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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.107.196.0/22 | 1k | RIPE NCC |  PL | 5th Mar 2010 |
| 193.107.246.0/24 | 256 | RIPE NCC |  GR | 12th Mar 2010 |
| 193.107.49.0/24 | 256 | RIPE NCC |  AE | 31st Aug 2022 |
| 193.108.120.0/22 | 1k | RIPE NCC |  UA | 8th May 2001 |
| 193.108.138.0/23 | 512 | RIPE NCC |  DE | 16th May 2001 |
| 193.108.148.0/22 | 1k | RIPE NCC |  BE | 6th Jun 2001 |
| 193.108.187.0/24 | 256 | RIPE NCC |  CH | 31st May 2001 |
| 193.108.188.0/24 | 256 | RIPE NCC |  LU | 31st May 2001 |
| 193.108.189.0/24 | 256 | RIPE NCC | LU | 31st May 2001 |
| 193.108.19.0/24 | 256 | RIPE NCC | DE | 28th Mar 2001 |
| 193.108.192.0/24 | 256 | RIPE NCC | DE | 7th Jun 2001 |
| 193.108.223.0/24 | 256 | RIPE NCC |  SE | 8th Aug 2001 |
| 193.108.224.0/24 | 256 | RIPE NCC |  RS | 11th Dec 2024 |
| 193.108.225.0/24 | 256 | RIPE NCC |  NL | 12th Dec 2024 |
| 193.108.228.0/23 | 512 | RIPE NCC | PL | 4th Jul 2001 |
| 193.108.23.0/24 | 256 | AFRINIC |  GH | 20th Sept 2007 |
| 193.108.236.0/23 | 512 | RIPE NCC |  SK | 11th Jul 2001 |
| 193.108.28.0/24 | 256 | AFRINIC | GH | 20th Sept 2007 |
| 193.108.30.0/24 | 256 | RIPE NCC |  KW | 30th Jun 2008 |
| 193.108.34.0/23 | 512 | RIPE NCC | PL | 27th Mar 2001 |
| 193.108.98.0/23 | 512 | RIPE NCC | NL | 25th Apr 2001 |
| 193.109.116.0/24 | 256 | RIPE NCC |  ES | 18th Sept 2001 |
| 193.109.117.0/24 | 256 | RIPE NCC |  FR | 19th Sept 2001 |
| 193.109.12.0/22 | 1k | RIPE NCC |  GB | 4th May 2018 |
| 193.109.127.0/24 | 256 | RIPE NCC | PL | 4th Oct 2001 |
| 193.109.148.0/22 | 1k | RIPE NCC |  AT | 27th Sept 2001 |
| 193.109.160.0/22 | 1k | RIPE NCC |  RU | 3rd Oct 2001 |
| 193.109.168.0/22 | 1k | RIPE NCC | UA | 4th May 2018 |
| 193.109.210.0/24 | 256 | RIPE NCC |  NO | 5th Oct 2001 |
| 193.109.211.0/24 | 256 | RIPE NCC |  LV | 5th Oct 2001 |
| 193.109.221.0/24 | 256 | RIPE NCC |  SC | 15th Nov 2019 |
| 193.109.223.0/24 | 256 | RIPE NCC | DE | 13th Jan 2009 |
| 193.109.233.0/24 | 256 | RIPE NCC |  IT | 23rd Nov 2001 |
| 193.109.236.0/24 | 256 | RIPE NCC | DE | 26th Nov 2001 |
| 193.109.254.0/23 | 512 | RIPE NCC | GB | 5th Nov 2001 |
| 193.109.50.0/23 | 512 | RIPE NCC | GB | 25th Jul 2001 |
| 193.109.56.0/24 | 256 | RIPE NCC |  IR | 5th Jun 2023 |
| 193.109.64.0/23 | 512 | RIPE NCC | NL | 10th Oct 2019 |
| 193.109.66.0/23 | 512 | AFRINIC |  KE | 20th Sept 2007 |
| 193.109.83.0/24 | 256 | RIPE NCC | FR | 17th Aug 2001 |
| 193.110.0.0/22 | 1k | RIPE NCC | RU | 4th May 2018 |
| 193.110.108.0/23 | 512 | RIPE NCC |  FI | 14th Dec 2001 |
| 193.110.116.0/22 | 1k | RIPE NCC | DE | 21st Dec 2001 |
| 193.110.12.0/23 | 512 | RIPE NCC | SE | 27th Nov 2001 |
| 193.110.124.0/22 | 1k | RIPE NCC | UA | 8th Jan 2002 |
| 193.110.138.0/24 | 256 | RIPE NCC |  US | 14th Jan 2002 |
| 193.110.148.0/24 | 256 | RIPE NCC | NL | 15th Nov 2019 |
| 193.110.158.0/24 | 256 | RIPE NCC | NL | 15th Nov 2019 |
| 193.110.166.0/23 | 512 | RIPE NCC |  DK | 14th Jan 2002 |
| 193.110.170.0/23 | 512 | RIPE NCC |  TR | 15th Jan 2002 |