| Subnetzmaske dezimal | Notation | Subnetzmaske binär | max. Host | Bemerkung |
| 0.0.0.0 | /0 | 00000000.00000000.00000000.00000000 | - | ganzer IPv4-Adress-Raum |
| 255.0.0.0 | /8 | 11111111.00000000.00000000.00000000 | 16'777'214 | max. Klasse A Netz |
| 255.240.0.0 | /12 | 11111111.11110000.00000000.00000000 | 1'048'574 | max. Klasse B Netz |
| 255.255.0.0 | /16 | 11111111.11111111.00000000.00000000 | 65'534 | max. Klasse C Netz |
| 255.255.255.0 | /24 | 11111111.11111111.11111111.00000000 | 254 | Typisches Klasse C Netzwerk |
| 255.255.255.252 | /30 | 11111111.11111111.11111111.11111100 | 2 | Verbindungsnetz zwischen zwei Routern |
| 255.255.255.255 | /32 | 11111111.11111111.11111111.11111111 | 1 | einzelner Host |