| Präfix | Subnetz-Maske dezimal | Subnetz-Maske binär | Anzahl IPv4-Adressen | Erste IPv4-Adresse(n) im Subnetz | Kommentar |
|---|
| /32 | 255.255.255.255 | 11111111.11111111.11111111.11111111 | 1 | (alle) | einzelner Host |
| /31 | 255.255.255.254 | 11111111.11111111.11111111.11111110 | 2 | 0, 2, 4, 6, 8, (…) | oft als Transfer-Netz zwischen Routern genutzt |
| /30 | 255.255.255.252 | 11111111.11111111.11111111.11111100 | 4 | 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248, 252 |
| /29 | 255.255.255.248 | 11111111.11111111.11111111.11111000 | 8 | 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 128, 136, 144, 152, 160, 168,76, 184, 192, 200, 208, 216, 224, 232, 240, 248 |
| /28 | 255.255.255.240 | 11111111.11111111.11111111.11110000 | 16 | 0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240 |
| /27 | 255.255.255.224 | 11111111.11111111.11111111.11100000 | 32 | 0, 32, 64, 96, 128, 160, 192, 224 |
| /26 | 255.255.255.192 | 11111111.11111111.11111111.11000000 | 64 | 0, 64, 128, 192 |
| /25 | 255.255.255.128 | 11111111.11111111.11111111.10000000 | 128 | 0, 128 |
| /24 | 255.255.255.0 | 11111111.11111111.11111111.00000000 | 256 | | Class C-Netz |
| /23 | 255.255.254.0 | 11111111.11111111.11111110.00000000 | 512 | |
| /22 | 255.255.252.0 | 11111111.11111111.11111100.00000000 | 1.024 | |
| /21 | 255.255.248.0 | 11111111.11111111.11111000.00000000 | 2.048 | |
| /20 | 255.255.240.0 | 11111111.11111111.11110000.00000000 | 4.096 | |
| /19 | 255.255.224.0 | 11111111.11111111.11100000.00000000 | 8.192 | |
| /18 | 255.255.192.0 | 11111111.11111111.11000000.00000000 | 16.384 | |
| /17 | 255.255.128.0 | 11111111.11111111.10000000.00000000 | 32.768 | |
| /16 | 255.255.0.0 | 11111111.11111111.00000000.00000000 | 65.536 | | Class B-Netz |
| /15 | 255.254.0.0 | 11111111.11111110.00000000.00000000 | 131.072 | |
| /14 | 255.252.0.0 | 11111111.11111100.00000000.00000000 | 262.144 | |
| /13 | 255.248.0.0 | 11111111.11111000.00000000.00000000 | 524.288 | |
| /12 | 255.240.0.0 | 11111111.11110000.00000000.00000000 | 1.048.574 | |
| /11 | 255.224.0.0 | 11111111.11100000.00000000.00000000 | 2.097.150 | |
| /10 | 255.192.0.0 | 11111111.11000000.00000000.00000000 | 4.194.304 | |
| /9 | 255.128.0.0 | 11111111.10000000.00000000.00000000 | 8.388.608 | |
| /8 | 255.0.0.0 | 11111111.00000000.00000000.00000000 | 16.777.216 | | Class-A-Netz |
| /7 | 254.0.0.0 | 11111110.00000000.00000000.00000000 | 33.554.428 | |
| /6 | 252.0.0.0 | 11111100.00000000.00000000.00000000 | 67.108.856 | |
| /5 | 248.0.0.0 | 11111000.00000000.00000000.00000000 | 134.217.712 | |
| /4 | 240.0.0.0 | 11110000.00000000.00000000.00000000 | 268.435.424 | |
| /3 | 224.0.0.0 | 11100000.00000000.00000000.00000000 | 536.870.848 | |
| /2 | 192.0.0.0 | 11000000.00000000.00000000.00000000 | 1.073.741.696 | |
| /1 | 128.0.0.0 | 10000000.00000000.00000000.00000000 | 2.147.483.392 | |
| /0 | 0.0.0.0 | 00000000.00000000.00000000.00000000 | 4.294.966.784 | | alle IPv4-Adressen |
