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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.176.60.0/24 | 256 | RIPE NCC |  GB | 23rd Feb 1993 |
| 193.176.63.0/24 | 256 | RIPE NCC |  NL | 8th Dec 1993 |
| 193.177.0.0/24 | 256 | RIPE NCC |  FR | 18th Nov 2019 |
| 193.177.1.0/24 | 256 | RIPE NCC | NL | 3rd May 1993 |
| 193.177.136.0/22 | 1k | RIPE NCC | GB | 11th Oct 1993 |
| 193.177.148.0/22 | 1k | RIPE NCC |  DE | 15th Apr 1993 |
| 193.177.152.0/21 | 2k | RIPE NCC | NL | 27th Jun 1993 |
| 193.177.16.0/20 | 4.1k | RIPE NCC | NL | 3rd May 1993 |
| 193.177.167.0/24 | 256 | RIPE NCC | NL | 9th Aug 1995 |
| 193.177.183.0/24 | 256 | RIPE NCC | NL | 8th Dec 1993 |
| 193.177.184.0/22 | 1k | RIPE NCC | NL | 4th Aug 1993 |
| 193.177.2.0/23 | 512 | RIPE NCC | NL | 3rd May 1993 |
| 193.177.216.0/22 | 1k | RIPE NCC |  AT | 17th Sept 2018 |
| 193.177.224.0/21 | 2k | RIPE NCC | NL | 2nd Nov 1993 |
| 193.177.243.0/24 | 256 | RIPE NCC |  BE | 4th Aug 2025 |
| 193.177.244.0/24 | 256 | RIPE NCC |  TR | 4th Aug 2025 |
| 193.177.245.0/24 | 256 | RIPE NCC |  IR | 5th Aug 2025 |
| 193.177.248.0/21 | 2k | RIPE NCC | NL | 30th Oct 1995 |
| 193.177.32.0/19 | 8.2k | RIPE NCC | NL | 3rd May 1993 |
| 193.177.4.0/22 | 1k | RIPE NCC | NL | 3rd May 1993 |
| 193.177.64.0/18 | 16.4k | RIPE NCC | NL | 3rd May 1993 |
| 193.177.8.0/21 | 2k | RIPE NCC | NL | 3rd May 1993 |
| 193.178.115.0/24 | 256 | RIPE NCC |  ES | 18th Nov 2019 |
| 193.178.116.0/24 | 256 | RIPE NCC | GB | 21st Apr 1995 |
| 193.178.117.0/24 | 256 | RIPE NCC |  PL | 30th Mar 2005 |
| 193.178.133.0/24 | 256 | RIPE NCC |  FI | 6th Feb 2001 |
| 193.178.140.0/24 | 256 | RIPE NCC | FR | 12th Feb 2001 |
| 193.178.143.0/24 | 256 | RIPE NCC |  SA | 6th Oct 2025 |
| 193.178.148.0/23 | 512 | RIPE NCC | AT | 14th Feb 2001 |
| 193.178.160.0/24 | 256 | RIPE NCC | AT | 15th Feb 2001 |
| 193.178.162.0/24 | 256 | RIPE NCC |  UA | 23rd Mar 2005 |
| 193.178.185.0/24 | 256 | RIPE NCC | DE | 16th Jul 2002 |
| 193.178.189.0/24 | 256 | RIPE NCC | NL | 29th Jul 2002 |
| 193.178.192.0/22 | 1k | RIPE NCC |  LV | 16th Feb 2001 |
| 193.178.204.0/22 | 1k | RIPE NCC |  IT | 7th Mar 2001 |
| 193.178.209.0/24 | 256 | RIPE NCC | BE | 8th Mar 2001 |
| 193.178.210.0/24 | 256 | RIPE NCC |  RU | 14th Dec 2021 |
| 193.178.212.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.214.0/24 | 256 | RIPE NCC | PL | 12th Mar 2001 |
| 193.178.218.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.238.0/23 | 512 | RIPE NCC | GB | 19th Mar 2001 |
| 193.178.24.0/22 | 1k | RIPE NCC |  IE | 30th Nov 1992 |
| 193.178.252.0/22 | 1k | RIPE NCC | IT | 26th Mar 2001 |
| 193.178.31.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.40.0/24 | 256 | RIPE NCC | IE | 6th Oct 1993 |
| 193.178.41.0/24 | 256 | RIPE NCC | IE | 7th Oct 1993 |
| 193.178.52.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.53.0/24 | 256 | RIPE NCC | IE | 24th Oct 1994 |
| 193.186.1.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.186.112.0/20 | 4.1k | RIPE NCC | AT | 18th Dec 2001 |