Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
Browse by country
Countries with unannounced space registered through ARIN, largest first.
Unannounced blocks registered through ARIN
30,434 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 162.12.248.0/21 | 2k | ARIN |  US | 10th May 2012 |
| 162.120.20.0/24 | 256 | ARIN | US | 12th Jan 2023 |
| 162.120.40.0/22 | 1k | ARIN | US | 14th Mar 2025 |
| 162.120.44.0/22 | 1k | ARIN | US | 4th Aug 1992 |
| 162.120.48.0/22 | 1k | ARIN | US | 4th Aug 1992 |
| 162.120.72.0/23 | 512 | ARIN | US | 21st Jun 2023 |
| 162.120.80.0/22 | 1k | ARIN | US | 4th Aug 1992 |
| 162.124.0.0/16 | 65.5k | ARIN | US | 20th Nov 1992 |
| 162.142.122.0/24 | 256 | ARIN | US | 23rd Apr 2020 |
| 162.142.78.0/24 | 256 | ARIN | US | 5th Aug 2020 |
| 162.143.0.0/16 | 65.5k | ARIN | US | 11th Jan 1993 |
| 162.16.0.0/16 | 65.5k | ARIN | US | 5th Mar 1992 |
| 162.20.0.0/16 | 65.5k | ARIN | US | 9th Jul 1992 |
| 162.208.12.0/22 | 1k | ARIN |  CA | 25th Mar 2013 |
| 162.208.120.0/22 | 1k | ARIN | US | 11th Oct 2018 |
| 162.208.124.0/22 | 1k | ARIN | US | 17th Mar 2026 |
| 162.208.20.0/22 | 1k | ARIN | US | 25th Mar 2013 |
| 162.208.60.0/22 | 1k | ARIN | CA | 1st Apr 2013 |
| 162.210.120.0/21 | 2k | ARIN | US | 24th Apr 2013 |
| 162.210.208.0/22 | 1k | ARIN | US | 26th Apr 2013 |
| 162.210.212.0/24 | 256 | ARIN | US | 26th Apr 2013 |
| 162.210.214.0/23 | 512 | ARIN | US | 26th Apr 2013 |
| 162.210.32.0/22 | 1k | ARIN | CA | 16th Apr 2013 |
| 162.211.64.0/22 | 1k | ARIN | US | 3rd May 2013 |
| 162.212.0.0/22 | 1k | ARIN | US | 13th May 2013 |
| 162.212.192.0/22 | 1k | ARIN | US | 22nd May 2013 |
| 162.212.36.0/22 | 1k | ARIN | US | 21st Feb 2020 |
| 162.212.64.0/21 | 2k | ARIN | CA | 16th May 2013 |
| 162.213.48.0/21 | 2k | ARIN | US | 14th Jun 2018 |
| 162.213.76.0/22 | 1k | ARIN | US | 4th Jun 2013 |
| 162.216.168.0/21 | 2k | ARIN | US | 3rd Jul 2013 |
| 162.216.20.0/22 | 1k | ARIN | US | 19th Jun 2013 |
| 162.216.224.0/23 | 512 | ARIN | US | 10th Jul 2013 |
| 162.216.226.0/23 | 512 | ARIN | US | 28th Oct 2025 |
| 162.216.98.0/23 | 512 | ARIN | US | 19th Sept 2025 |
| 162.217.16.0/22 | 1k | ARIN | US | 15th Jul 2013 |
| 162.217.160.0/21 | 2k | ARIN | US | 22nd Jul 2013 |
| 162.217.56.0/24 | 256 | ARIN | US | 2nd Apr 2024 |
| 162.217.57.0/24 | 256 | ARIN | US | 2nd May 2024 |
| 162.217.59.0/24 | 256 | ARIN | US | 3rd May 2017 |
| 162.217.60.0/22 | 1k | ARIN | CA | 14th Apr 2017 |
| 162.218.156.0/24 | 256 | ARIN | US | 1st Feb 2022 |
| 162.218.159.0/24 | 256 | ARIN | US | 25th Feb 2022 |
| 162.218.32.0/21 | 2k | ARIN | CA | 31st Jul 2013 |
| 162.218.80.0/22 | 1k | ARIN | US | 12th Jul 2019 |
| 162.218.96.0/22 | 1k | ARIN | US | 2nd Aug 2013 |
| 162.220.112.0/22 | 1k | ARIN | US | 26th Aug 2013 |
| 162.220.228.0/22 | 1k | ARIN | US | 3rd Sept 2013 |
| 162.221.100.0/22 | 1k | ARIN | US | 17th Sept 2013 |
| 162.221.12.0/22 | 1k | ARIN | CA | 6th Sept 2013 |