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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,108 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.93.8.0/22 | 1k | RIPE NCC |  AT | 20th Mar 2015 |
| 185.94.20.0/22 | 1k | RIPE NCC |  IT | 30th Mar 2015 |
| 185.94.208.0/22 | 1k | RIPE NCC |  NL | 7th Apr 2015 |
| 185.94.224.0/22 | 1k | RIPE NCC |  RU | 7th Apr 2015 |
| 185.94.30.0/24 | 256 | RIPE NCC |  RO | 8th Mar 2023 |
| 185.94.31.0/24 | 256 | RIPE NCC | RU | 3rd Oct 2023 |
| 185.94.40.0/22 | 1k | RIPE NCC |  BE | 30th Mar 2015 |
| 185.95.148.0/22 | 1k | RIPE NCC |  SE | 10th Apr 2015 |
| 185.95.6.0/24 | 256 | RIPE NCC |  KW | 8th Apr 2015 |
| 185.95.88.0/22 | 1k | RIPE NCC | SE | 9th Apr 2015 |
| 185.95.92.0/22 | 1k | RIPE NCC | SE | 9th Apr 2015 |
| 185.96.100.0/22 | 1k | RIPE NCC | AT | 16th Apr 2015 |
| 185.96.108.0/22 | 1k | RIPE NCC |  SY | 16th Apr 2015 |
| 185.96.184.0/22 | 1k | RIPE NCC |  FR | 20th Apr 2015 |
| 185.96.48.0/22 | 1k | RIPE NCC |  GB | 15th Apr 2015 |
| 185.96.60.0/22 | 1k | RIPE NCC | GB | 15th Apr 2015 |
| 185.96.76.0/22 | 1k | RIPE NCC |  CH | 15th Apr 2015 |
| 185.96.92.0/22 | 1k | RIPE NCC |  DE | 16th Apr 2015 |
| 185.97.132.0/22 | 1k | RIPE NCC |  PS | 22nd Apr 2015 |
| 185.97.152.0/22 | 1k | RIPE NCC | GB | 23rd Apr 2015 |
| 185.97.176.0/22 | 1k | RIPE NCC | DE | 24th Apr 2015 |
| 185.97.20.0/22 | 1k | RIPE NCC | GB | 21st Apr 2015 |
| 185.97.215.0/24 | 256 | RIPE NCC | DE | 17th Jan 2025 |
| 185.97.244.0/22 | 1k | RIPE NCC |  LU | 28th Apr 2015 |
| 185.97.28.0/22 | 1k | RIPE NCC | GB | 21st Apr 2015 |
| 185.97.32.0/22 | 1k | RIPE NCC | SE | 21st Apr 2015 |
| 185.97.40.0/22 | 1k | RIPE NCC | NL | 21st Apr 2015 |
| 185.97.48.0/22 | 1k | RIPE NCC |  LB | 21st Apr 2015 |
| 185.97.60.0/22 | 1k | RIPE NCC |  DK | 21st Apr 2015 |
| 185.97.64.0/22 | 1k | RIPE NCC | PS | 22nd Apr 2015 |
| 185.97.84.0/22 | 1k | RIPE NCC |  NO | 27th Jun 2016 |
| 185.97.88.0/22 | 1k | RIPE NCC |  US | 22nd Apr 2015 |
| 185.98.108.0/22 | 1k | RIPE NCC | GB | 29th Apr 2015 |
| 185.98.148.0/22 | 1k | RIPE NCC | GB | 30th Apr 2015 |
| 185.98.160.0/24 | 256 | RIPE NCC | DE | 17th Jan 2025 |
| 185.98.162.0/24 | 256 | RIPE NCC | GB | 17th Jan 2025 |
| 185.98.172.0/22 | 1k | RIPE NCC |  IE | 30th Apr 2015 |
| 185.98.228.0/22 | 1k | RIPE NCC |  FI | 4th May 2015 |
| 185.98.24.0/24 | 256 | RIPE NCC | CH | 23rd Jan 2026 |
| 185.98.27.0/24 | 256 | RIPE NCC | GB | 23rd Jan 2026 |
| 185.98.36.0/22 | 1k | RIPE NCC | DK | 28th Apr 2015 |
| 185.98.44.0/22 | 1k | RIPE NCC | GB | 28th Apr 2015 |
| 185.98.86.0/24 | 256 | RIPE NCC | RU | 29th Apr 2015 |
| 185.98.87.0/24 | 256 | RIPE NCC | RU | 29th Apr 2015 |
| 185.99.60.0/22 | 1k | RIPE NCC |  ES | 6th May 2015 |
| 185.99.72.0/22 | 1k | RIPE NCC | AT | 7th May 2015 |
| 185.99.84.0/22 | 1k | RIPE NCC | GB | 7th May 2015 |
| 186.121.154.0/23 | 512 | LACNIC |  AR | 16th Mar 2012 |
| 186.121.156.0/22 | 1k | LACNIC | AR | 16th Mar 2012 |
| 186.121.188.0/23 | 512 | LACNIC | AR | 16th Mar 2012 |