Created
February 25, 2025 08:54
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All possible public (non private or reserved) IPv4 ranges in CIDR notion format
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| 1.0.0.0/8 | |
| 2.0.0.0/7 | |
| 4.0.0.0/6 | |
| 8.0.0.0/7 | |
| 11.0.0.0/8 | |
| 12.0.0.0/6 | |
| 16.0.0.0/4 | |
| 32.0.0.0/3 | |
| 64.0.0.0/3 | |
| 96.0.0.0/6 | |
| 100.0.0.0/10 | |
| 100.128.0.0/9 | |
| 101.0.0.0/8 | |
| 102.0.0.0/7 | |
| 104.0.0.0/5 | |
| 112.0.0.0/5 | |
| 120.0.0.0/6 | |
| 124.0.0.0/7 | |
| 126.0.0.0/8 | |
| 128.0.0.0/3 | |
| 160.0.0.0/5 | |
| 168.0.0.0/8 | |
| 169.0.0.0/9 | |
| 169.128.0.0/10 | |
| 169.192.0.0/11 | |
| 169.224.0.0/12 | |
| 169.240.0.0/13 | |
| 169.248.0.0/14 | |
| 169.252.0.0/15 | |
| 169.255.0.0/16 | |
| 170.0.0.0/7 | |
| 172.0.0.0/12 | |
| 172.32.0.0/11 | |
| 172.64.0.0/10 | |
| 172.128.0.0/9 | |
| 173.0.0.0/8 | |
| 174.0.0.0/7 | |
| 176.0.0.0/4 | |
| 192.0.1.0/24 | |
| 192.0.3.0/24 | |
| 192.0.4.0/22 | |
| 192.0.8.0/21 | |
| 192.0.16.0/20 | |
| 192.0.32.0/19 | |
| 192.0.64.0/18 | |
| 192.0.128.0/17 | |
| 192.1.0.0/16 | |
| 192.2.0.0/15 | |
| 192.4.0.0/14 | |
| 192.8.0.0/13 | |
| 192.16.0.0/12 | |
| 192.32.0.0/11 | |
| 192.64.0.0/12 | |
| 192.80.0.0/13 | |
| 192.88.0.0/18 | |
| 192.88.64.0/19 | |
| 192.88.96.0/24 | |
| 192.88.97.0/24 | |
| 192.88.98.0/24 | |
| 192.88.100.0/22 | |
| 192.88.104.0/21 | |
| 192.88.112.0/20 | |
| 192.88.128.0/17 | |
| 192.89.0.0/16 | |
| 192.90.0.0/15 | |
| 192.92.0.0/14 | |
| 192.96.0.0/11 | |
| 192.128.0.0/11 | |
| 192.160.0.0/13 | |
| 192.169.0.0/16 | |
| 192.170.0.0/15 | |
| 192.172.0.0/14 | |
| 192.176.0.0/12 | |
| 192.192.0.0/11 | |
| 192.224.0.0/12 | |
| 192.240.0.0/13 | |
| 192.248.0.0/14 | |
| 192.252.0.0/15 | |
| 192.254.0.0/16 | |
| 192.255.0.0/16 | |
| 193.0.0.0/8 | |
| 194.0.0.0/7 | |
| 196.0.0.0/7 | |
| 198.0.0.0/12 | |
| 198.16.0.0/15 | |
| 198.20.0.0/14 | |
| 198.24.0.0/13 | |
| 198.32.0.0/12 | |
| 198.48.0.0/15 | |
| 198.50.0.0/16 | |
| 198.51.0.0/18 | |
| 198.51.64.0/19 | |
| 198.51.96.0/22 | |
| 198.51.101.0/24 | |
| 198.51.102.0/23 | |
| 198.51.104.0/21 | |
| 198.51.112.0/20 | |
| 198.51.128.0/17 | |
| 198.52.0.0/14 | |
| 198.56.0.0/13 | |
| 198.64.0.0/10 | |
| 198.128.0.0/9 | |
| 199.0.0.0/8 | |
| 200.0.0.0/7 | |
| 202.0.0.0/8 | |
| 203.0.0.0/18 | |
| 203.0.64.0/19 | |
| 203.0.96.0/20 | |
| 203.0.112.0/24 | |
| 203.0.114.0/23 | |
| 203.0.116.0/22 | |
| 203.0.120.0/21 | |
| 203.0.128.0/17 | |
| 203.1.0.0/16 | |
| 203.2.0.0/15 | |
| 203.4.0.0/14 | |
| 203.8.0.0/13 | |
| 203.16.0.0/12 | |
| 203.32.0.0/11 | |
| 203.64.0.0/10 | |
| 203.128.0.0/9 | |
| 204.0.0.0/6 | |
| 208.0.0.0/4 |
For example, you can use this list to block all outgoing network traffic access in your firewall and ONLY allow access to publicly accessible internet resources while blocking all private and reserved IP networks. It can be also used for custom routing, proxy, VPN rules and for whatever else niche case you might need it for.
This list completely excludes all private/reserved /8 ranges:
0.0.0.0/8
10.0.0.0/8
127.0.0.0/8
224.0.0.0/8 (and everything above)
and fragments and partially excludes mixed public and private/reserved /8 ranges:
100.0.0.0/8
169.0.0.0/8
172.0.0.0/8
192.0.0.0/8
198.0.0.0/8
203.0.0.0/8
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If you are interested in similar list of public IPv6 ranges, it's just
2000::/3, nothing else to include, exclude or fragment.