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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.29.248.0/23 | 512 | RIPE NCC |  NL | 7th Oct 2019 |
| 193.29.26.0/24 | 256 | RIPE NCC | NL | 13th Nov 2019 |
| 193.29.27.0/24 | 256 | RIPE NCC |  DE | 28th Jul 1993 |
| 193.29.36.0/23 | 512 | RIPE NCC |  MT | 7th Oct 2019 |
| 193.29.40.0/23 | 512 | RIPE NCC | MT | 7th Oct 2019 |
| 193.29.43.0/24 | 256 | RIPE NCC | DE | 28th Jul 1993 |
| 193.29.49.0/24 | 256 | RIPE NCC |  ES | 22nd Sept 2025 |
| 193.29.50.0/24 | 256 | RIPE NCC |  IR | 8th May 2025 |
| 193.29.6.0/23 | 512 | RIPE NCC |  GB | 7th Oct 2019 |
| 193.3.12.0/22 | 1k | RIPE NCC |  DK | 1st Sept 1993 |
| 193.3.133.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.134.0/23 | 512 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.138.0/23 | 512 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.144.0/21 | 2k | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.152.0/22 | 1k | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.156.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.158.0/24 | 256 | RIPE NCC |  HR | 15th Feb 2021 |
| 193.3.170.0/24 | 256 | RIPE NCC |  SC | 27th Oct 2021 |
| 193.3.190.0/24 | 256 | RIPE NCC |  FR | 28th Oct 2021 |
| 193.3.228.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.229.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.247.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.248.0/22 | 1k | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.25.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.26.0/24 | 256 | RIPE NCC | GB | 17th May 2021 |
| 193.3.36.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.43.0/24 | 256 | RIPE NCC | GB | 1st Sept 1993 |
| 193.3.46.0/24 | 256 | RIPE NCC | GB | 3rd Sept 2020 |
| 193.3.47.0/24 | 256 | RIPE NCC | DK | 1st Sept 1993 |
| 193.3.54.0/24 | 256 | RIPE NCC |  US | 25th Mar 2021 |
| 193.3.63.0/24 | 256 | RIPE NCC |  BG | 2nd Sept 2020 |
| 193.30.108.0/24 | 256 | RIPE NCC |  RU | 23rd Mar 2022 |
| 193.30.142.0/24 | 256 | RIPE NCC |  SE | 8th Jan 2004 |
| 193.30.143.0/24 | 256 | RIPE NCC | DK | 8th Jan 2004 |
| 193.30.144.0/20 | 4.1k | RIPE NCC | FR | 21st Sept 1993 |
| 193.30.16.0/23 | 512 | RIPE NCC | DE | 21st Sept 1993 |
| 193.30.176.0/20 | 4.1k | RIPE NCC | DE | 21st Sept 1993 |
| 193.30.232.0/22 | 1k | RIPE NCC | GB | 3rd Feb 2004 |
| 193.30.28.0/24 | 256 | RIPE NCC |  RO | 7th May 2012 |
| 193.30.31.0/24 | 256 | RIPE NCC | ES | 10th Nov 2020 |
| 193.30.4.0/24 | 256 | RIPE NCC | DE | 21st Sept 1993 |
| 193.30.89.0/24 | 256 | RIPE NCC | DE | 21st Sept 1993 |
| 193.31.10.0/23 | 512 | RIPE NCC | DE | 9th Nov 1993 |
| 193.31.118.0/24 | 256 | RIPE NCC |  TR | 18th Oct 2018 |
| 193.31.12.0/24 | 256 | RIPE NCC |  CA | 7th Oct 2019 |
| 193.31.128.0/19 | 8.2k | RIPE NCC | DE | 9th Nov 1993 |
| 193.31.13.0/24 | 256 | RIPE NCC | SC | 7th Oct 2019 |
| 193.31.15.0/24 | 256 | RIPE NCC |  LT | 14th Nov 2019 |
| 193.31.20.0/22 | 1k | RIPE NCC | DE | 26th Apr 2018 |
| 193.31.224.0/20 | 4.1k | RIPE NCC | DE | 9th Nov 1993 |