IPv4 Subnetmask
Präfixlängen als Netzgrößen
| CIDR | Netzmaske | Anzahl nutzbarer IPv4-Adressen |
| /0 | 0.0.0.0 | 4.294.967.296 |
| /4 | 240.0.0.0 | 268.435.454 |
| /8 | 255.0.0.0 | 16.777.214 |
| /10 | 255.192.0.0 | 4.194.302 |
| /12 | 255.240.0.0 | 1.048.574 |
| /16 | 255.255.0.0 | 65.534 |
| /17 | 255.255.128.0 | 32.768 |
| /18 | 255.255.192.0 | 16.382 |
| /19 | 255.255.224.0 | 8.190 |
| /20 | 255.255.240.0 | 4094 |
| /21 | 255.255.248.0 | 2046 |
| /22 | 255.255.252.0 | 1022 |
| /23 | 255.255.254.0 | 510 |
| /24 | 255.255.255.0 | 254 |
| /25 | 255.255.255.128 | 126 |
| /26 | 255.255.255.192 | 62 |
| /27 | 255.255.255.224 | 30 |
| /28 | 255.255.255.240 | 14 |
| /29 | 255.255.255.248 | 6 |
| /30 | 255.255.255.252 | 2 |
| /31 | 255.255.255.254 | Keine |
| /32 | 255.255.255.255 | Keine |
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