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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,702 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 93.92.72.0/21 | 2k | RIPE NCC |  IT | 25th Jan 2008 |
| 93.93.200.0/24 | 256 | RIPE NCC |  ES | 23rd Aug 2021 |
| 93.93.203.0/24 | 256 | RIPE NCC |  NL | 23rd Aug 2021 |
| 93.93.204.0/24 | 256 | RIPE NCC |  IR | 23rd Aug 2021 |
| 93.93.96.0/21 | 2k | RIPE NCC |  NO | 15th Feb 2008 |
| 93.94.142.0/24 | 256 | RIPE NCC |  BG | 14th Mar 2008 |
| 93.94.168.0/21 | 2k | RIPE NCC |  SE | 18th Mar 2008 |
| 93.94.200.0/21 | 2k | RIPE NCC | NL | 19th Mar 2008 |
| 93.95.176.0/21 | 2k | RIPE NCC |  TR | 1st Apr 2008 |
| 93.95.215.0/24 | 256 | RIPE NCC |  DE | 16th Aug 2023 |
| 93.95.25.0/24 | 256 | RIPE NCC |  IS | 8th Mar 2023 |
| 93.95.29.0/24 | 256 | RIPE NCC |  RU | 8th Mar 2023 |
| 93.95.40.0/21 | 2k | RIPE NCC |  GB | 27th Mar 2008 |
| 93.95.48.0/21 | 2k | RIPE NCC |  BE | 10th Mar 2009 |
| 94.100.192.0/20 | 4.1k | RIPE NCC | RU | 1st Aug 2008 |
| 94.100.38.0/23 | 512 | RIPE NCC | IT | 9th Jul 2008 |
| 94.100.40.0/21 | 2k | RIPE NCC | IT | 9th Jul 2008 |
| 94.100.80.0/20 | 4.1k | RIPE NCC | RU | 22nd Jul 2008 |
| 94.101.101.0/24 | 256 | RIPE NCC | GB | 17th Aug 2023 |
| 94.101.105.0/24 | 256 | RIPE NCC | RU | 23rd Aug 2023 |
| 94.103.125.0/24 | 256 | RIPE NCC | GB | 27th Aug 2018 |
| 94.103.176.0/24 | 256 | RIPE NCC |  HR | 23rd Sept 2021 |
| 94.103.182.0/24 | 256 | RIPE NCC |  AE | 24th Sept 2021 |
| 94.103.184.0/24 | 256 | RIPE NCC | AE | 24th Sept 2021 |
| 94.103.189.0/24 | 256 | RIPE NCC |  SC | 24th Sept 2021 |
| 94.124.96.0/22 | 1k | ARIN |  US | 26th Mar 2024 |
| 94.125.0.0/21 | 2k | RIPE NCC | RU | 13th Aug 2008 |
| 94.125.190.0/24 | 256 | RIPE NCC | RU | 1st Sept 2008 |
| 94.125.32.0/21 | 2k | RIPE NCC | GB | 20th Aug 2008 |
| 94.126.104.0/21 | 2k | RIPE NCC | DE | 18th Sept 2008 |
| 94.126.120.0/21 | 2k | RIPE NCC |  LT | 19th Sept 2008 |
| 94.126.200.0/24 | 256 | RIPE NCC | RU | 1st Oct 2008 |
| 94.126.203.0/24 | 256 | RIPE NCC | RU | 1st Oct 2008 |
| 94.127.144.0/21 | 2k | RIPE NCC | RU | 14th Oct 2008 |
| 94.127.16.0/24 | 256 | RIPE NCC |  RO | 9th Jul 2026 |
| 94.127.19.0/24 | 256 | RIPE NCC | IT | 9th Jul 2026 |
| 94.127.21.0/24 | 256 | RIPE NCC |  AT | 9th Jul 2026 |
| 94.127.22.0/24 | 256 | RIPE NCC | TR | 9th Jul 2026 |
| 94.127.23.0/24 | 256 | RIPE NCC | HR | 9th Jul 2026 |
| 94.127.240.0/21 | 2k | RIPE NCC | RU | 17th Oct 2008 |
| 94.127.40.0/21 | 2k | RIPE NCC | IT | 7th Oct 2008 |
| 94.127.72.0/21 | 2k | RIPE NCC | NL | 8th Oct 2008 |
| 94.131.100.0/22 | 1k | RIPE NCC |  MD | 23rd Jun 2008 |
| 94.131.116.0/22 | 1k | RIPE NCC | MD | 23rd Jun 2008 |
| 94.131.2.0/23 | 512 | RIPE NCC | MD | 23rd Jun 2008 |
| 94.131.20.0/24 | 256 | RIPE NCC | MD | 23rd Jun 2008 |
| 94.131.53.0/24 | 256 | RIPE NCC |  PA | 23rd Jun 2008 |
| 94.131.59.0/24 | 256 | RIPE NCC | PA | 23rd Jun 2008 |
| 94.131.8.0/21 | 2k | RIPE NCC | MD | 23rd Jun 2008 |
| 94.131.96.0/22 | 1k | RIPE NCC | MD | 23rd Jun 2008 |