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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.33.125.0/24 | 256 | RIPE NCC |  IR | 4th Jun 2012 |
| 194.33.126.0/23 | 512 | RIPE NCC | IR | 4th Jun 2012 |
| 194.33.144.0/22 | 1k | RIPE NCC |  NL | 12th May 1995 |
| 194.33.148.0/24 | 256 | RIPE NCC | NL | 12th May 1995 |
| 194.33.176.0/22 | 1k | RIPE NCC |  GB | 6th Jan 1994 |
| 194.33.185.0/24 | 256 | RIPE NCC |  PL | 6th Nov 2006 |
| 194.33.24.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.25.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.26.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.27.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.30.0/24 | 256 | RIPE NCC |  NO | 15th Dec 1993 |
| 194.33.31.0/24 | 256 | RIPE NCC | GB | 20th Jul 1994 |
| 194.33.33.0/24 | 256 | RIPE NCC | GB | 17th Dec 1993 |
| 194.33.60.0/24 | 256 | RIPE NCC | GB | 5th Jan 1994 |
| 194.34.108.0/22 | 1k | RIPE NCC | NL | 19th Sept 2018 |
| 194.34.112.0/20 | 4.1k | RIPE NCC | GB | 15th Feb 1994 |
| 194.34.13.0/24 | 256 | RIPE NCC |  FR | 8th Feb 1994 |
| 194.34.136.0/23 | 512 | RIPE NCC |  ES | 21st Oct 2019 |
| 194.34.14.0/23 | 512 | RIPE NCC | GB | 4th Feb 1994 |
| 194.34.140.0/22 | 1k | RIPE NCC |  CH | 15th Feb 1994 |
| 194.34.16.0/20 | 4.1k | RIPE NCC | NL | 12th May 1995 |
| 194.34.164.0/24 | 256 | RIPE NCC |  DE | 24th Jul 2025 |
| 194.34.165.0/24 | 256 | RIPE NCC | NL | 28th Jul 2025 |
| 194.34.192.0/22 | 1k | RIPE NCC | DE | 15th May 2018 |
| 194.34.216.0/22 | 1k | RIPE NCC | GB | 8th Mar 1994 |
| 194.34.220.0/23 | 512 | RIPE NCC | GB | 8th Mar 1994 |
| 194.34.222.0/24 | 256 | RIPE NCC | GB | 8th Mar 1994 |
| 194.34.223.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.34.32.0/22 | 1k | RIPE NCC | NL | 12th May 1995 |
| 194.34.36.0/22 | 1k | RIPE NCC | NL | 8th Feb 1994 |
| 194.34.40.0/21 | 2k | RIPE NCC | NL | 8th Feb 1994 |
| 194.34.48.0/21 | 2k | RIPE NCC | NL | 8th Feb 1994 |
| 194.34.60.0/23 | 512 | RIPE NCC |  FI | 8th Feb 1994 |
| 194.34.62.0/23 | 512 | RIPE NCC | ES | 21st Oct 2019 |
| 194.35.128.0/19 | 8.2k | RIPE NCC | GB | 25th Apr 1994 |
| 194.35.16.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.160.0/20 | 4.1k | RIPE NCC | GB | 4th May 1994 |
| 194.35.17.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.18.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.19.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.22.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.23.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.24.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.242.0/23 | 512 | RIPE NCC | DE | 8th Jun 1994 |
| 194.35.244.0/22 | 1k | RIPE NCC | GB | 8th Jun 1994 |
| 194.35.25.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.26.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.27.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.28.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |
| 194.35.29.0/24 | 256 | RIPE NCC | GB | 16th Mar 1994 |