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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.110.19.0/24 | 256 | RIPE NCC |  TR | 22nd Nov 2019 |
| 194.110.194.0/24 | 256 | RIPE NCC |  IE | 29th Mar 2007 |
| 194.110.20.0/23 | 512 | RIPE NCC |  IT | 29th Oct 2019 |
| 194.110.200.0/24 | 256 | RIPE NCC |  DE | 22nd Nov 2019 |
| 194.110.210.0/24 | 256 | RIPE NCC | DE | 22nd Nov 2019 |
| 194.110.211.0/24 | 256 | RIPE NCC |  NL | 5th Apr 2007 |
| 194.110.214.0/24 | 256 | RIPE NCC | NL | 10th Apr 2007 |
| 194.110.215.0/24 | 256 | RIPE NCC |  GB | 10th Apr 2007 |
| 194.110.216.0/24 | 256 | RIPE NCC |  RS | 11th Apr 2007 |
| 194.110.223.0/24 | 256 | RIPE NCC |  RU | 12th Apr 2007 |
| 194.110.236.0/24 | 256 | RIPE NCC |  JO | 12th Apr 2007 |
| 194.110.237.0/24 | 256 | RIPE NCC | GB | 12th Apr 2007 |
| 194.110.244.0/24 | 256 | RIPE NCC | GB | 16th Apr 2007 |
| 194.110.245.0/24 | 256 | RIPE NCC |  FR | 16th Apr 2007 |
| 194.110.252.0/24 | 256 | RIPE NCC |  UA | 13th Nov 2009 |
| 194.110.26.0/24 | 256 | RIPE NCC |  PL | 18th Jul 2007 |
| 194.110.28.0/23 | 512 | RIPE NCC | IT | 29th Oct 2019 |
| 194.110.31.0/24 | 256 | RIPE NCC |  FI | 1st Feb 1995 |
| 194.110.32.0/22 | 1k | RIPE NCC | FI | 18th Sept 1995 |
| 194.110.36.0/23 | 512 | RIPE NCC | FI | 18th Sept 1995 |
| 194.110.39.0/24 | 256 | RIPE NCC | FI | 18th Sept 1995 |
| 194.110.40.0/22 | 1k | RIPE NCC | FI | 3rd Oct 1995 |
| 194.110.68.0/24 | 256 | RIPE NCC |  RO | 17th Apr 2007 |
| 194.110.7.0/24 | 256 | RIPE NCC | TR | 22nd Nov 2019 |
| 194.110.71.0/24 | 256 | RIPE NCC | RU | 3rd Feb 2026 |
| 194.110.74.0/24 | 256 | RIPE NCC | GB | 22nd Nov 2019 |
| 194.110.80.0/22 | 1k | RIPE NCC | RU | 25th Sept 2018 |
| 194.110.92.0/22 | 1k | RIPE NCC | DE | 26th Sept 2018 |
| 194.110.96.0/20 | 4.1k | RIPE NCC |  SE | 16th Feb 1995 |
| 194.112.20.0/22 | 1k | RIPE NCC | DE | 13th Jan 1995 |
| 194.113.100.0/22 | 1k | RIPE NCC | DE | 14th Dec 1994 |
| 194.113.116.0/24 | 256 | RIPE NCC |  IR | 9th Jul 2026 |
| 194.113.128.0/22 | 1k | RIPE NCC | DE | 14th Dec 1994 |
| 194.113.132.0/22 | 1k | RIPE NCC | DE | 14th Dec 1994 |
| 194.113.138.0/24 | 256 | RIPE NCC | DE | 14th Dec 1994 |
| 194.113.148.0/23 | 512 | RIPE NCC | DE | 16th Dec 1994 |
| 194.113.164.0/24 | 256 | RIPE NCC |  AT | 22nd Nov 2019 |
| 194.113.166.0/23 | 512 | RIPE NCC | DE | 30th Oct 2019 |
| 194.113.168.0/24 | 256 | RIPE NCC | DE | 2nd Jan 1995 |
| 194.113.169.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.113.170.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.113.171.0/24 | 256 | RIPE NCC | NL | 2nd Jan 1995 |
| 194.113.172.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.113.174.0/23 | 512 | RIPE NCC | DE | 30th Oct 2019 |
| 194.113.180.0/22 | 1k | RIPE NCC | DE | 3rd Jan 1995 |
| 194.113.184.0/22 | 1k | RIPE NCC | DE | 3rd Jan 1995 |
| 194.113.188.0/23 | 512 | RIPE NCC | DE | 3rd Jan 1995 |
| 194.113.190.0/23 | 512 | RIPE NCC | DE | 3rd Jan 1995 |
| 194.113.196.0/22 | 1k | RIPE NCC |  IQ | 24th May 2018 |
| 194.113.200.0/21 | 2k | RIPE NCC | DE | 10th Jan 1995 |