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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,273 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.33.170.0/24 | 256 | RIPE NCC |  FR | 15th Jul 1988 |
| 192.33.176.0/24 | 256 | RIPE NCC | FR | 15th Dec 1987 |
| 192.33.177.0/24 | 256 | RIPE NCC | FR | 15th Dec 1987 |
| 192.33.178.0/24 | 256 | RIPE NCC | FR | 21st Dec 1988 |
| 192.33.179.0/24 | 256 | RIPE NCC | FR | 1st Jan 1984 |
| 192.33.180.0/24 | 256 | RIPE NCC | FR | 21st Dec 1988 |
| 192.33.181.0/24 | 256 | RIPE NCC | FR | 15th Dec 1987 |
| 192.33.233.0/24 | 256 | RIPE NCC |  NL | 17th May 1990 |
| 192.33.254.0/24 | 256 | RIPE NCC |  DE | 3rd May 1991 |
| 192.34.116.0/24 | 256 | RIPE NCC | NL | 4th Mar 1994 |
| 192.34.179.0/24 | 256 | RIPE NCC |  FI | 22nd Jan 1997 |
| 192.34.19.0/24 | 256 | RIPE NCC |  GB | 24th Aug 2009 |
| 192.34.50.0/24 | 256 | RIPE NCC | GB | 9th Apr 1992 |
| 192.35.108.0/24 | 256 | RIPE NCC | GB | 1st Apr 1988 |
| 192.35.130.0/24 | 256 | RIPE NCC | NL | 15th Apr 1993 |
| 192.35.131.0/24 | 256 | RIPE NCC | NL | 7th Apr 1988 |
| 192.35.132.0/24 | 256 | RIPE NCC | NL | 15th Apr 1993 |
| 192.35.138.0/24 | 256 | RIPE NCC | GB | 7th Apr 1988 |
| 192.35.146.0/24 | 256 | RIPE NCC |  IT | 15th Apr 1988 |
| 192.35.16.0/22 | 1k | RIPE NCC | DE | 28th Oct 1987 |
| 192.35.183.0/24 | 256 | RIPE NCC | NL | 2nd May 1988 |
| 192.35.184.0/21 | 2k | RIPE NCC | NL | 2nd May 1988 |
| 192.35.192.0/24 | 256 | RIPE NCC | NL | 2nd May 1988 |
| 192.35.197.0/24 | 256 | RIPE NCC | GB | 9th May 1988 |
| 192.35.207.0/24 | 256 | RIPE NCC |  IE | 27th May 1988 |
| 192.35.244.0/24 | 256 | RIPE NCC |  AT | 17th May 1990 |
| 192.35.247.0/24 | 256 | RIPE NCC |  SE | 17th May 1990 |
| 192.35.65.0/24 | 256 | RIPE NCC | DE | 2nd Mar 1988 |
| 192.35.90.0/24 | 256 | RIPE NCC | DE | 5th Jan 1989 |
| 192.37.0.0/16 | 65.5k | RIPE NCC |  CH | 20th Aug 1993 |
| 192.40.228.0/24 | 256 | RIPE NCC | FI | 30th Aug 2001 |
| 192.41.141.0/24 | 256 | RIPE NCC | CH | 30th Jun 1988 |
| 192.41.142.0/23 | 512 | RIPE NCC | CH | 30th Jun 1988 |
| 192.41.144.0/23 | 512 | RIPE NCC | CH | 30th Jun 1988 |
| 192.41.147.0/24 | 256 | RIPE NCC | DE | 14th Dec 1993 |
| 192.41.210.0/24 | 256 | RIPE NCC | GB | 27th Jun 1988 |
| 192.42.1.0/24 | 256 | RIPE NCC | DE | 14th Nov 1988 |
| 192.42.102.0/24 | 256 | RIPE NCC | FR | 13th Apr 1992 |
| 192.42.53.0/24 | 256 | RIPE NCC | GB | 17th Aug 1988 |
| 192.42.87.0/24 | 256 | RIPE NCC | GB | 2nd Sept 1988 |
| 192.43.162.0/23 | 512 | RIPE NCC | SE | 15th Nov 1988 |
| 192.44.41.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.42.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.43.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.44.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.45.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.46.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.47.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.48.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |
| 192.44.49.0/24 | 256 | RIPE NCC | FR | 15th Dec 1988 |