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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.49.114.0/24 | 256 | RIPE NCC |  DE | 19th Apr 1994 |
| 194.49.122.0/23 | 512 | RIPE NCC |  RU | 12th Apr 2012 |
| 194.49.125.0/24 | 256 | RIPE NCC | DE | 19th Apr 1994 |
| 194.49.18.0/24 | 256 | RIPE NCC |  SI | 21st Nov 2019 |
| 194.49.23.0/24 | 256 | RIPE NCC | DE | 24th Mar 1994 |
| 194.49.32.0/21 | 2k | RIPE NCC |  NL | 25th Mar 1994 |
| 194.49.6.0/24 | 256 | RIPE NCC | SI | 21st Nov 2019 |
| 194.49.62.0/23 | 512 | RIPE NCC | DE | 30th Mar 1994 |
| 194.49.70.0/24 | 256 | RIPE NCC | DE | 30th Mar 1994 |
| 194.5.133.0/24 | 256 | RIPE NCC |  FR | 16th Jan 1995 |
| 194.5.136.0/21 | 2k | RIPE NCC |  CH | 6th Jan 1995 |
| 194.5.144.0/24 | 256 | RIPE NCC | CH | 6th Jan 1995 |
| 194.5.164.0/23 | 512 | RIPE NCC | DE | 18th Oct 2019 |
| 194.5.168.0/23 | 512 | RIPE NCC | DE | 18th Oct 2019 |
| 194.5.17.0/24 | 256 | RIPE NCC | FR | 24th Aug 1994 |
| 194.5.174.0/24 | 256 | RIPE NCC | FR | 31st Jan 1995 |
| 194.5.18.0/23 | 512 | RIPE NCC | FR | 24th Aug 1994 |
| 194.5.184.0/22 | 1k | RIPE NCC |  AT | 14th May 2018 |
| 194.5.194.0/24 | 256 | RIPE NCC | FR | 20th Feb 1995 |
| 194.5.20.0/22 | 1k | RIPE NCC | FR | 24th Aug 1994 |
| 194.5.204.0/24 | 256 | RIPE NCC | FR | 1st Mar 1995 |
| 194.5.253.0/24 | 256 | RIPE NCC | DE | 8th Jun 1995 |
| 194.5.34.0/24 | 256 | RIPE NCC | FR | 29th Sept 1994 |
| 194.5.35.0/24 | 256 | RIPE NCC | FR | 29th Sept 1994 |
| 194.5.36.0/22 | 1k | RIPE NCC |  CY | 29th Sept 1994 |
| 194.5.40.0/22 | 1k | RIPE NCC |  IR | 20th Jul 2018 |
| 194.5.51.0/24 | 256 | RIPE NCC | DE | 17th Oct 1994 |
| 194.5.55.0/24 | 256 | RIPE NCC | FR | 21st Oct 1994 |
| 194.5.56.0/22 | 1k | RIPE NCC |  ES | 14th May 2018 |
| 194.5.86.0/24 | 256 | RIPE NCC |  US | 20th Nov 2019 |
| 194.50.100.0/24 | 256 | RIPE NCC |  CZ | 1st Sept 1993 |
| 194.50.102.0/24 | 256 | RIPE NCC |  DK | 31st Mar 2006 |
| 194.50.104.0/24 | 256 | RIPE NCC | RU | 31st Mar 2006 |
| 194.50.140.0/24 | 256 | RIPE NCC |  SE | 21st Feb 2012 |
| 194.50.165.0/24 | 256 | RIPE NCC |  GB | 13th Apr 2006 |
| 194.50.182.0/24 | 256 | RIPE NCC | DE | 21st Apr 2006 |
| 194.50.203.0/24 | 256 | RIPE NCC | CZ | 1st Sept 1993 |
| 194.50.210.0/23 | 512 | RIPE NCC | GB | 1st Sept 1993 |
| 194.50.212.0/23 | 512 | RIPE NCC |  NO | 23rd Oct 2019 |
| 194.50.217.0/24 | 256 | RIPE NCC | DE | 1st Sept 1993 |
| 194.50.220.0/23 | 512 | RIPE NCC | NO | 23rd Oct 2019 |
| 194.50.225.0/24 | 256 | RIPE NCC | DE | 1st Sept 1993 |
| 194.50.232.0/24 | 256 | RIPE NCC | CZ | 1st Sept 1993 |
| 194.50.242.0/24 | 256 | RIPE NCC | CZ | 1st Sept 1993 |
| 194.50.250.0/23 | 512 | RIPE NCC | GB | 23rd Oct 2019 |
| 194.50.26.0/23 | 512 | RIPE NCC | CZ | 1st Sept 1993 |
| 194.50.3.0/24 | 256 | RIPE NCC | NL | 21st Nov 2019 |
| 194.50.34.0/24 | 256 | RIPE NCC | CH | 7th Mar 2006 |
| 194.50.41.0/24 | 256 | RIPE NCC | GB | 10th Mar 2006 |
| 194.50.52.0/24 | 256 | RIPE NCC |  IT | 21st Nov 2019 |