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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.53.110.0/23 | 512 | RIPE NCC |  DE | 18th Apr 1994 |
| 193.53.14.0/24 | 256 | RIPE NCC |  BE | 18th Apr 1994 |
| 193.53.15.0/24 | 256 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.164.0/22 | 1k | RIPE NCC |  GB | 17th Jul 2018 |
| 193.53.170.0/23 | 512 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.192.0/21 | 2k | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.20.0/23 | 512 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.240.0/22 | 1k | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.244.0/24 | 256 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.32.0/23 | 512 | RIPE NCC |  SE | 18th Apr 1994 |
| 193.53.35.0/24 | 256 | RIPE NCC | SE | 14th Nov 2019 |
| 193.53.38.0/24 | 256 | RIPE NCC |  FR | 18th Apr 1994 |
| 193.53.39.0/24 | 256 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.42.0/23 | 512 | RIPE NCC | SE | 18th Apr 1994 |
| 193.53.44.0/24 | 256 | RIPE NCC | SE | 18th Apr 1994 |
| 193.53.45.0/24 | 256 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.46.0/24 | 256 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.47.0/24 | 256 | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.6.0/24 | 256 | RIPE NCC | GB | 18th Apr 1994 |
| 193.53.64.0/20 | 4.1k | RIPE NCC | BE | 18th Apr 1994 |
| 193.53.82.0/24 | 256 | RIPE NCC | SE | 14th Nov 2019 |
| 193.53.84.0/24 | 256 | RIPE NCC | SE | 25th Feb 2009 |
| 193.53.94.0/23 | 512 | RIPE NCC | GB | 18th Apr 1994 |
| 193.56.100.0/24 | 256 | RIPE NCC | FR | 12th Oct 1992 |
| 193.56.101.0/24 | 256 | RIPE NCC | FR | 12th Oct 1992 |
| 193.56.102.0/24 | 256 | RIPE NCC | FR | 12th Oct 1992 |
| 193.56.104.0/23 | 512 | RIPE NCC |  PL | 10th Oct 2019 |
| 193.56.115.0/24 | 256 | RIPE NCC | FR | 10th Jun 1994 |
| 193.56.119.0/24 | 256 | RIPE NCC | FR | 25th Mar 1994 |
| 193.56.120.0/24 | 256 | RIPE NCC |  KZ | 22nd Jun 2026 |
| 193.56.121.0/24 | 256 | RIPE NCC |  EE | 22nd Jun 2026 |
| 193.56.122.0/24 | 256 | RIPE NCC | EE | 22nd Jun 2026 |
| 193.56.123.0/24 | 256 | RIPE NCC |  FI | 22nd Jun 2026 |
| 193.56.128.0/24 | 256 | RIPE NCC | FR | 3rd Nov 1992 |
| 193.56.158.0/23 | 512 | RIPE NCC | DE | 10th Oct 2019 |
| 193.56.162.0/23 | 512 | RIPE NCC | DE | 10th Oct 2019 |
| 193.56.183.0/24 | 256 | RIPE NCC |  IT | 17th Dec 2025 |
| 193.56.187.0/24 | 256 | RIPE NCC | FR | 19th Apr 1994 |
| 193.56.188.0/24 | 256 | RIPE NCC |  RU | 15th Nov 2019 |
| 193.56.189.0/24 | 256 | RIPE NCC | FR | 19th Apr 1994 |
| 193.56.190.0/24 | 256 | RIPE NCC | RU | 15th Nov 2019 |
| 193.56.191.0/24 | 256 | RIPE NCC | FR | 19th Apr 1994 |
| 193.56.210.0/24 | 256 | RIPE NCC | FR | 18th Nov 1993 |
| 193.56.225.0/24 | 256 | RIPE NCC | FR | 26th Apr 1994 |
| 193.56.228.0/24 | 256 | RIPE NCC | FR | 25th May 1993 |
| 193.56.229.0/24 | 256 | RIPE NCC | FR | 25th May 1993 |
| 193.56.30.0/24 | 256 | RIPE NCC | RU | 4th Jul 2025 |
| 193.56.31.0/24 | 256 | RIPE NCC | BE | 4th Jul 2025 |
| 193.56.34.0/24 | 256 | RIPE NCC | FR | 27th Aug 1992 |
| 193.56.42.0/24 | 256 | RIPE NCC | FR | 27th Aug 1992 |