ARIN's IPv4 Address Pool
Last updated: 2024-04-24
10240 addresses are unallocated. (Legacy addresses are not counted.)
Recent allocated or assigned address list
| Country | Range | Number of addresses | Date | Status |
|---|---|---|---|---|
| United States | 23.176.136.0 - 23.176.136.255 | 256 | 2024-04-23 | allocated |
| United States | 23.176.40.0 - 23.176.40.255 | 256 | 2024-04-23 | allocated |
| United States | 23.176.56.0 - 23.176.56.255 | 256 | 2024-04-23 | allocated |
| United States | 23.176.72.0 - 23.176.72.255 | 256 | 2024-04-23 | allocated |
| United States | 23.176.88.0 - 23.176.88.255 | 256 | 2024-04-23 | allocated |
| United States | 23.176.104.0 - 23.176.104.255 | 256 | 2024-04-23 | allocated |
| United States | 23.176.120.0 - 23.176.120.255 | 256 | 2024-04-23 | allocated |
| Canada | 23.162.185.0 - 23.162.185.255 | 256 | 2024-04-23 | allocated |
| United States | 206.71.158.0 - 206.71.158.255 | 256 | 2024-04-23 | allocated |
| Canada | 216.181.125.0 - 216.181.125.255 | 256 | 2024-04-23 | allocated |
| Canada | 216.181.4.0 - 216.181.4.255 | 256 | 2024-04-23 | allocated |
| United States | 23.176.24.0 - 23.176.24.255 | 256 | 2024-04-22 | allocated |
| Puerto Rico | 23.181.240.0 - 23.181.240.255 | 256 | 2024-04-19 | allocated |
| United States | 64.28.239.0 - 64.28.239.255 | 256 | 2024-04-19 | allocated |
| United States | 23.175.200.0 - 23.175.200.255 | 256 | 2024-04-19 | allocated |
| United States | 23.175.216.0 - 23.175.216.255 | 256 | 2024-04-19 | allocated |
| United States | 23.175.232.0 - 23.175.232.255 | 256 | 2024-04-19 | allocated |
| United States | 23.175.248.0 - 23.175.248.255 | 256 | 2024-04-19 | allocated |
| United States | 23.176.8.0 - 23.176.8.255 | 256 | 2024-04-19 | allocated |
| United States | 209.240.8.0 - 209.240.15.255 | 2048 | 2024-04-19 | allocated |
| United States | 216.83.172.0 - 216.83.173.255 | 512 | 2024-04-19 | allocated |
| United States | 23.154.9.0 - 23.154.9.255 | 256 | 2024-04-18 | allocated |
| United States | 23.175.120.0 - 23.175.120.255 | 256 | 2024-04-18 | allocated |
| United States | 23.175.136.0 - 23.175.136.255 | 256 | 2024-04-18 | allocated |
| United States | 23.175.152.0 - 23.175.152.255 | 256 | 2024-04-18 | allocated |
| United States | 23.175.168.0 - 23.175.168.255 | 256 | 2024-04-18 | allocated |
| United States | 23.175.184.0 - 23.175.184.255 | 256 | 2024-04-18 | allocated |
| United States | 23.175.72.0 - 23.175.72.255 | 256 | 2024-04-17 | allocated |
| United States | 204.15.34.0 - 204.15.35.255 | 512 | 2024-04-17 | allocated |
| United States | 23.175.104.0 - 23.175.104.255 | 256 | 2024-04-17 | allocated |
| United States | 23.175.56.0 - 23.175.56.255 | 256 | 2024-04-17 | allocated |
| United States | 67.217.248.0 - 67.217.248.255 | 256 | 2024-04-17 | allocated |
| United States | 23.175.88.0 - 23.175.88.255 | 256 | 2024-04-17 | allocated |
| United States | 108.171.32.0 - 108.171.63.255 | 8192 | 2024-04-17 | allocated |
| United States | 216.114.76.0 - 216.114.76.255 | 256 | 2024-04-17 | allocated |
| United States | 204.195.192.0 - 204.195.255.255 | 16384 | 2024-04-17 | allocated |
| United States | 216.181.20.0 - 216.181.20.255 | 256 | 2024-04-17 | allocated |
| Bahamas | 216.181.104.0 - 216.181.105.255 | 512 | 2024-04-17 | allocated |
| United States | 23.175.40.0 - 23.175.40.255 | 256 | 2024-04-16 | allocated |
| United States | 206.183.144.0 - 206.183.147.255 | 1024 | 2024-04-15 | allocated |
| United States | 67.217.250.0 - 67.217.250.255 | 256 | 2024-04-15 | allocated |
| United States | 199.89.8.0 - 199.89.15.255 | 2048 | 2024-04-15 | allocated |
| United States | 209.135.184.0 - 209.135.187.255 | 1024 | 2024-04-15 | allocated |
Address pool by prefix
| Prefix | Number of free block | |
|---|---|---|
| /20 | 1 | 216.40.80.0 |
| /21 | 1 | 216.40.72.0 |
| /22 | 2 | 23.154.12.0, 216.40.68.0 |
| /23 | 2 | 23.154.10.0, 216.40.66.0 |
| /24 | 4 | 23.135.225.0, 23.151.160.0, 23.154.233.0, 23.155.163.0 |
Address pool by range
- 23.135.225.0 - 23.135.225.255 (256 addresses).
- 23.151.160.0 - 23.151.160.255 (256 addresses).
- 23.154.10.0 - 23.154.15.255 (1536 addresses).
- 23.154.233.0 - 23.154.233.255 (256 addresses).
- 23.155.163.0 - 23.155.163.255 (256 addresses).
- 216.40.66.0 - 216.40.95.255 (7680 addresses).