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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
25,269 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 91.218.242.0/23 | 512 | RIPE NCC |  PL | 23rd Aug 2010 |
| 91.219.118.0/24 | 256 | RIPE NCC |  GB | 6th May 2026 |
| 91.219.124.0/22 | 1k | RIPE NCC |  RU | 11th Oct 2010 |
| 91.219.192.0/22 | 1k | RIPE NCC | RU | 21st Oct 2010 |
| 91.219.216.0/22 | 1k | RIPE NCC |  SE | 25th Oct 2010 |
| 91.219.28.0/22 | 1k | RIPE NCC |  SK | 6th Sept 2010 |
| 91.219.36.0/22 | 1k | RIPE NCC | RU | 10th Sept 2010 |
| 91.220.0.0/24 | 256 | RIPE NCC |  IR | 11th Aug 2025 |
| 91.220.110.0/24 | 256 | RIPE NCC |  IS | 9th Nov 2011 |
| 91.220.121.0/24 | 256 | RIPE NCC |  RO | 9th Nov 2010 |
| 91.220.136.0/24 | 256 | RIPE NCC |  BE | 11th Nov 2010 |
| 91.220.144.0/24 | 256 | RIPE NCC |  MD | 12th Nov 2010 |
| 91.220.153.0/24 | 256 | RIPE NCC |  NL | 17th Nov 2010 |
| 91.220.154.0/24 | 256 | RIPE NCC | BE | 17th Nov 2010 |
| 91.220.16.0/24 | 256 | RIPE NCC |  DE | 2nd Jun 2026 |
| 91.220.167.0/24 | 256 | RIPE NCC | RO | 23rd Nov 2010 |
| 91.220.177.0/24 | 256 | RIPE NCC | PL | 25th Nov 2010 |
| 91.220.188.0/24 | 256 | RIPE NCC | RU | 30th Nov 2010 |
| 91.220.191.0/24 | 256 | RIPE NCC | BE | 30th Nov 2010 |
| 91.220.194.0/24 | 256 | RIPE NCC |  SI | 2nd Dec 2010 |
| 91.220.195.0/24 | 256 | RIPE NCC |  JO | 2nd Dec 2010 |
| 91.220.209.0/24 | 256 | RIPE NCC |  LT | 7th Dec 2010 |
| 91.220.224.0/24 | 256 | RIPE NCC |  IE | 10th Dec 2010 |
| 91.220.225.0/24 | 256 | RIPE NCC | PL | 10th Dec 2010 |
| 91.220.227.0/24 | 256 | RIPE NCC | SE | 10th Dec 2010 |
| 91.220.236.0/24 | 256 | RIPE NCC |  GR | 13th Dec 2010 |
| 91.220.242.0/24 | 256 | RIPE NCC |  TR | 14th Dec 2010 |
| 91.220.245.0/24 | 256 | RIPE NCC |  FR | 16th Dec 2010 |
| 91.220.252.0/24 | 256 | RIPE NCC | LT | 30th Dec 2024 |
| 91.220.255.0/24 | 256 | RIPE NCC |  UA | 17th Dec 2010 |
| 91.220.30.0/24 | 256 | RIPE NCC | NL | 5th Sept 2022 |
| 91.220.32.0/24 | 256 | RIPE NCC | PL | 14th Oct 2010 |
| 91.220.36.0/24 | 256 | RIPE NCC | DE | 18th Oct 2010 |
| 91.220.46.0/24 | 256 | RIPE NCC | RU | 19th Oct 2010 |
| 91.220.47.0/24 | 256 | RIPE NCC | SE | 19th Oct 2010 |
| 91.220.49.0/24 | 256 | RIPE NCC | DE | 19th Oct 2010 |
| 91.220.6.0/24 | 256 | RIPE NCC | NL | 6th Oct 2010 |
| 91.220.64.0/24 | 256 | RIPE NCC |  CH | 22nd Oct 2010 |
| 91.220.67.0/24 | 256 | RIPE NCC | DE | 12th May 2025 |
| 91.220.72.0/24 | 256 | RIPE NCC | RO | 25th Oct 2010 |
| 91.220.9.0/24 | 256 | RIPE NCC |  ES | 7th Oct 2010 |
| 91.220.91.0/24 | 256 | RIPE NCC | UA | 29th Oct 2010 |
| 91.220.92.0/24 | 256 | RIPE NCC | RU | 1st Nov 2010 |
| 91.220.94.0/24 | 256 | RIPE NCC |  SA | 16th Jun 2026 |
| 91.220.95.0/24 | 256 | RIPE NCC |  MK | 1st Nov 2010 |
| 91.220.96.0/24 | 256 | RIPE NCC | RO | 1st Nov 2010 |
| 91.221.10.0/23 | 512 | RIPE NCC | DE | 14th Oct 2010 |
| 91.221.14.0/23 | 512 | RIPE NCC | UA | 14th Oct 2010 |
| 91.221.154.0/23 | 512 | RIPE NCC | UA | 3rd Dec 2010 |
| 91.221.158.0/23 | 512 | RIPE NCC | PL | 6th Dec 2010 |