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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.

Prefix/16
Addresses2^112
/64 networks2^48
Network
2ae2::/16
First address
2ae2::
Last address
2ae2:ffff:ffff:ffff:ffff:ffff:ffff:ffff
Addresses
5,192,296,858,534,827,628,530,496,329,220,096 (2^112)
/64 networks (LANs)
281,474,976,710,656 (2^48)
Full form
2ae2:0000:0000:0000:0000:0000:0000:0000
Type
Global unicast 2000::/3
Public internet addresses
Reverse DNS zone
2.e.a.2.ip6.arpa
Split into smaller subnets/28
/17 (2)/18 (4)/19 (8)/20 (16)/24 (256)/28 (4,096)/32 (65,536)

2ae2::/16 makes 4,096 subnets of /28; the first 256 are listed.

Subnets
#SubnetLast address
12ae2::/282ae2:f:ffff:ffff:ffff:ffff:ffff:ffff
22ae2:10::/282ae2:1f:ffff:ffff:ffff:ffff:ffff:ffff
32ae2:20::/282ae2:2f:ffff:ffff:ffff:ffff:ffff:ffff
42ae2:30::/282ae2:3f:ffff:ffff:ffff:ffff:ffff:ffff
52ae2:40::/282ae2:4f:ffff:ffff:ffff:ffff:ffff:ffff
62ae2:50::/282ae2:5f:ffff:ffff:ffff:ffff:ffff:ffff
72ae2:60::/282ae2:6f:ffff:ffff:ffff:ffff:ffff:ffff
82ae2:70::/282ae2:7f:ffff:ffff:ffff:ffff:ffff:ffff
92ae2:80::/282ae2:8f:ffff:ffff:ffff:ffff:ffff:ffff
102ae2:90::/282ae2:9f:ffff:ffff:ffff:ffff:ffff:ffff
112ae2:a0::/282ae2:af:ffff:ffff:ffff:ffff:ffff:ffff
122ae2:b0::/282ae2:bf:ffff:ffff:ffff:ffff:ffff:ffff
132ae2:c0::/282ae2:cf:ffff:ffff:ffff:ffff:ffff:ffff
142ae2:d0::/282ae2:df:ffff:ffff:ffff:ffff:ffff:ffff
152ae2:e0::/282ae2:ef:ffff:ffff:ffff:ffff:ffff:ffff
162ae2:f0::/282ae2:ff:ffff:ffff:ffff:ffff:ffff:ffff
172ae2:100::/282ae2:10f:ffff:ffff:ffff:ffff:ffff:ffff
182ae2:110::/282ae2:11f:ffff:ffff:ffff:ffff:ffff:ffff
192ae2:120::/282ae2:12f:ffff:ffff:ffff:ffff:ffff:ffff
202ae2:130::/282ae2:13f:ffff:ffff:ffff:ffff:ffff:ffff
212ae2:140::/282ae2:14f:ffff:ffff:ffff:ffff:ffff:ffff
222ae2:150::/282ae2:15f:ffff:ffff:ffff:ffff:ffff:ffff
232ae2:160::/282ae2:16f:ffff:ffff:ffff:ffff:ffff:ffff
242ae2:170::/282ae2:17f:ffff:ffff:ffff:ffff:ffff:ffff
252ae2:180::/282ae2:18f:ffff:ffff:ffff:ffff:ffff:ffff
262ae2:190::/282ae2:19f:ffff:ffff:ffff:ffff:ffff:ffff
272ae2:1a0::/282ae2:1af:ffff:ffff:ffff:ffff:ffff:ffff
282ae2:1b0::/282ae2:1bf:ffff:ffff:ffff:ffff:ffff:ffff
292ae2:1c0::/282ae2:1cf:ffff:ffff:ffff:ffff:ffff:ffff
302ae2:1d0::/282ae2:1df:ffff:ffff:ffff:ffff:ffff:ffff
312ae2:1e0::/282ae2:1ef:ffff:ffff:ffff:ffff:ffff:ffff
322ae2:1f0::/282ae2:1ff:ffff:ffff:ffff:ffff:ffff:ffff
332ae2:200::/282ae2:20f:ffff:ffff:ffff:ffff:ffff:ffff
342ae2:210::/282ae2:21f:ffff:ffff:ffff:ffff:ffff:ffff
352ae2:220::/282ae2:22f:ffff:ffff:ffff:ffff:ffff:ffff
362ae2:230::/282ae2:23f:ffff:ffff:ffff:ffff:ffff:ffff
372ae2:240::/282ae2:24f:ffff:ffff:ffff:ffff:ffff:ffff
382ae2:250::/282ae2:25f:ffff:ffff:ffff:ffff:ffff:ffff
392ae2:260::/282ae2:26f:ffff:ffff:ffff:ffff:ffff:ffff
402ae2:270::/282ae2:27f:ffff:ffff:ffff:ffff:ffff:ffff
412ae2:280::/282ae2:28f:ffff:ffff:ffff:ffff:ffff:ffff
422ae2:290::/282ae2:29f:ffff:ffff:ffff:ffff:ffff:ffff
432ae2:2a0::/282ae2:2af:ffff:ffff:ffff:ffff:ffff:ffff
442ae2:2b0::/282ae2:2bf:ffff:ffff:ffff:ffff:ffff:ffff
452ae2:2c0::/282ae2:2cf:ffff:ffff:ffff:ffff:ffff:ffff
462ae2:2d0::/282ae2:2df:ffff:ffff:ffff:ffff:ffff:ffff
472ae2:2e0::/282ae2:2ef:ffff:ffff:ffff:ffff:ffff:ffff
482ae2:2f0::/282ae2:2ff:ffff:ffff:ffff:ffff:ffff:ffff
492ae2:300::/282ae2:30f:ffff:ffff:ffff:ffff:ffff:ffff
502ae2:310::/282ae2:31f:ffff:ffff:ffff:ffff:ffff:ffff
512ae2:320::/282ae2:32f:ffff:ffff:ffff:ffff:ffff:ffff
522ae2:330::/282ae2:33f:ffff:ffff:ffff:ffff:ffff:ffff
532ae2:340::/282ae2:34f:ffff:ffff:ffff:ffff:ffff:ffff
542ae2:350::/282ae2:35f:ffff:ffff:ffff:ffff:ffff:ffff
552ae2:360::/282ae2:36f:ffff:ffff:ffff:ffff:ffff:ffff
562ae2:370::/282ae2:37f:ffff:ffff:ffff:ffff:ffff:ffff
572ae2:380::/282ae2:38f:ffff:ffff:ffff:ffff:ffff:ffff
582ae2:390::/282ae2:39f:ffff:ffff:ffff:ffff:ffff:ffff
592ae2:3a0::/282ae2:3af:ffff:ffff:ffff:ffff:ffff:ffff
602ae2:3b0::/282ae2:3bf:ffff:ffff:ffff:ffff:ffff:ffff
612ae2:3c0::/282ae2:3cf:ffff:ffff:ffff:ffff:ffff:ffff
622ae2:3d0::/282ae2:3df:ffff:ffff:ffff:ffff:ffff:ffff
632ae2:3e0::/282ae2:3ef:ffff:ffff:ffff:ffff:ffff:ffff
642ae2:3f0::/282ae2:3ff:ffff:ffff:ffff:ffff:ffff:ffff
652ae2:400::/282ae2:40f:ffff:ffff:ffff:ffff:ffff:ffff
662ae2:410::/282ae2:41f:ffff:ffff:ffff:ffff:ffff:ffff
672ae2:420::/282ae2:42f:ffff:ffff:ffff:ffff:ffff:ffff
682ae2:430::/282ae2:43f:ffff:ffff:ffff:ffff:ffff:ffff
692ae2:440::/282ae2:44f:ffff:ffff:ffff:ffff:ffff:ffff
702ae2:450::/282ae2:45f:ffff:ffff:ffff:ffff:ffff:ffff
712ae2:460::/282ae2:46f:ffff:ffff:ffff:ffff:ffff:ffff
722ae2:470::/282ae2:47f:ffff:ffff:ffff:ffff:ffff:ffff
732ae2:480::/282ae2:48f:ffff:ffff:ffff:ffff:ffff:ffff
742ae2:490::/282ae2:49f:ffff:ffff:ffff:ffff:ffff:ffff
752ae2:4a0::/282ae2:4af:ffff:ffff:ffff:ffff:ffff:ffff
762ae2:4b0::/282ae2:4bf:ffff:ffff:ffff:ffff:ffff:ffff
772ae2:4c0::/282ae2:4cf:ffff:ffff:ffff:ffff:ffff:ffff
782ae2:4d0::/282ae2:4df:ffff:ffff:ffff:ffff:ffff:ffff
792ae2:4e0::/282ae2:4ef:ffff:ffff:ffff:ffff:ffff:ffff
802ae2:4f0::/282ae2:4ff:ffff:ffff:ffff:ffff:ffff:ffff
812ae2:500::/282ae2:50f:ffff:ffff:ffff:ffff:ffff:ffff
822ae2:510::/282ae2:51f:ffff:ffff:ffff:ffff:ffff:ffff
832ae2:520::/282ae2:52f:ffff:ffff:ffff:ffff:ffff:ffff
842ae2:530::/282ae2:53f:ffff:ffff:ffff:ffff:ffff:ffff
852ae2:540::/282ae2:54f:ffff:ffff:ffff:ffff:ffff:ffff
862ae2:550::/282ae2:55f:ffff:ffff:ffff:ffff:ffff:ffff
872ae2:560::/282ae2:56f:ffff:ffff:ffff:ffff:ffff:ffff
882ae2:570::/282ae2:57f:ffff:ffff:ffff:ffff:ffff:ffff
892ae2:580::/282ae2:58f:ffff:ffff:ffff:ffff:ffff:ffff
902ae2:590::/282ae2:59f:ffff:ffff:ffff:ffff:ffff:ffff
912ae2:5a0::/282ae2:5af:ffff:ffff:ffff:ffff:ffff:ffff
922ae2:5b0::/282ae2:5bf:ffff:ffff:ffff:ffff:ffff:ffff
932ae2:5c0::/282ae2:5cf:ffff:ffff:ffff:ffff:ffff:ffff
942ae2:5d0::/282ae2:5df:ffff:ffff:ffff:ffff:ffff:ffff
952ae2:5e0::/282ae2:5ef:ffff:ffff:ffff:ffff:ffff:ffff
962ae2:5f0::/282ae2:5ff:ffff:ffff:ffff:ffff:ffff:ffff
972ae2:600::/282ae2:60f:ffff:ffff:ffff:ffff:ffff:ffff
982ae2:610::/282ae2:61f:ffff:ffff:ffff:ffff:ffff:ffff
992ae2:620::/282ae2:62f:ffff:ffff:ffff:ffff:ffff:ffff
1002ae2:630::/282ae2:63f:ffff:ffff:ffff:ffff:ffff:ffff
1012ae2:640::/282ae2:64f:ffff:ffff:ffff:ffff:ffff:ffff
1022ae2:650::/282ae2:65f:ffff:ffff:ffff:ffff:ffff:ffff
1032ae2:660::/282ae2:66f:ffff:ffff:ffff:ffff:ffff:ffff
1042ae2:670::/282ae2:67f:ffff:ffff:ffff:ffff:ffff:ffff
1052ae2:680::/282ae2:68f:ffff:ffff:ffff:ffff:ffff:ffff
1062ae2:690::/282ae2:69f:ffff:ffff:ffff:ffff:ffff:ffff
1072ae2:6a0::/282ae2:6af:ffff:ffff:ffff:ffff:ffff:ffff
1082ae2:6b0::/282ae2:6bf:ffff:ffff:ffff:ffff:ffff:ffff
1092ae2:6c0::/282ae2:6cf:ffff:ffff:ffff:ffff:ffff:ffff
1102ae2:6d0::/282ae2:6df:ffff:ffff:ffff:ffff:ffff:ffff
1112ae2:6e0::/282ae2:6ef:ffff:ffff:ffff:ffff:ffff:ffff
1122ae2:6f0::/282ae2:6ff:ffff:ffff:ffff:ffff:ffff:ffff
1132ae2:700::/282ae2:70f:ffff:ffff:ffff:ffff:ffff:ffff
1142ae2:710::/282ae2:71f:ffff:ffff:ffff:ffff:ffff:ffff
1152ae2:720::/282ae2:72f:ffff:ffff:ffff:ffff:ffff:ffff
1162ae2:730::/282ae2:73f:ffff:ffff:ffff:ffff:ffff:ffff
1172ae2:740::/282ae2:74f:ffff:ffff:ffff:ffff:ffff:ffff
1182ae2:750::/282ae2:75f:ffff:ffff:ffff:ffff:ffff:ffff
1192ae2:760::/282ae2:76f:ffff:ffff:ffff:ffff:ffff:ffff
1202ae2:770::/282ae2:77f:ffff:ffff:ffff:ffff:ffff:ffff
1212ae2:780::/282ae2:78f:ffff:ffff:ffff:ffff:ffff:ffff
1222ae2:790::/282ae2:79f:ffff:ffff:ffff:ffff:ffff:ffff
1232ae2:7a0::/282ae2:7af:ffff:ffff:ffff:ffff:ffff:ffff
1242ae2:7b0::/282ae2:7bf:ffff:ffff:ffff:ffff:ffff:ffff
1252ae2:7c0::/282ae2:7cf:ffff:ffff:ffff:ffff:ffff:ffff
1262ae2:7d0::/282ae2:7df:ffff:ffff:ffff:ffff:ffff:ffff
1272ae2:7e0::/282ae2:7ef:ffff:ffff:ffff:ffff:ffff:ffff
1282ae2:7f0::/282ae2:7ff:ffff:ffff:ffff:ffff:ffff:ffff
1292ae2:800::/282ae2:80f:ffff:ffff:ffff:ffff:ffff:ffff
1302ae2:810::/282ae2:81f:ffff:ffff:ffff:ffff:ffff:ffff
1312ae2:820::/282ae2:82f:ffff:ffff:ffff:ffff:ffff:ffff
1322ae2:830::/282ae2:83f:ffff:ffff:ffff:ffff:ffff:ffff
1332ae2:840::/282ae2:84f:ffff:ffff:ffff:ffff:ffff:ffff
1342ae2:850::/282ae2:85f:ffff:ffff:ffff:ffff:ffff:ffff
1352ae2:860::/282ae2:86f:ffff:ffff:ffff:ffff:ffff:ffff
1362ae2:870::/282ae2:87f:ffff:ffff:ffff:ffff:ffff:ffff
1372ae2:880::/282ae2:88f:ffff:ffff:ffff:ffff:ffff:ffff
1382ae2:890::/282ae2:89f:ffff:ffff:ffff:ffff:ffff:ffff
1392ae2:8a0::/282ae2:8af:ffff:ffff:ffff:ffff:ffff:ffff
1402ae2:8b0::/282ae2:8bf:ffff:ffff:ffff:ffff:ffff:ffff
1412ae2:8c0::/282ae2:8cf:ffff:ffff:ffff:ffff:ffff:ffff
1422ae2:8d0::/282ae2:8df:ffff:ffff:ffff:ffff:ffff:ffff
1432ae2:8e0::/282ae2:8ef:ffff:ffff:ffff:ffff:ffff:ffff
1442ae2:8f0::/282ae2:8ff:ffff:ffff:ffff:ffff:ffff:ffff
1452ae2:900::/282ae2:90f:ffff:ffff:ffff:ffff:ffff:ffff
1462ae2:910::/282ae2:91f:ffff:ffff:ffff:ffff:ffff:ffff
1472ae2:920::/282ae2:92f:ffff:ffff:ffff:ffff:ffff:ffff
1482ae2:930::/282ae2:93f:ffff:ffff:ffff:ffff:ffff:ffff
1492ae2:940::/282ae2:94f:ffff:ffff:ffff:ffff:ffff:ffff
1502ae2:950::/282ae2:95f:ffff:ffff:ffff:ffff:ffff:ffff
1512ae2:960::/282ae2:96f:ffff:ffff:ffff:ffff:ffff:ffff
1522ae2:970::/282ae2:97f:ffff:ffff:ffff:ffff:ffff:ffff
1532ae2:980::/282ae2:98f:ffff:ffff:ffff:ffff:ffff:ffff
1542ae2:990::/282ae2:99f:ffff:ffff:ffff:ffff:ffff:ffff
1552ae2:9a0::/282ae2:9af:ffff:ffff:ffff:ffff:ffff:ffff
1562ae2:9b0::/282ae2:9bf:ffff:ffff:ffff:ffff:ffff:ffff
1572ae2:9c0::/282ae2:9cf:ffff:ffff:ffff:ffff:ffff:ffff
1582ae2:9d0::/282ae2:9df:ffff:ffff:ffff:ffff:ffff:ffff
1592ae2:9e0::/282ae2:9ef:ffff:ffff:ffff:ffff:ffff:ffff
1602ae2:9f0::/282ae2:9ff:ffff:ffff:ffff:ffff:ffff:ffff
1612ae2:a00::/282ae2:a0f:ffff:ffff:ffff:ffff:ffff:ffff
1622ae2:a10::/282ae2:a1f:ffff:ffff:ffff:ffff:ffff:ffff
1632ae2:a20::/282ae2:a2f:ffff:ffff:ffff:ffff:ffff:ffff
1642ae2:a30::/282ae2:a3f:ffff:ffff:ffff:ffff:ffff:ffff
1652ae2:a40::/282ae2:a4f:ffff:ffff:ffff:ffff:ffff:ffff
1662ae2:a50::/282ae2:a5f:ffff:ffff:ffff:ffff:ffff:ffff
1672ae2:a60::/282ae2:a6f:ffff:ffff:ffff:ffff:ffff:ffff
1682ae2:a70::/282ae2:a7f:ffff:ffff:ffff:ffff:ffff:ffff
1692ae2:a80::/282ae2:a8f:ffff:ffff:ffff:ffff:ffff:ffff
1702ae2:a90::/282ae2:a9f:ffff:ffff:ffff:ffff:ffff:ffff
1712ae2:aa0::/282ae2:aaf:ffff:ffff:ffff:ffff:ffff:ffff
1722ae2:ab0::/282ae2:abf:ffff:ffff:ffff:ffff:ffff:ffff
1732ae2:ac0::/282ae2:acf:ffff:ffff:ffff:ffff:ffff:ffff
1742ae2:ad0::/282ae2:adf:ffff:ffff:ffff:ffff:ffff:ffff
1752ae2:ae0::/282ae2:aef:ffff:ffff:ffff:ffff:ffff:ffff
1762ae2:af0::/282ae2:aff:ffff:ffff:ffff:ffff:ffff:ffff
1772ae2:b00::/282ae2:b0f:ffff:ffff:ffff:ffff:ffff:ffff
1782ae2:b10::/282ae2:b1f:ffff:ffff:ffff:ffff:ffff:ffff
1792ae2:b20::/282ae2:b2f:ffff:ffff:ffff:ffff:ffff:ffff
1802ae2:b30::/282ae2:b3f:ffff:ffff:ffff:ffff:ffff:ffff
1812ae2:b40::/282ae2:b4f:ffff:ffff:ffff:ffff:ffff:ffff
1822ae2:b50::/282ae2:b5f:ffff:ffff:ffff:ffff:ffff:ffff
1832ae2:b60::/282ae2:b6f:ffff:ffff:ffff:ffff:ffff:ffff
1842ae2:b70::/282ae2:b7f:ffff:ffff:ffff:ffff:ffff:ffff
1852ae2:b80::/282ae2:b8f:ffff:ffff:ffff:ffff:ffff:ffff
1862ae2:b90::/282ae2:b9f:ffff:ffff:ffff:ffff:ffff:ffff
1872ae2:ba0::/282ae2:baf:ffff:ffff:ffff:ffff:ffff:ffff
1882ae2:bb0::/282ae2:bbf:ffff:ffff:ffff:ffff:ffff:ffff
1892ae2:bc0::/282ae2:bcf:ffff:ffff:ffff:ffff:ffff:ffff
1902ae2:bd0::/282ae2:bdf:ffff:ffff:ffff:ffff:ffff:ffff
1912ae2:be0::/282ae2:bef:ffff:ffff:ffff:ffff:ffff:ffff
1922ae2:bf0::/282ae2:bff:ffff:ffff:ffff:ffff:ffff:ffff
1932ae2:c00::/282ae2:c0f:ffff:ffff:ffff:ffff:ffff:ffff
1942ae2:c10::/282ae2:c1f:ffff:ffff:ffff:ffff:ffff:ffff
1952ae2:c20::/282ae2:c2f:ffff:ffff:ffff:ffff:ffff:ffff
1962ae2:c30::/282ae2:c3f:ffff:ffff:ffff:ffff:ffff:ffff
1972ae2:c40::/282ae2:c4f:ffff:ffff:ffff:ffff:ffff:ffff
1982ae2:c50::/282ae2:c5f:ffff:ffff:ffff:ffff:ffff:ffff
1992ae2:c60::/282ae2:c6f:ffff:ffff:ffff:ffff:ffff:ffff
2002ae2:c70::/282ae2:c7f:ffff:ffff:ffff:ffff:ffff:ffff
2012ae2:c80::/282ae2:c8f:ffff:ffff:ffff:ffff:ffff:ffff
2022ae2:c90::/282ae2:c9f:ffff:ffff:ffff:ffff:ffff:ffff
2032ae2:ca0::/282ae2:caf:ffff:ffff:ffff:ffff:ffff:ffff
2042ae2:cb0::/282ae2:cbf:ffff:ffff:ffff:ffff:ffff:ffff
2052ae2:cc0::/282ae2:ccf:ffff:ffff:ffff:ffff:ffff:ffff
2062ae2:cd0::/282ae2:cdf:ffff:ffff:ffff:ffff:ffff:ffff
2072ae2:ce0::/282ae2:cef:ffff:ffff:ffff:ffff:ffff:ffff
2082ae2:cf0::/282ae2:cff:ffff:ffff:ffff:ffff:ffff:ffff
2092ae2:d00::/282ae2:d0f:ffff:ffff:ffff:ffff:ffff:ffff
2102ae2:d10::/282ae2:d1f:ffff:ffff:ffff:ffff:ffff:ffff
2112ae2:d20::/282ae2:d2f:ffff:ffff:ffff:ffff:ffff:ffff
2122ae2:d30::/282ae2:d3f:ffff:ffff:ffff:ffff:ffff:ffff
2132ae2:d40::/282ae2:d4f:ffff:ffff:ffff:ffff:ffff:ffff
2142ae2:d50::/282ae2:d5f:ffff:ffff:ffff:ffff:ffff:ffff
2152ae2:d60::/282ae2:d6f:ffff:ffff:ffff:ffff:ffff:ffff
2162ae2:d70::/282ae2:d7f:ffff:ffff:ffff:ffff:ffff:ffff
2172ae2:d80::/282ae2:d8f:ffff:ffff:ffff:ffff:ffff:ffff
2182ae2:d90::/282ae2:d9f:ffff:ffff:ffff:ffff:ffff:ffff
2192ae2:da0::/282ae2:daf:ffff:ffff:ffff:ffff:ffff:ffff
2202ae2:db0::/282ae2:dbf:ffff:ffff:ffff:ffff:ffff:ffff
2212ae2:dc0::/282ae2:dcf:ffff:ffff:ffff:ffff:ffff:ffff
2222ae2:dd0::/282ae2:ddf:ffff:ffff:ffff:ffff:ffff:ffff
2232ae2:de0::/282ae2:def:ffff:ffff:ffff:ffff:ffff:ffff
2242ae2:df0::/282ae2:dff:ffff:ffff:ffff:ffff:ffff:ffff
2252ae2:e00::/282ae2:e0f:ffff:ffff:ffff:ffff:ffff:ffff
2262ae2:e10::/282ae2:e1f:ffff:ffff:ffff:ffff:ffff:ffff
2272ae2:e20::/282ae2:e2f:ffff:ffff:ffff:ffff:ffff:ffff
2282ae2:e30::/282ae2:e3f:ffff:ffff:ffff:ffff:ffff:ffff
2292ae2:e40::/282ae2:e4f:ffff:ffff:ffff:ffff:ffff:ffff
2302ae2:e50::/282ae2:e5f:ffff:ffff:ffff:ffff:ffff:ffff
2312ae2:e60::/282ae2:e6f:ffff:ffff:ffff:ffff:ffff:ffff
2322ae2:e70::/282ae2:e7f:ffff:ffff:ffff:ffff:ffff:ffff
2332ae2:e80::/282ae2:e8f:ffff:ffff:ffff:ffff:ffff:ffff
2342ae2:e90::/282ae2:e9f:ffff:ffff:ffff:ffff:ffff:ffff
2352ae2:ea0::/282ae2:eaf:ffff:ffff:ffff:ffff:ffff:ffff
2362ae2:eb0::/282ae2:ebf:ffff:ffff:ffff:ffff:ffff:ffff
2372ae2:ec0::/282ae2:ecf:ffff:ffff:ffff:ffff:ffff:ffff
2382ae2:ed0::/282ae2:edf:ffff:ffff:ffff:ffff:ffff:ffff
2392ae2:ee0::/282ae2:eef:ffff:ffff:ffff:ffff:ffff:ffff
2402ae2:ef0::/282ae2:eff:ffff:ffff:ffff:ffff:ffff:ffff
2412ae2:f00::/282ae2:f0f:ffff:ffff:ffff:ffff:ffff:ffff
2422ae2:f10::/282ae2:f1f:ffff:ffff:ffff:ffff:ffff:ffff
2432ae2:f20::/282ae2:f2f:ffff:ffff:ffff:ffff:ffff:ffff
2442ae2:f30::/282ae2:f3f:ffff:ffff:ffff:ffff:ffff:ffff
2452ae2:f40::/282ae2:f4f:ffff:ffff:ffff:ffff:ffff:ffff
2462ae2:f50::/282ae2:f5f:ffff:ffff:ffff:ffff:ffff:ffff
2472ae2:f60::/282ae2:f6f:ffff:ffff:ffff:ffff:ffff:ffff
2482ae2:f70::/282ae2:f7f:ffff:ffff:ffff:ffff:ffff:ffff
2492ae2:f80::/282ae2:f8f:ffff:ffff:ffff:ffff:ffff:ffff
2502ae2:f90::/282ae2:f9f:ffff:ffff:ffff:ffff:ffff:ffff
2512ae2:fa0::/282ae2:faf:ffff:ffff:ffff:ffff:ffff:ffff
2522ae2:fb0::/282ae2:fbf:ffff:ffff:ffff:ffff:ffff:ffff
2532ae2:fc0::/282ae2:fcf:ffff:ffff:ffff:ffff:ffff:ffff
2542ae2:fd0::/282ae2:fdf:ffff:ffff:ffff:ffff:ffff:ffff
2552ae2:fe0::/282ae2:fef:ffff:ffff:ffff:ffff:ffff:ffff
2562ae2:ff0::/282ae2:fff:ffff:ffff:ffff:ffff:ffff:ffff

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.