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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
85,356 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 212.192.176.0/20 | 4.1k | RIPE NCC |  RU | 15th Jan 1998 |
| 212.192.238.0/23 | 512 | RIPE NCC | RU | 15th Jan 1998 |
| 212.192.248.0/23 | 512 | RIPE NCC | RU | 15th Jan 1998 |
| 212.192.96.0/20 | 4.1k | RIPE NCC | RU | 15th Jan 1998 |
| 212.193.192.0/19 | 8.2k | RIPE NCC | RU | 12th May 1999 |
| 212.193.224.0/19 | 8.2k | RIPE NCC | RU | 12th May 1999 |
| 212.2.232.0/24 | 256 | RIPE NCC |  KG | 28th Aug 2008 |
| 212.2.233.0/24 | 256 | RIPE NCC | KG | 28th Aug 2008 |
| 212.2.40.0/22 | 1k | RIPE NCC |  IT | 23rd Feb 1999 |
| 212.2.44.0/22 | 1k | RIPE NCC |  DE | 23rd Feb 1999 |
| 212.2.48.0/20 | 4.1k | RIPE NCC | DE | 23rd Feb 1999 |
| 212.21.100.0/24 | 256 | RIPE NCC |  TR | 7th Sept 1999 |
| 212.21.104.0/21 | 2k | RIPE NCC |  GB | 7th Sept 1999 |
| 212.21.112.0/21 | 2k | RIPE NCC | GB | 7th Sept 1999 |
| 212.21.120.0/22 | 1k | RIPE NCC | GB | 7th Sept 1999 |
| 212.21.124.0/23 | 512 | RIPE NCC | GB | 7th Sept 1999 |
| 212.21.127.0/24 | 256 | RIPE NCC | GB | 7th Sept 1999 |
| 212.211.0.0/17 | 32.8k | RIPE NCC |  NL | 21st Jul 1998 |
| 212.22.32.0/19 | 8.2k | RIPE NCC |  ES | 25th Feb 1999 |
| 212.224.48.0/20 | 4.1k | ARIN |  US | 3rd Jun 2024 |
| 212.225.0.0/19 | 8.2k | RIPE NCC | GB | 24th Aug 1998 |
| 212.225.32.0/19 | 8.2k | RIPE NCC | GB | 7th Apr 1999 |
| 212.225.64.0/18 | 16.4k | RIPE NCC | GB | 7th Apr 1999 |
| 212.23.193.0/24 | 256 | RIPE NCC | GB | 4th Nov 2021 |
| 212.23.210.0/24 | 256 | RIPE NCC |  CY | 4th Nov 2021 |
| 212.237.192.0/21 | 2k | RIPE NCC |  SE | 25th Sept 1998 |
| 212.237.212.0/22 | 1k | RIPE NCC | GB | 25th Sept 1998 |
| 212.237.96.0/20 | 4.1k | RIPE NCC |  DK | 25th Sept 1998 |
| 212.24.122.0/24 | 256 | RIPE NCC |  FR | 17th Sept 2021 |
| 212.24.124.0/24 | 256 | RIPE NCC |  BG | 17th Sept 2021 |
| 212.248.128.0/17 | 32.8k | RIPE NCC | GB | 4th Dec 2000 |
| 212.25.224.0/19 | 8.2k | RIPE NCC | SE | 20th Oct 1999 |
| 212.29.29.0/24 | 256 | RIPE NCC | DE | 27th Mar 1998 |
| 212.32.28.0/24 | 256 | RIPE NCC | GB | 3rd Feb 1998 |
| 212.32.30.0/23 | 512 | APNIC |  NP | 3rd Feb 1998 |
| 212.32.40.0/23 | 512 | APNIC | NP | 3rd Feb 1998 |
| 212.32.44.0/24 | 256 | RIPE NCC | GB | 3rd Feb 1998 |
| 212.32.46.0/23 | 512 | APNIC | NP | 3rd Feb 1998 |
| 212.32.52.0/23 | 512 | APNIC | NP | 3rd Feb 1998 |
| 212.32.54.0/24 | 256 | RIPE NCC |  IL | 3rd Feb 1998 |
| 212.38.128.0/19 | 8.2k | RIPE NCC |  SA | 11th May 1998 |
| 212.40.160.0/24 | 256 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.161.0/24 | 256 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.162.0/23 | 512 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.164.0/23 | 512 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.166.0/24 | 256 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.167.0/24 | 256 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.169.0/24 | 256 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.170.0/23 | 512 | RIPE NCC | DE | 19th Mar 1999 |
| 212.40.172.0/23 | 512 | RIPE NCC | DE | 19th Mar 1999 |