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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.42.55.64/26 | 64 | RIPE NCC |  CY | 14th Sept 2012 |
| 194.43.0.0/16 | 65.5k | RIPE NCC |  NO | 9th Apr 1996 |
| 194.45.127.0/24 | 256 | RIPE NCC |  DE | 28th Feb 1994 |
| 194.45.152.0/23 | 512 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.165.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.167.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.168.0/24 | 256 | RIPE NCC |  NL | 28th Feb 1994 |
| 194.45.182.0/23 | 512 | RIPE NCC |  US | 28th Feb 1994 |
| 194.45.200.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.217.0/24 | 256 | RIPE NCC |  IE | 21st Nov 2019 |
| 194.45.232.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.56.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.46.39.0/24 | 256 | RIPE NCC |  GB | 28th Feb 1994 |
| 194.46.40.0/23 | 512 | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.43.0/24 | 256 | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.48.0/21 | 2k | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.56.0/24 | 256 | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.61.0/24 | 256 | RIPE NCC | GB | 28th Feb 1994 |
| 194.48.0.0/24 | 256 | RIPE NCC |  FR | 21st Sept 2021 |
| 194.48.1.0/24 | 256 | RIPE NCC |  PL | 7th Aug 2023 |
| 194.48.100.0/22 | 1k | RIPE NCC |  CH | 26th Jul 2018 |
| 194.48.104.0/22 | 1k | RIPE NCC | CH | 17th May 2018 |
| 194.48.16.0/20 | 4.1k | RIPE NCC |  AT | 6th Jul 1999 |
| 194.48.194.0/23 | 512 | RIPE NCC | DE | 21st Sept 1994 |
| 194.48.196.0/24 | 256 | RIPE NCC |  AE | 19th Jun 2026 |
| 194.48.201.0/24 | 256 | RIPE NCC | CH | 3rd May 2023 |
| 194.48.202.0/24 | 256 | RIPE NCC |  BG | 3rd May 2023 |
| 194.48.204.0/24 | 256 | RIPE NCC | DE | 13th Oct 2021 |
| 194.48.208.0/24 | 256 | RIPE NCC |  CZ | 15th Jan 2008 |
| 194.48.219.0/24 | 256 | RIPE NCC | PL | 24th Jan 2008 |
| 194.48.224.0/22 | 1k | RIPE NCC | DE | 26th Jul 2018 |
| 194.48.240.0/24 | 256 | RIPE NCC | AT | 26th Jul 1994 |
| 194.48.243.0/24 | 256 | RIPE NCC | FR | 18th Jun 2026 |
| 194.48.254.0/24 | 256 | RIPE NCC |  IT | 18th Jun 2026 |
| 194.48.255.0/24 | 256 | RIPE NCC |  TR | 7th Mar 2023 |
| 194.48.3.0/24 | 256 | RIPE NCC | IE | 21st Nov 2019 |
| 194.48.8.0/21 | 2k | RIPE NCC | AT | 6th Jul 1999 |
| 194.49.108.0/23 | 512 | RIPE NCC | AT | 23rd Oct 2019 |
| 194.49.112.0/23 | 512 | RIPE NCC | AT | 23rd Oct 2019 |
| 194.49.114.0/24 | 256 | RIPE NCC | DE | 19th Apr 1994 |
| 194.49.122.0/23 | 512 | RIPE NCC |  RU | 12th Apr 2012 |
| 194.49.125.0/24 | 256 | RIPE NCC | DE | 19th Apr 1994 |
| 194.49.18.0/24 | 256 | RIPE NCC |  SI | 21st Nov 2019 |
| 194.49.23.0/24 | 256 | RIPE NCC | DE | 24th Mar 1994 |
| 194.49.32.0/21 | 2k | RIPE NCC | NL | 25th Mar 1994 |
| 194.49.6.0/24 | 256 | RIPE NCC | SI | 21st Nov 2019 |
| 194.49.62.0/23 | 512 | RIPE NCC | DE | 30th Mar 1994 |
| 194.49.70.0/24 | 256 | RIPE NCC | DE | 30th Mar 1994 |
| 194.5.133.0/24 | 256 | RIPE NCC | FR | 16th Jan 1995 |
| 194.5.136.0/21 | 2k | RIPE NCC | CH | 6th Jan 1995 |