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/3
Addresses2^125
/64 networks2^61
- Network
2000::/3- First address
2000::- Last address
3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff- Addresses
- 42,535,295,865,117,307,932,921,825,928,971,026,432 (2^125)
- /64 networks (LANs)
- 2,305,843,009,213,693,952 (2^61)
- Full form
2000:0000:0000:0000:0000:0000:0000:0000- Type
- Global unicast 2000::/3
Public internet addresses - Reverse DNS zones
2.ip6.arpa3.ip6.arpa
/3 is not on a 4-bit boundary, so it takes 2 /4 zones.
Split into smaller subnets
2000::/3 makes 512 subnets of /12; the first 256 are listed.
| # | Subnet | Last address |
|---|---|---|
| 1 | 2000::/12 | 200f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 2 | 2010::/12 | 201f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 3 | 2020::/12 | 202f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 4 | 2030::/12 | 203f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 5 | 2040::/12 | 204f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 6 | 2050::/12 | 205f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 7 | 2060::/12 | 206f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 8 | 2070::/12 | 207f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 9 | 2080::/12 | 208f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 10 | 2090::/12 | 209f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 11 | 20a0::/12 | 20af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 12 | 20b0::/12 | 20bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 13 | 20c0::/12 | 20cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 14 | 20d0::/12 | 20df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 15 | 20e0::/12 | 20ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 16 | 20f0::/12 | 20ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 17 | 2100::/12 | 210f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 18 | 2110::/12 | 211f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 19 | 2120::/12 | 212f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 20 | 2130::/12 | 213f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 21 | 2140::/12 | 214f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 22 | 2150::/12 | 215f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 23 | 2160::/12 | 216f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 24 | 2170::/12 | 217f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 25 | 2180::/12 | 218f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 26 | 2190::/12 | 219f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 27 | 21a0::/12 | 21af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 28 | 21b0::/12 | 21bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 29 | 21c0::/12 | 21cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 30 | 21d0::/12 | 21df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 31 | 21e0::/12 | 21ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 32 | 21f0::/12 | 21ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 33 | 2200::/12 | 220f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 34 | 2210::/12 | 221f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 35 | 2220::/12 | 222f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 36 | 2230::/12 | 223f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 37 | 2240::/12 | 224f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 38 | 2250::/12 | 225f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 39 | 2260::/12 | 226f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 40 | 2270::/12 | 227f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 41 | 2280::/12 | 228f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 42 | 2290::/12 | 229f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 43 | 22a0::/12 | 22af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 44 | 22b0::/12 | 22bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 45 | 22c0::/12 | 22cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 46 | 22d0::/12 | 22df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 47 | 22e0::/12 | 22ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 48 | 22f0::/12 | 22ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 49 | 2300::/12 | 230f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 50 | 2310::/12 | 231f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 51 | 2320::/12 | 232f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 52 | 2330::/12 | 233f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 53 | 2340::/12 | 234f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 54 | 2350::/12 | 235f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 55 | 2360::/12 | 236f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 56 | 2370::/12 | 237f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 57 | 2380::/12 | 238f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 58 | 2390::/12 | 239f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 59 | 23a0::/12 | 23af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 60 | 23b0::/12 | 23bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 61 | 23c0::/12 | 23cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 62 | 23d0::/12 | 23df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 63 | 23e0::/12 | 23ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 64 | 23f0::/12 | 23ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 65 | 2400::/12 | 240f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 66 | 2410::/12 | 241f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 67 | 2420::/12 | 242f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 68 | 2430::/12 | 243f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 69 | 2440::/12 | 244f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 70 | 2450::/12 | 245f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 71 | 2460::/12 | 246f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 72 | 2470::/12 | 247f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 73 | 2480::/12 | 248f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 74 | 2490::/12 | 249f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 75 | 24a0::/12 | 24af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 76 | 24b0::/12 | 24bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 77 | 24c0::/12 | 24cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 78 | 24d0::/12 | 24df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 79 | 24e0::/12 | 24ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 80 | 24f0::/12 | 24ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 81 | 2500::/12 | 250f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 82 | 2510::/12 | 251f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 83 | 2520::/12 | 252f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 84 | 2530::/12 | 253f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 85 | 2540::/12 | 254f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 86 | 2550::/12 | 255f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 87 | 2560::/12 | 256f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 88 | 2570::/12 | 257f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 89 | 2580::/12 | 258f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 90 | 2590::/12 | 259f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 91 | 25a0::/12 | 25af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 92 | 25b0::/12 | 25bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 93 | 25c0::/12 | 25cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 94 | 25d0::/12 | 25df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 95 | 25e0::/12 | 25ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 96 | 25f0::/12 | 25ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 97 | 2600::/12 | 260f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 98 | 2610::/12 | 261f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 99 | 2620::/12 | 262f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 100 | 2630::/12 | 263f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 101 | 2640::/12 | 264f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 102 | 2650::/12 | 265f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 103 | 2660::/12 | 266f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 104 | 2670::/12 | 267f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 105 | 2680::/12 | 268f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 106 | 2690::/12 | 269f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 107 | 26a0::/12 | 26af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 108 | 26b0::/12 | 26bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 109 | 26c0::/12 | 26cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 110 | 26d0::/12 | 26df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 111 | 26e0::/12 | 26ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 112 | 26f0::/12 | 26ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 113 | 2700::/12 | 270f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 114 | 2710::/12 | 271f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 115 | 2720::/12 | 272f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 116 | 2730::/12 | 273f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 117 | 2740::/12 | 274f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 118 | 2750::/12 | 275f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 119 | 2760::/12 | 276f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 120 | 2770::/12 | 277f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 121 | 2780::/12 | 278f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 122 | 2790::/12 | 279f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 123 | 27a0::/12 | 27af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 124 | 27b0::/12 | 27bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 125 | 27c0::/12 | 27cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 126 | 27d0::/12 | 27df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 127 | 27e0::/12 | 27ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 128 | 27f0::/12 | 27ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 129 | 2800::/12 | 280f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 130 | 2810::/12 | 281f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 131 | 2820::/12 | 282f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 132 | 2830::/12 | 283f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 133 | 2840::/12 | 284f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 134 | 2850::/12 | 285f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 135 | 2860::/12 | 286f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 136 | 2870::/12 | 287f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 137 | 2880::/12 | 288f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 138 | 2890::/12 | 289f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 139 | 28a0::/12 | 28af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 140 | 28b0::/12 | 28bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 141 | 28c0::/12 | 28cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 142 | 28d0::/12 | 28df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 143 | 28e0::/12 | 28ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 144 | 28f0::/12 | 28ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 145 | 2900::/12 | 290f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 146 | 2910::/12 | 291f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 147 | 2920::/12 | 292f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 148 | 2930::/12 | 293f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 149 | 2940::/12 | 294f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 150 | 2950::/12 | 295f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 151 | 2960::/12 | 296f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 152 | 2970::/12 | 297f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 153 | 2980::/12 | 298f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 154 | 2990::/12 | 299f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 155 | 29a0::/12 | 29af:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 156 | 29b0::/12 | 29bf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 157 | 29c0::/12 | 29cf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 158 | 29d0::/12 | 29df:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 159 | 29e0::/12 | 29ef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 160 | 29f0::/12 | 29ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 161 | 2a00::/12 | 2a0f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 162 | 2a10::/12 | 2a1f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 163 | 2a20::/12 | 2a2f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 164 | 2a30::/12 | 2a3f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 165 | 2a40::/12 | 2a4f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 166 | 2a50::/12 | 2a5f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 167 | 2a60::/12 | 2a6f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 168 | 2a70::/12 | 2a7f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 169 | 2a80::/12 | 2a8f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 170 | 2a90::/12 | 2a9f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 171 | 2aa0::/12 | 2aaf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 172 | 2ab0::/12 | 2abf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 173 | 2ac0::/12 | 2acf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 174 | 2ad0::/12 | 2adf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 175 | 2ae0::/12 | 2aef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 176 | 2af0::/12 | 2aff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 177 | 2b00::/12 | 2b0f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 178 | 2b10::/12 | 2b1f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 179 | 2b20::/12 | 2b2f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 180 | 2b30::/12 | 2b3f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 181 | 2b40::/12 | 2b4f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 182 | 2b50::/12 | 2b5f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 183 | 2b60::/12 | 2b6f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 184 | 2b70::/12 | 2b7f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 185 | 2b80::/12 | 2b8f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 186 | 2b90::/12 | 2b9f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 187 | 2ba0::/12 | 2baf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 188 | 2bb0::/12 | 2bbf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 189 | 2bc0::/12 | 2bcf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 190 | 2bd0::/12 | 2bdf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 191 | 2be0::/12 | 2bef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 192 | 2bf0::/12 | 2bff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 193 | 2c00::/12 | 2c0f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 194 | 2c10::/12 | 2c1f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 195 | 2c20::/12 | 2c2f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 196 | 2c30::/12 | 2c3f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 197 | 2c40::/12 | 2c4f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 198 | 2c50::/12 | 2c5f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 199 | 2c60::/12 | 2c6f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 200 | 2c70::/12 | 2c7f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 201 | 2c80::/12 | 2c8f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 202 | 2c90::/12 | 2c9f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 203 | 2ca0::/12 | 2caf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 204 | 2cb0::/12 | 2cbf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 205 | 2cc0::/12 | 2ccf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 206 | 2cd0::/12 | 2cdf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 207 | 2ce0::/12 | 2cef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 208 | 2cf0::/12 | 2cff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 209 | 2d00::/12 | 2d0f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 210 | 2d10::/12 | 2d1f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 211 | 2d20::/12 | 2d2f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 212 | 2d30::/12 | 2d3f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 213 | 2d40::/12 | 2d4f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 214 | 2d50::/12 | 2d5f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 215 | 2d60::/12 | 2d6f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 216 | 2d70::/12 | 2d7f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 217 | 2d80::/12 | 2d8f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 218 | 2d90::/12 | 2d9f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 219 | 2da0::/12 | 2daf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 220 | 2db0::/12 | 2dbf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 221 | 2dc0::/12 | 2dcf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 222 | 2dd0::/12 | 2ddf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 223 | 2de0::/12 | 2def:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 224 | 2df0::/12 | 2dff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 225 | 2e00::/12 | 2e0f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 226 | 2e10::/12 | 2e1f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 227 | 2e20::/12 | 2e2f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 228 | 2e30::/12 | 2e3f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 229 | 2e40::/12 | 2e4f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 230 | 2e50::/12 | 2e5f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 231 | 2e60::/12 | 2e6f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 232 | 2e70::/12 | 2e7f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 233 | 2e80::/12 | 2e8f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 234 | 2e90::/12 | 2e9f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 235 | 2ea0::/12 | 2eaf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 236 | 2eb0::/12 | 2ebf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 237 | 2ec0::/12 | 2ecf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 238 | 2ed0::/12 | 2edf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 239 | 2ee0::/12 | 2eef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 240 | 2ef0::/12 | 2eff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 241 | 2f00::/12 | 2f0f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 242 | 2f10::/12 | 2f1f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 243 | 2f20::/12 | 2f2f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 244 | 2f30::/12 | 2f3f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 245 | 2f40::/12 | 2f4f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 246 | 2f50::/12 | 2f5f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 247 | 2f60::/12 | 2f6f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 248 | 2f70::/12 | 2f7f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 249 | 2f80::/12 | 2f8f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 250 | 2f90::/12 | 2f9f:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 251 | 2fa0::/12 | 2faf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 252 | 2fb0::/12 | 2fbf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 253 | 2fc0::/12 | 2fcf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 254 | 2fd0::/12 | 2fdf:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 255 | 2fe0::/12 | 2fef:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
| 256 | 2ff0::/12 | 2fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
IPv4 CIDR reference (/0 to /32)
| Prefix | Subnet mask | Wildcard | Addresses | Usable hosts | Size | Typical use |
|---|---|---|---|---|---|---|
| /0 | 0.0.0.0 | 255.255.255.255 | 4,294,967,296 | 4,294,967,294 | 16,777,216 × /24 | |
| /1 | 128.0.0.0 | 127.255.255.255 | 2,147,483,648 | 2,147,483,646 | 8,388,608 × /24 | |
| /2 | 192.0.0.0 | 63.255.255.255 | 1,073,741,824 | 1,073,741,822 | 4,194,304 × /24 | |
| /3 | 224.0.0.0 | 31.255.255.255 | 536,870,912 | 536,870,910 | 2,097,152 × /24 | |
| /4 | 240.0.0.0 | 15.255.255.255 | 268,435,456 | 268,435,454 | 1,048,576 × /24 | |
| /5 | 248.0.0.0 | 7.255.255.255 | 134,217,728 | 134,217,726 | 524,288 × /24 | |
| /6 | 252.0.0.0 | 3.255.255.255 | 67,108,864 | 67,108,862 | 262,144 × /24 | |
| /7 | 254.0.0.0 | 1.255.255.255 | 33,554,432 | 33,554,430 | 131,072 × /24 | |
| /8 | 255.0.0.0 | 0.255.255.255 | 16,777,216 | 16,777,214 | 65,536 × /24 | Old class A; 10.0.0.0/8 |
| /9 | 255.128.0.0 | 0.127.255.255 | 8,388,608 | 8,388,606 | 32,768 × /24 | |
| /10 | 255.192.0.0 | 0.63.255.255 | 4,194,304 | 4,194,302 | 16,384 × /24 | |
| /11 | 255.224.0.0 | 0.31.255.255 | 2,097,152 | 2,097,150 | 8,192 × /24 | |
| /12 | 255.240.0.0 | 0.15.255.255 | 1,048,576 | 1,048,574 | 4,096 × /24 | 172.16.0.0/12 |
| /13 | 255.248.0.0 | 0.7.255.255 | 524,288 | 524,286 | 2,048 × /24 | |
| /14 | 255.252.0.0 | 0.3.255.255 | 262,144 | 262,142 | 1,024 × /24 | |
| /15 | 255.254.0.0 | 0.1.255.255 | 131,072 | 131,070 | 512 × /24 | |
| /16 | 255.255.0.0 | 0.0.255.255 | 65,536 | 65,534 | 256 × /24 | Old class B; 192.168.0.0/16 |
| /17 | 255.255.128.0 | 0.0.127.255 | 32,768 | 32,766 | 128 × /24 | |
| /18 | 255.255.192.0 | 0.0.63.255 | 16,384 | 16,382 | 64 × /24 | |
| /19 | 255.255.224.0 | 0.0.31.255 | 8,192 | 8,190 | 32 × /24 | |
| /20 | 255.255.240.0 | 0.0.15.255 | 4,096 | 4,094 | 16 × /24 | |
| /21 | 255.255.248.0 | 0.0.7.255 | 2,048 | 2,046 | 8 × /24 | |
| /22 | 255.255.252.0 | 0.0.3.255 | 1,024 | 1,022 | 4 × /24 | Large office or guest Wi-Fi (1,022 hosts) |
| /23 | 255.255.254.0 | 0.0.1.255 | 512 | 510 | 2 × /24 | Larger office LAN (510 hosts) |
| /24 | 255.255.255.0 | 0.0.0.255 | 256 | 254 | 1 × /24 | Typical office LAN (old class C) |
| /25 | 255.255.255.128 | 0.0.0.127 | 128 | 126 | 1/2 of a /24 | Smaller LAN or VLAN |
| /26 | 255.255.255.192 | 0.0.0.63 | 64 | 62 | 1/4 of a /24 | Smaller LAN or VLAN |
| /27 | 255.255.255.224 | 0.0.0.31 | 32 | 30 | 1/8 of a /24 | Small VLAN, phones, cameras |
| /28 | 255.255.255.240 | 0.0.0.15 | 16 | 14 | 1/16 of a /24 | Small VLAN, phones, cameras |
| /29 | 255.255.255.248 | 0.0.0.7 | 8 | 6 | 1/32 of a /24 | Small fixed public block (5 usable) |
| /30 | 255.255.255.252 | 0.0.0.3 | 4 | 2 | 1/64 of a /24 | Point-to-point (old style) |
| /31 | 255.255.255.254 | 0.0.0.1 | 2 | 2 | 1/128 of a /24 | Point-to-point link (RFC 3021) |
| /32 | 255.255.255.255 | 0.0.0.0 | 1 | 1 | 1/256 of a /24 | One host |
IPv6 prefix reference
| Prefix | Addresses | /64 LANs | /48 sites | Nibble | Typical use |
|---|---|---|---|---|---|
| /3 | 42,535,295,865,117,307,932,921,825,928,971,026,432 (2^125) | 2,305,843,009,213,693,952 | 35,184,372,088,832 | No | All global unicast (2000::/3) |
| /16 | 5,192,296,858,534,827,628,530,496,329,220,096 (2^112) | 281,474,976,710,656 | 4,294,967,296 | Yes | |
| /20 | 324,518,553,658,426,726,783,156,020,576,256 (2^108) | 17,592,186,044,416 | 268,435,456 | Yes | Large provider allocation (RIPE minimum for some) |
| /29 | 633,825,300,114,114,700,748,351,602,688 (2^99) | 34,359,738,368 | 524,288 | No | RIPE allocation to a provider (often) |
| /32 | 79,228,162,514,264,337,593,543,950,336 (2^96) | 4,294,967,296 | 65,536 | Yes | Provider allocation (RIPE default) |
| /36 | 4,951,760,157,141,521,099,596,496,896 (2^92) | 268,435,456 | 4,096 | Yes | |
| /40 | 309,485,009,821,345,068,724,781,056 (2^88) | 16,777,216 | 256 | Yes | |
| /44 | 19,342,813,113,834,066,795,298,816 (2^84) | 1,048,576 | 16 | Yes | |
| /48 | 1,208,925,819,614,629,174,706,176 (2^80) | 65,536 | 1 | Yes | One site or organisation (RIPE PI / assignment) |
| /52 | 75,557,863,725,914,323,419,136 (2^76) | 4,096 | Yes | ||
| /56 | 4,722,366,482,869,645,213,696 (2^72) | 256 | Yes | Small site or home (common provider assignment) | |
| /60 | 295,147,905,179,352,825,856 (2^68) | 16 | Yes | Some home broadband (16 LANs) | |
| /64 | 18,446,744,073,709,551,616 (2^64) | 1 | Yes | One LAN or VLAN (needed for SLAAC) | |
| /72 | 72,057,594,037,927,936 (2^56) | 1/256 of a /64 | Yes | ||
| /80 | 281,474,976,710,656 (2^48) | 1/65,536 of a /64 | Yes | ||
| /96 | 4,294,967,296 | 1/4,294,967,296 of a /64 | Yes | Embeds an IPv4 address (NAT64) | |
| /112 | 65,536 | 1/281,474,976,710,656 of a /64 | Yes | ||
| /120 | 256 | 1/72,057,594,037,927,936 of a /64 | Yes | ||
| /124 | 16 | 1/1,152,921,504,606,846,976 of a /64 | Yes | ||
| /126 | 4 | 1/4,611,686,018,427,387,904 of a /64 | No | ||
| /127 | 2 | 1/9,223,372,036,854,775,808 of a /64 | No | Point-to-point link (RFC 6164) | |
| /128 | 1 | 1/18,446,744,073,709,551,616 of a /64 | Yes | One host or loopback |
Private and special ranges
IPv4
| Range | Name | What it is |
|---|---|---|
255.255.255.255/32 | Limited broadcast | Every host on the local network |
0.0.0.0/8 | This network | Not routed; 0.0.0.0 means "any address" in settings |
10.0.0.0/8 | Private (RFC 1918) | Office and home networks; not routed on the internet |
100.64.0.0/10 | Shared address space (CGNAT) | Used by providers behind carrier-grade NAT (RFC 6598) |
127.0.0.0/8 | Loopback | This computer |
169.254.0.0/16 | Link-local (APIPA) | Self-assigned when no DHCP server answers |
172.16.0.0/12 | Private (RFC 1918) | Office and home networks; not routed on the internet |
192.0.0.0/24 | IETF protocol assignments | Special uses such as DS-Lite |
192.0.2.0/24 | Documentation (TEST-NET-1) | For examples; never used on a network |
192.88.99.0/24 | 6to4 relay (deprecated) | Formerly anycast for 6to4 |
192.168.0.0/16 | Private (RFC 1918) | Office and home networks; not routed on the internet |
198.18.0.0/15 | Benchmarking | Network equipment testing (RFC 2544) |
198.51.100.0/24 | Documentation (TEST-NET-2) | For examples; never used on a network |
203.0.113.0/24 | Documentation (TEST-NET-3) | For examples; never used on a network |
224.0.0.0/4 | Multicast | One-to-many traffic, such as IPTV and routing protocols |
240.0.0.0/4 | Reserved | Future use; not usable on most systems |
IPv6
| Range | Name | What it is |
|---|---|---|
::/128 | Unspecified | No address; :: means "any address" in settings |
::1/128 | Loopback | This computer |
::ffff:0:0/96 | IPv4-mapped | An IPv4 address written as IPv6 |
64:ff9b::/96 | NAT64 | IPv4 addresses reached through a NAT64 gateway |
100::/64 | Discard only | Traffic sent here is dropped (RFC 6666) |
2001:db8::/32 | Documentation | For examples; never used on a network |
2001::/32 | Teredo | IPv6 tunnelled over IPv4 UDP |
2002::/16 | 6to4 | IPv6 tunnelled over IPv4 (largely retired) |
3fff::/20 | Documentation | For examples (RFC 9637) |
fc00::/7 | Unique local (ULA) | Private IPv6, like RFC 1918; usually fd00::/8 |
fe80::/10 | Link-local | Every IPv6 interface has one; not routed |
ff00::/8 | Multicast | One-to-many traffic; replaces broadcast |
2000::/3 | Global unicast | Public internet addresses |