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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 188.241.69.0/24 | 256 | RIPE NCC |  RO | 23rd Jun 2009 |
| 188.241.7.0/24 | 256 | RIPE NCC |  DK | 23rd Jun 2009 |
| 188.241.76.0/22 | 1k | RIPE NCC |  IN | 23rd Jun 2009 |
| 188.241.85.0/24 | 256 | RIPE NCC | RO | 23rd Jun 2009 |
| 188.244.120.0/24 | 256 | RIPE NCC |  NL | 27th Sept 2021 |
| 188.34.0.0/19 | 8.2k | RIPE NCC | NL | 19th Mar 2009 |
| 188.34.32.0/19 | 8.2k | RIPE NCC | NL | 19th Mar 2009 |
| 188.64.143.0/24 | 256 | RIPE NCC |  US | 13th Sept 2021 |
| 188.64.148.0/24 | 256 | RIPE NCC |  RU | 21st Jul 2009 |
| 188.64.216.0/21 | 2k | RIPE NCC | RU | 27th Jul 2009 |
| 188.64.232.0/21 | 2k | RIPE NCC |  BE | 27th Jul 2009 |
| 188.64.32.0/24 | 256 | RIPE NCC |  GB | 13th Jul 2009 |
| 188.64.64.0/21 | 2k | RIPE NCC | GB | 15th Jul 2009 |
| 188.65.112.0/21 | 2k | RIPE NCC |  DE | 7th Aug 2009 |
| 188.65.16.0/22 | 1k | RIPE NCC | RO | 5th Jul 2018 |
| 188.65.161.0/24 | 256 | RIPE NCC | DE | 5th Dec 2023 |
| 188.65.163.0/24 | 256 | RIPE NCC |  IE | 6th Dec 2023 |
| 188.65.164.0/24 | 256 | RIPE NCC | GB | 19th Dec 2023 |
| 188.65.166.0/24 | 256 | RIPE NCC | GB | 28th Dec 2023 |
| 188.65.208.0/21 | 2k | RIPE NCC | RU | 18th Aug 2009 |
| 188.66.40.0/21 | 2k | RIPE NCC | DE | 25th Aug 2009 |
| 188.68.190.0/24 | 256 | RIPE NCC | RU | 25th Aug 2009 |
| 188.72.104.0/23 | 512 | RIPE NCC | RU | 9th Jul 2009 |
| 188.72.14.0/24 | 256 | RIPE NCC |  IQ | 7th Jul 2009 |
| 188.72.23.0/24 | 256 | RIPE NCC | IQ | 7th Jul 2009 |
| 188.72.24.0/22 | 1k | RIPE NCC | IQ | 7th Jul 2009 |
| 188.72.28.0/23 | 512 | RIPE NCC | IQ | 7th Jul 2009 |
| 188.74.96.0/19 | 8.2k | RIPE NCC | GB | 5th Aug 2009 |
| 188.92.1.0/24 | 256 | RIPE NCC |  CH | 25th Jun 2024 |
| 188.92.2.0/24 | 256 | RIPE NCC |  BG | 25th Jun 2024 |
| 188.92.25.0/24 | 256 | RIPE NCC | GB | 9th Jan 2024 |
| 188.92.27.0/24 | 256 | RIPE NCC | RO | 9th Jan 2024 |
| 188.92.3.0/24 | 256 | RIPE NCC | CH | 26th Jun 2024 |
| 188.92.31.0/24 | 256 | RIPE NCC |  AT | 9th Jan 2024 |
| 188.92.6.0/24 | 256 | RIPE NCC |  FR | 2nd Jul 2024 |
| 188.92.7.0/24 | 256 | RIPE NCC | FR | 2nd Jul 2024 |
| 188.92.88.0/21 | 2k | RIPE NCC | GB | 24th Apr 2009 |
| 188.93.248.0/21 | 2k | RIPE NCC | AT | 25th May 2009 |
| 188.93.36.0/24 | 256 | RIPE NCC |  ES | 8th May 2009 |
| 188.93.68.0/22 | 1k | RIPE NCC | NL | 5th Feb 2019 |
| 188.95.160.0/21 | 2k | RIPE NCC |  SA | 18th Jan 2011 |
| 188.95.176.0/21 | 2k | RIPE NCC |  RS | 6th Jul 2009 |
| 188.95.195.0/24 | 256 | RIPE NCC |  TR | 11th Mar 2025 |
| 188.95.196.0/24 | 256 | RIPE NCC | GB | 17th Mar 2025 |
| 188.95.199.0/24 | 256 | RIPE NCC | ES | 20th Mar 2025 |
| 189.10.144.0/20 | 4.1k | ARIN | US | 13th Mar 2025 |
| 189.10.208.0/20 | 4.1k | ARIN | US | 13th Mar 2025 |
| 189.10.48.0/20 | 4.1k | APNIC |  HK | 13th Mar 2025 |
| 189.10.64.0/19 | 8.2k | RIPE NCC | GB | 13th Mar 2025 |
| 189.105.128.0/17 | 32.8k | ARIN | US | 29th Jul 2026 |