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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,283 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 193.161.1.0/24 | 256 | RIPE NCC | VG | 18th Nov 2019 |
| 193.161.116.0/22 | 1k | RIPE NCC |  IT | 18th Jul 2018 |
| 193.161.138.0/23 | 512 | RIPE NCC | NO | 25th Nov 1993 |
| 193.161.146.0/24 | 256 | RIPE NCC | NO | 17th Mar 1998 |
| 193.161.147.0/24 | 256 | RIPE NCC | VG | 18th Nov 2019 |
| 193.161.152.0/23 | 512 | RIPE NCC | NO | 21st Feb 1994 |
| 193.161.154.0/23 | 512 | RIPE NCC | NO | 21st Feb 1994 |
| 193.161.158.0/23 | 512 | RIPE NCC | NO | 27th Jul 1995 |
| 193.161.194.0/23 | 512 | RIPE NCC | NO | 15th Mar 1994 |
| 193.161.201.0/24 | 256 | RIPE NCC |  HU | 15th Jan 2024 |
| 193.161.207.0/24 | 256 | RIPE NCC | NO | 23rd Jun 1994 |
| 193.161.224.0/21 | 2k | RIPE NCC | NO | 23rd Jun 1994 |
| 193.161.236.0/22 | 1k | RIPE NCC |  SE | 3rd Oct 1994 |
| 193.161.24.0/23 | 512 | RIPE NCC |  CY | 14th Oct 2019 |
| 193.161.240.0/22 | 1k | RIPE NCC | CH | 2nd Mar 1995 |
| 193.161.244.0/24 | 256 | RIPE NCC | CH | 2nd Mar 1995 |
| 193.161.252.0/24 | 256 | RIPE NCC | NO | 15th Nov 1994 |
| 193.161.253.0/24 | 256 | RIPE NCC | NO | 30th Aug 1994 |
| 193.161.26.0/24 | 256 | RIPE NCC | VG | 18th Nov 2019 |
| 193.161.27.0/24 | 256 | RIPE NCC | NO | 12th Nov 1993 |
| 193.161.28.0/23 | 512 | RIPE NCC | CY | 14th Oct 2019 |
| 193.162.0.0/24 | 256 | RIPE NCC |  DK | 1st Sept 1993 |