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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.151.246.0/24 | 256 | RIPE NCC |  ES | 5th Feb 2024 |
| 193.151.247.0/24 | 256 | RIPE NCC |  KZ | 20th May 2026 |
| 193.151.248.0/22 | 1k | RIPE NCC |  DE | 29th Mar 2005 |
| 193.151.44.0/23 | 512 | RIPE NCC | DE | 16th Apr 2004 |
| 193.151.64.0/22 | 1k | RIPE NCC |  PL | 26th Apr 2004 |
| 193.151.8.0/22 | 1k | RIPE NCC | PL | 6th Apr 2004 |
| 193.16.1.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.100.0/24 | 256 | RIPE NCC |  NO | 1st Jun 2004 |
| 193.16.108.0/24 | 256 | RIPE NCC |  GB | 8th Jun 2004 |
| 193.16.12.0/22 | 1k | RIPE NCC |  CZ | 6th Jul 2018 |
| 193.16.157.0/24 | 256 | RIPE NCC |  BA | 12th Nov 2024 |
| 193.16.184.0/23 | 512 | RIPE NCC | DE | 7th Mar 1995 |
| 193.16.212.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.214.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.219.0/24 | 256 | RIPE NCC |  GR | 20th Jan 2004 |
| 193.16.222.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.228.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.230.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.238.0/24 | 256 | RIPE NCC |  IL | 6th Aug 2010 |
| 193.16.248.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.249.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.250.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.252.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.254.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.32.0/22 | 1k | RIPE NCC |  EE | 23rd May 2019 |
| 193.16.44.0/24 | 256 | RIPE NCC |  CH | 5th Nov 2003 |
| 193.16.64.0/21 | 2k | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.8.0/22 | 1k | RIPE NCC |  AT | 6th Jul 2018 |
| 193.160.0.0/24 | 256 | RIPE NCC |  FR | 13th Jul 2010 |
| 193.160.103.0/24 | 256 | RIPE NCC | FR | 15th Mar 1995 |
| 193.160.112.0/24 | 256 | RIPE NCC | NO | 5th Apr 1995 |
| 193.160.116.0/23 | 512 | RIPE NCC | NO | 28th Jun 1995 |
| 193.160.12.0/23 | 512 | RIPE NCC |  RU | 6th Jul 2010 |
| 193.160.124.0/23 | 512 | RIPE NCC | CH | 15th May 1995 |
| 193.160.126.0/23 | 512 | RIPE NCC | NO | 1st Jun 1995 |
| 193.160.132.0/23 | 512 | RIPE NCC | NO | 16th Mar 1993 |
| 193.160.137.0/24 | 256 | RIPE NCC | NO | 23rd Mar 1993 |
| 193.160.139.0/24 | 256 | RIPE NCC | DE | 18th Nov 2019 |
| 193.160.140.0/22 | 1k | RIPE NCC |  TR | 7th May 2018 |
| 193.160.153.0/24 | 256 | RIPE NCC |  BE | 7th May 2018 |
| 193.160.158.0/24 | 256 | RIPE NCC | RU | 10th Oct 2011 |
| 193.160.159.0/24 | 256 | RIPE NCC | DE | 18th Nov 2019 |
| 193.160.212.0/22 | 1k | RIPE NCC | AT | 14th Sept 2018 |
| 193.160.232.0/22 | 1k | RIPE NCC | GB | 7th May 2018 |
| 193.160.238.0/24 | 256 | RIPE NCC | DE | 18th Nov 2019 |
| 193.160.248.0/22 | 1k | RIPE NCC | GB | 8th May 1995 |
| 193.160.253.0/24 | 256 | RIPE NCC | DE | 18th Nov 2019 |
| 193.160.254.0/24 | 256 | RIPE NCC |  VG | 18th Nov 2019 |
| 193.160.29.0/24 | 256 | RIPE NCC | NO | 25th Nov 1994 |
| 193.160.56.0/21 | 2k | RIPE NCC | NO | 11th Mar 1993 |