Netmask Chart (IPv4)
| Bitmask | Dotted Quad | Hexadecimal | Wildcard |
|---|---|---|---|
| /0 | 0.0.0.0 | 0x00000000 | 255.255.255.255 |
| /1 | 128.0.0.0 | 0x80000000 | 127.255.255.255 |
| /2 | 192.0.0.0 | 0xc0000000 | 63.255.255.255 |
| /3 | 224.0.0.0 | 0xe0000000 | 31.255.255.255 |
| /4 | 240.0.0.0 | 0xf0000000 | 15.255.255.255 |
| /5 | 248.0.0.0 | 0xf8000000 | 7.255.255.255 |
| /6 | 252.0.0.0 | 0xfc000000 | 3.255.255.255 |
| /7 | 254.0.0.0 | 0xfe000000 | 1.255.255.255 |
| /8 | 255.0.0.0 | 0xff000000 | 0.255.255.255 |
| /9 | 255.128.0.0 | 0xff800000 | 0.127.255.255 |
| /10 | 255.192.0.0 | 0xffc00000 | 0.63.255.255 |
| /11 | 255.224.0.0 | 0xffe00000 | 0.31.255.255 |
| /12 | 255.240.0.0 | 0xfff00000 | 0.15.255.255 |
| /13 | 255.248.0.0 | 0xfff80000 | 0.7.255.255 |
| /14 | 255.252.0.0 | 0xfffc0000 | 0.3.255.255 |
| /15 | 255.254.0.0 | 0xfffe0000 | 0.1.255.255 |
| /16 | 255.255.0.0 | 0xffff0000 | 0.0.255.255 |
| /17 | 255.255.128.0 | 0xffff8000 | 0.0.127.255 |
| /18 | 255.255.192.0 | 0xffffc000 | 0.0.63.255 |
| /19 | 255.255.224.0 | 0xffffe000 | 0.0.31.255 |
| /20 | 255.255.240.0 | 0xfffff000 | 0.0.15.255 |
| /21 | 255.255.248.0 | 0xfffff800 | 0.0.7.255 |
| /22 | 255.255.252.0 | 0xfffffc00 | 0.0.3.255 |
| /23 | 255.255.254.0 | 0xfffffe00 | 0.0.1.255 |
| /24 | 255.255.255.0 | 0xffffff00 | 0.0.0.255 |
| /25 | 255.255.255.128 | 0xffffff80 | 0.0.0.127 |
| /26 | 255.255.255.192 | 0xffffffc0 | 0.0.0.63 |
| /27 | 255.255.255.224 | 0xffffffe0 | 0.0.0.31 |
| /28 | 255.255.255.240 | 0xfffffff0 | 0.0.0.15 |
| /29 | 255.255.255.248 | 0xfffffff8 | 0.0.0.7 |
| /30 | 255.255.255.252 | 0xfffffffc | 0.0.0.3 |
| /31 | 255.255.255.254 | 0xfffffffe | 0.0.0.1 |
| /32 | 255.255.255.255 | 0xffffffff | 0.0.0.0 |