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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.102.76.0/24 | 256 | RIPE NCC |  RO | 8th Jul 1998 |
| 194.102.78.0/23 | 512 | RIPE NCC | RO | 8th Jul 1998 |
| 194.102.82.0/23 | 512 | RIPE NCC | RO | 8th Jul 1998 |
| 194.102.84.0/24 | 256 | RIPE NCC | RO | 8th Jul 1998 |
| 194.102.87.0/24 | 256 | RIPE NCC | RO | 8th Jul 1998 |
| 194.102.92.0/24 | 256 | RIPE NCC | RO | 8th Jul 1998 |
| 194.102.94.0/23 | 512 | RIPE NCC | RO | 8th Jul 1998 |
| 194.102.96.0/23 | 512 | RIPE NCC | RO | 8th Jul 1998 |
| 194.104.12.0/22 | 1k | RIPE NCC |  LU | 1st Aug 2018 |
| 194.104.120.0/24 | 256 | RIPE NCC |  AE | 5th Oct 2023 |
| 194.104.127.0/24 | 256 | RIPE NCC |  DK | 6th Aug 2025 |
| 194.104.132.0/24 | 256 | RIPE NCC |  BG | 30th Sept 2021 |
| 194.104.134.0/24 | 256 | RIPE NCC |  DE | 27th Jan 2026 |
| 194.104.136.0/24 | 256 | RIPE NCC |  MD | 1st Oct 2021 |
| 194.104.137.0/24 | 256 | RIPE NCC |  TR | 1st Oct 2021 |
| 194.104.139.0/24 | 256 | RIPE NCC |  HK | 1st Oct 2021 |
| 194.104.140.0/24 | 256 | RIPE NCC | HK | 1st Oct 2021 |
| 194.104.141.0/24 | 256 | RIPE NCC |  ES | 1st Oct 2021 |
| 194.104.150.0/23 | 512 | RIPE NCC |  NL | 20th Feb 1995 |
| 194.104.159.0/24 | 256 | RIPE NCC | NL | 26th May 1995 |
| 194.104.160.0/20 | 4.1k | RIPE NCC | NL | 18th Dec 1994 |
| 194.104.176.0/21 | 2k | RIPE NCC | NL | 18th Dec 1994 |
| 194.104.184.0/24 | 256 | RIPE NCC | NL | 18th Dec 1994 |
| 194.104.185.0/24 | 256 | RIPE NCC | NL | 15th Feb 1995 |
| 194.104.231.0/24 | 256 | RIPE NCC |  NO | 1st Oct 2021 |
| 194.104.88.0/23 | 512 | RIPE NCC | NL | 2nd Dec 1994 |
| 194.104.95.0/24 | 256 | RIPE NCC |  JO | 9th Sept 2025 |
| 194.104.96.0/24 | 256 | RIPE NCC | NL | 2nd Dec 1994 |
| 194.105.0.0/24 | 256 | RIPE NCC | RO | 15th Jan 2001 |
| 194.105.18.0/24 | 256 | RIPE NCC | RO | 15th Jan 2001 |
| 194.105.19.0/24 | 256 | RIPE NCC | RO | 15th Jan 2001 |
| 194.105.2.0/24 | 256 | RIPE NCC | RO | 15th Jan 2001 |
| 194.105.22.0/23 | 512 | RIPE NCC | RO | 15th Jan 2001 |
| 194.105.3.0/24 | 256 | RIPE NCC | RO | 15th Jan 2001 |
| 194.106.202.0/23 | 512 | RIPE NCC |  IE | 29th Oct 2019 |
| 194.106.207.0/24 | 256 | RIPE NCC |  GB | 14th Apr 2023 |
| 194.106.220.0/23 | 512 | RIPE NCC | GB | 10th May 2004 |
| 194.107.132.0/22 | 1k | RIPE NCC |  AT | 10th Jan 1995 |
| 194.107.145.0/24 | 256 | RIPE NCC | AT | 9th Feb 1995 |
| 194.107.146.0/23 | 512 | RIPE NCC | AT | 9th Feb 1995 |
| 194.107.16.0/24 | 256 | RIPE NCC | GB | 9th Jul 2007 |
| 194.107.167.0/24 | 256 | RIPE NCC | AT | 1st Mar 1995 |
| 194.107.168.0/21 | 2k | RIPE NCC | AT | 16th Feb 1995 |
| 194.107.204.0/22 | 1k | RIPE NCC | DE | 23rd May 2018 |
| 194.107.208.0/20 | 4.1k | RIPE NCC | AT | 6th Mar 1995 |
| 194.107.229.0/24 | 256 | RIPE NCC | TR | 22nd Nov 2019 |
| 194.107.48.0/22 | 1k | RIPE NCC | AT | 10th Nov 1994 |
| 194.107.52.0/22 | 1k | RIPE NCC | DE | 21st Nov 1994 |
| 194.107.72.0/22 | 1k | RIPE NCC |  CZ | 1st Aug 2018 |
| 194.109.0.0/16 | 65.5k | RIPE NCC | NL | 13th May 1996 |