Use our IPv4 Subnet Size chart as an reference for all public and private IPv4 subnet sizing information including subnet masks, total IPs, usable (public) IPs. Any questions? Leave a comment below. Are you looking to lease bulk IPv4 subnets or IPv6? Click here for our plans.
IPv4 Subnet Size Chart
| CIDR | Subnet Mask | Total IPs | Usable IPs |
| /32 | 255.255.255.255 | 1 | 1 |
| /31 | 255.255.255.254 | 2 | 2* |
| /30 | 255.255.255.252 | 4 | 2 |
| /29 | 255.255.255.248 | 8 | 6 |
| /28 | 255.255.255.240 | 16 | 14 |
| /27 | 255.255.255.224 | 32 | 30 |
| /26 | 255.255.255.192 | 64 | 62 |
| /25 | 255.255.255.128 | 128 | 126 |
| /24 | 255.255.255.0 | 256 | 254 |
| /23 | 255.255.254.0 | 512 | 510 |
| /22 | 255.255.252.0 | 1024 | 1022 |
| /21 | 255.255.248.0 | 2048 | 2046 |
| /20 | 255.255.240.0 | 4096 | 4094 |
| /19 | 255.255.224.0 | 8192 | 8190 |
| /18 | 255.255.192.0 | 16,384 | 16,382 |
| /17 | 255.255.128.0 | 32,768 | 32,766 |
| /16 | 255.255.0.0 | 65,536 | 65,534 |
| /15 | 255.254.0.0 | 131,072 | 131,070 |
| /14 | 255.252.0.0 | 262,144 | 262,142 |
| /13 | 255.248.0.0 | 524,288 | 524,286 |
| /12 | 255.240.0.0 | 1,048,576 | 1,048,574 |
| /11 | 255.224.0.0 | 2,097,152 | 2,097,150 |
| /10 | 255.192.0.0 | 4,194,304 | 4,194,302 |
| /9 | 255.128.0.0 | 8,388,608 | 8,388,606 |
| /8 | 255.0.0.0 | 16,777,216 | 16,777,214 |
| /7 | 254.0.0.0 | 33,554,432 | 33,554,430 |
| /6 | 252.0.0.0 | 67,108,864 | 67,108,862 |
| /5 | 248.0.0.0 | 134,217,728 | 134,217,726 |
| /4 | 240.0.0.0 | 268,435,456 | 268,435,454 |
| /3 | 224.0.0.0 | 536,870,912 | 536,870,910 |
| /2 | 192.0.0.0 | 1,073,741,824 | 1,073,741,822 |
| /1 | 128.0.0.0 | 2,147,483,648 | 2,147,483,646 |
Private IP ranges
Also known as reserved IP addresses, private IP ranges are used for special purposes.
| Address block | Address range | Number of addresses | Scope | Description |
|---|---|---|---|---|
| 0.0.0.0/8 | 0.0.0.0–0.255.255.255 | 16777216 | Software | Current (local, “this”) network |
| 10.0.0.0/8 | 10.0.0.0–10.255.255.255 | 16777216 | Private network | Used for local communications within a private network |
| 100.64.0.0/10 | 100.64.0.0–100.127.255.255 | 4194304 | Private network | Shared address space for communications between a service provider and its subscribers when using a carrier-grade NAT |
| 127.0.0.0/8 | 127.0.0.0–127.255.255.255 | 16777216 | Host | Used for loopback addresses to the local host |
| 169.254.0.0/16 | 169.254.0.0–169.254.255.255 | 65536 | Subnet | Used for link-local addresses between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server |
| 172.16.0.0/12 | 172.16.0.0–172.31.255.255 | 1048576 | Private network | Used for local communications within a private network |
| 192.0.0.0/24 | 192.0.0.0–192.0.0.255 | 256 | Private network | IETF Protocol Assignments, DS-Lite (/29) |
| 192.0.2.0/24 | 192.0.2.0–192.0.2.255 | 256 | Documentation | Assigned as TEST-NET-1, documentation and examples |
| 192.88.99.0/24 | 192.88.99.0–192.88.99.255 | 256 | Internet | Reserved. Formerly used for IPv6 to IPv4 relay (included IPv6 address block 2002::/16). |
| 192.168.0.0/16 | 192.168.0.0–192.168.255.255 | 65536 | Private network | Used for local communications within a private network |
| 198.18.0.0/15 | 198.18.0.0–198.19.255.255 | 131072 | Private network | Used for benchmark testing of inter-network communications between two separate subnets |
| 198.51.100.0/24 | 198.51.100.0–198.51.100.255 | 256 | Documentation | Assigned as TEST-NET-2, documentation and examples |
| 203.0.113.0/24 | 203.0.113.0–203.0.113.255 | 256 | Documentation | Assigned as TEST-NET-3, documentation and examples |
| 224.0.0.0/4 | 224.0.0.0–239.255.255.255 | 268435456 | Internet | In use for multicast (former Class D network) |
| 233.252.0.0/24 | 233.252.0.0-233.252.0.255 | 256 | Documentation | Assigned as MCAST-TEST-NET, documentation and examples (Note that this is part of the above multicast space.) |
| 240.0.0.0/4 | 240.0.0.0–255.255.255.254 | 268435455 | Internet | Reserved for future use[ (former Class E network) |
| 255.255.255.255/32 | 255.255.255.255 | 1 | Subnet | Reserved for the “limited broadcast” destination address |
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