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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.60.247.0/24 | 256 | RIPE NCC |  RU | 4th Nov 2011 |
| 194.60.248.0/23 | 512 | RIPE NCC | RU | 4th Nov 2011 |
| 194.60.70.0/24 | 256 | RIPE NCC |  CH | 1st Nov 2006 |
| 194.61.144.0/21 | 2k | RIPE NCC |  GB | 24th Aug 1994 |
| 194.61.20.0/22 | 1k | RIPE NCC |  MT | 31st Oct 2018 |
| 194.61.240.0/22 | 1k | RIPE NCC |  NL | 14th May 1998 |
| 194.61.244.0/23 | 512 | RIPE NCC | NL | 14th May 1998 |
| 194.61.246.0/24 | 256 | RIPE NCC | NL | 14th May 1998 |
| 194.61.250.0/24 | 256 | RIPE NCC | GB | 14th May 1998 |
| 194.61.252.0/22 | 1k | RIPE NCC | NL | 14th May 1998 |
| 194.61.26.0/24 | 256 | RIPE NCC |  DE | 17th Aug 2023 |
| 194.61.4.0/22 | 1k | RIPE NCC | NL | 31st Oct 2018 |
| 194.61.57.0/24 | 256 | RIPE NCC |  PL | 16th May 2012 |
| 194.61.78.0/24 | 256 | RIPE NCC | GB | 2nd Aug 1994 |
| 194.61.94.0/24 | 256 | RIPE NCC | GB | 5th Aug 1994 |
| 194.61.95.0/24 | 256 | RIPE NCC |  NO | 24th Aug 1994 |
| 194.62.100.0/23 | 512 | RIPE NCC | NO | 9th Nov 1994 |
| 194.62.102.0/24 | 256 | RIPE NCC | GB | 9th Nov 1994 |
| 194.62.103.0/24 | 256 | RIPE NCC | DE | 9th Nov 1994 |
| 194.62.108.0/22 | 1k | RIPE NCC |  UZ | 31st Jul 2018 |
| 194.62.115.0/24 | 256 | RIPE NCC |  ES | 25th Mar 2026 |
| 194.62.116.0/24 | 256 | RIPE NCC |  CZ | 25th Mar 2026 |
| 194.62.117.0/24 | 256 | RIPE NCC |  CY | 25th Mar 2026 |
| 194.62.120.0/23 | 512 | RIPE NCC |  FI | 9th Nov 1994 |
| 194.62.125.0/24 | 256 | RIPE NCC | GB | 15th Nov 1994 |
| 194.62.126.0/23 | 512 | RIPE NCC |  RO | 25th Oct 2019 |
| 194.62.144.0/22 | 1k | RIPE NCC | GB | 15th Nov 1994 |
| 194.62.156.0/24 | 256 | RIPE NCC |  IE | 23rd Nov 1994 |
| 194.62.162.0/24 | 256 | RIPE NCC | NL | 19th Jul 2021 |
| 194.62.172.0/24 | 256 | RIPE NCC | GB | 23rd Nov 1994 |
| 194.62.175.0/24 | 256 | RIPE NCC | GB | 30th Nov 1994 |
| 194.62.176.0/22 | 1k | RIPE NCC |  US | 29th Nov 1994 |
| 194.62.189.0/24 | 256 | RIPE NCC | GB | 14th Dec 1994 |
| 194.62.192.0/21 | 2k | RIPE NCC | GB | 7th Dec 1994 |
| 194.62.2.0/23 | 512 | RIPE NCC | RO | 25th Oct 2019 |
| 194.62.20.0/24 | 256 | RIPE NCC | DE | 22nd Sept 1994 |
| 194.62.204.0/22 | 1k | RIPE NCC | NO | 14th Dec 1994 |
| 194.62.21.0/24 | 256 | RIPE NCC | GB | 27th Sept 1994 |
| 194.62.212.0/23 | 512 | RIPE NCC | NO | 14th Dec 1994 |
| 194.62.22.0/24 | 256 | RIPE NCC | RO | 23rd Nov 2006 |
| 194.62.234.0/24 | 256 | RIPE NCC |  FR | 28th Nov 2006 |
| 194.62.235.0/24 | 256 | RIPE NCC | GB | 15th Dec 1994 |
| 194.62.236.0/24 | 256 | RIPE NCC | DE | 28th Nov 2006 |
| 194.62.24.0/22 | 1k | RIPE NCC | GB | 22nd Sept 1994 |
| 194.62.41.0/24 | 256 | RIPE NCC |  PT | 19th Jul 2021 |
| 194.62.42.0/24 | 256 | RIPE NCC |  MD | 19th Jul 2021 |
| 194.62.48.0/23 | 512 | RIPE NCC | CH | 7th Oct 1994 |
| 194.62.50.0/24 | 256 | RIPE NCC | CH | 7th Oct 1994 |
| 194.62.51.0/24 | 256 | RIPE NCC | CH | 7th Oct 1994 |
| 194.62.6.0/24 | 256 | RIPE NCC | NL | 22nd Nov 2019 |