use it to say which bits must match.

Which ranges can I use inside an office?

IPv4: 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. IPv6: unique local addresses from fd00::/8, though most networks use the public prefix from their provider.