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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,296 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.35.30.0/24 | 256 | RIPE NCC |  GB | 16th Mar 1994 |
| 194.35.31.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.60.0/22 | 1k | RIPE NCC |  UA | 30th Oct 2018 |
| 194.35.64.0/21 | 2k | RIPE NCC |  NO | 19th Apr 1994 |
| 194.35.76.0/23 | 512 | RIPE NCC |  IT | 22nd Oct 2019 |
| 194.35.79.0/24 | 256 | RIPE NCC | GB | 4th May 1994 |
| 194.35.82.0/23 | 512 | RIPE NCC |  SE | 4th May 1994 |
| 194.35.94.0/24 | 256 | RIPE NCC | GB | 13th May 1994 |
| 194.36.12.0/22 | 1k | RIPE NCC | GB | 10th Jan 1995 |
| 194.36.172.0/22 | 1k | RIPE NCC |  IR | 16th May 2018 |
| 194.36.189.0/24 | 256 | RIPE NCC |  NL | 20th Sept 2018 |
| 194.36.208.0/24 | 256 | RIPE NCC |  RU | 22nd Oct 2019 |
| 194.36.209.0/24 | 256 | RIPE NCC | RU | 22nd Oct 2019 |
| 194.36.21.0/24 | 256 | RIPE NCC | GB | 9th Nov 2006 |
| 194.36.210.0/23 | 512 | RIPE NCC |  FI | 16th Mar 1995 |
| 194.36.212.0/22 | 1k | RIPE NCC | GB | 15th Mar 1995 |
| 194.36.216.0/22 | 1k | RIPE NCC | GB | 16th Mar 1995 |
| 194.36.22.0/24 | 256 | RIPE NCC |  FR | 10th Nov 2006 |
| 194.36.23.0/24 | 256 | RIPE NCC | GB | 10th Nov 2006 |
| 194.36.248.0/21 | 2k | RIPE NCC | GB | 6th Apr 1995 |
| 194.36.4.0/22 | 1k | RIPE NCC | GB | 10th Jan 1995 |
| 194.36.66.0/23 | 512 | RIPE NCC | GB | 3rd Feb 1995 |
| 194.36.76.0/23 | 512 | RIPE NCC | GB | 8th Feb 1995 |
| 194.36.78.0/24 | 256 | RIPE NCC | GB | 8th Feb 1995 |
| 194.36.79.0/24 | 256 | RIPE NCC | GB | 8th Feb 1995 |
| 194.37.112.0/20 | 4.1k | RIPE NCC |  AT | 8th Mar 1994 |
| 194.37.128.0/18 | 16.4k | RIPE NCC | AT | 8th Mar 1994 |
| 194.37.16.0/20 | 4.1k | RIPE NCC | AT | 2nd May 2002 |
| 194.37.192.0/19 | 8.2k | RIPE NCC | AT | 8th Mar 1994 |
| 194.37.224.0/21 | 2k | RIPE NCC | AT | 8th Mar 1994 |
| 194.37.232.0/21 | 2k | RIPE NCC | AT | 10th Mar 1994 |
| 194.37.32.0/20 | 4.1k | RIPE NCC | AT | 2nd May 2002 |
| 194.37.48.0/21 | 2k | RIPE NCC | AT | 2nd May 2002 |
| 194.37.68.0/22 | 1k | RIPE NCC | NL | 14th Feb 1994 |
| 194.37.84.0/22 | 1k | RIPE NCC |  DE | 31st Aug 1994 |
| 194.38.28.0/22 | 1k | RIPE NCC |  BZ | 29th Nov 2018 |
| 194.38.60.0/22 | 1k | RIPE NCC | IT | 29th Nov 2018 |
| 194.39.0.0/20 | 4.1k | RIPE NCC | DE | 24th Feb 1994 |
| 194.39.100.0/24 | 256 | RIPE NCC | DE | 21st Mar 1994 |
| 194.39.120.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.39.136.0/22 | 1k | RIPE NCC | DE | 25th May 1994 |
| 194.39.142.0/24 | 256 | RIPE NCC | DE | 21st Nov 2019 |
| 194.39.151.0/24 | 256 | RIPE NCC | DE | 23rd Feb 1994 |
| 194.39.152.0/23 | 512 | RIPE NCC | DE | 21st Feb 1994 |
| 194.39.154.0/24 | 256 | RIPE NCC | DE | 21st Feb 1994 |
| 194.39.155.0/24 | 256 | RIPE NCC | DE | 18th Feb 1994 |
| 194.39.156.0/24 | 256 | RIPE NCC | DE | 18th Feb 1994 |
| 194.39.157.0/24 | 256 | RIPE NCC | DE | 21st Nov 2019 |
| 194.39.158.0/23 | 512 | RIPE NCC | DE | 18th Feb 1994 |
| 194.39.16.0/21 | 2k | RIPE NCC | DE | 24th Feb 1994 |