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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,356 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2001:7f8:135::/48 | 65.5k × /64 | RIPE NCC |  PL | 19th Dec 2025 |
| 2001:7f8:136::/48 | 65.5k × /64 | RIPE NCC |  TR | 25th Oct 2022 |
| 2001:7f8:137::/48 | 65.5k × /64 | RIPE NCC |  CH | 17th Jul 2025 |
| 2001:7f8:138::/48 | 65.5k × /64 | RIPE NCC |  DE | 27th Oct 2022 |
| 2001:7f8:139::/48 | 65.5k × /64 | RIPE NCC | DE | 8th Nov 2022 |
| 2001:7f8:13::/48 | 65.5k × /64 | RIPE NCC |  NL | 3rd Feb 2003 |
| 2001:7f8:13a::/48 | 65.5k × /64 | RIPE NCC | DE | 8th Nov 2022 |
| 2001:7f8:13b::/48 | 65.5k × /64 | RIPE NCC | DE | 8th Nov 2022 |
| 2001:7f8:13c::/48 | 65.5k × /64 | RIPE NCC | DE | 8th Nov 2022 |
| 2001:7f8:13d::/48 | 65.5k × /64 | RIPE NCC |  RU | 11th Nov 2022 |
| 2001:7f8:13e::/48 | 65.5k × /64 | RIPE NCC | DE | 11th Nov 2022 |
| 2001:7f8:13f::/48 | 65.5k × /64 | RIPE NCC |  IT | 23rd Nov 2022 |
| 2001:7f8:140::/48 | 65.5k × /64 | RIPE NCC | DE | 12th Dec 2024 |
| 2001:7f8:141::/48 | 65.5k × /64 | RIPE NCC | NL | 13th Dec 2022 |
| 2001:7f8:142::/48 | 65.5k × /64 | RIPE NCC | PL | 19th Dec 2022 |
| 2001:7f8:143::/48 | 65.5k × /64 | RIPE NCC | DE | 11th Jan 2023 |
| 2001:7f8:144::/48 | 65.5k × /64 | RIPE NCC | IT | 20th Jan 2023 |
| 2001:7f8:146::/48 | 65.5k × /64 | RIPE NCC | CH | 15th Jul 2025 |
| 2001:7f8:147::/48 | 65.5k × /64 | RIPE NCC |  GB | 1st Feb 2024 |
| 2001:7f8:148::/48 | 65.5k × /64 | RIPE NCC |  BG | 26th May 2023 |
| 2001:7f8:149::/48 | 65.5k × /64 | RIPE NCC |  DK | 1st Jun 2023 |
| 2001:7f8:14::/48 | 65.5k × /64 | RIPE NCC |  CZ | 3rd Feb 2003 |
| 2001:7f8:14a::/48 | 65.5k × /64 | RIPE NCC | CH | 9th Jun 2023 |
| 2001:7f8:14b::/48 | 65.5k × /64 | RIPE NCC | GB | 12th Jun 2023 |
| 2001:7f8:14c::/48 | 65.5k × /64 | RIPE NCC |  GE | 7th Feb 2024 |
| 2001:7f8:14d::/48 | 65.5k × /64 | RIPE NCC |  UA | 13th Jul 2023 |
| 2001:7f8:14e::/48 | 65.5k × /64 | RIPE NCC | DE | 13th Jul 2023 |
| 2001:7f8:14f::/48 | 65.5k × /64 | RIPE NCC |  UZ | 4th Aug 2023 |
| 2001:7f8:150::/48 | 65.5k × /64 | RIPE NCC |  SA | 16th Aug 2023 |
| 2001:7f8:151::/48 | 65.5k × /64 | RIPE NCC |  SI | 31st Aug 2023 |
| 2001:7f8:153::/48 | 65.5k × /64 | RIPE NCC | GB | 8th Feb 2024 |
| 2001:7f8:155::/48 | 65.5k × /64 | RIPE NCC | DE | 26th Mar 2024 |
| 2001:7f8:156::/48 | 65.5k × /64 | RIPE NCC | DE | 26th Mar 2024 |
| 2001:7f8:157::/48 | 65.5k × /64 | RIPE NCC | DE | 6th Jul 2026 |
| 2001:7f8:159::/48 | 65.5k × /64 | RIPE NCC | IT | 23rd Feb 2026 |
| 2001:7f8:15::/48 | 65.5k × /64 | RIPE NCC |  EE | 17th Feb 2003 |
| 2001:7f8:15a::/48 | 65.5k × /64 | RIPE NCC | NL | 29th May 2024 |
| 2001:7f8:15b::/48 | 65.5k × /64 | RIPE NCC | DE | 2nd Jul 2024 |
| 2001:7f8:15c::/48 | 65.5k × /64 | RIPE NCC | CH | 12th Sept 2024 |
| 2001:7f8:15d::/48 | 65.5k × /64 | RIPE NCC | TR | 13th Sept 2024 |
| 2001:7f8:15e::/48 | 65.5k × /64 | RIPE NCC | NL | 19th Dec 2024 |
| 2001:7f8:15f::/48 | 65.5k × /64 | RIPE NCC | SA | 31st Dec 2024 |
| 2001:7f8:160::/48 | 65.5k × /64 | RIPE NCC | NL | 29th Jan 2025 |
| 2001:7f8:161::/48 | 65.5k × /64 | RIPE NCC | BG | 28th Feb 2025 |
| 2001:7f8:162::/48 | 65.5k × /64 | RIPE NCC |  QA | 3rd Mar 2025 |
| 2001:7f8:163::/48 | 65.5k × /64 | RIPE NCC | QA | 31st Mar 2025 |
| 2001:7f8:164::/48 | 65.5k × /64 | RIPE NCC |  JP | 21st Aug 2025 |
| 2001:7f8:165::/48 | 65.5k × /64 | RIPE NCC |  TM | 25th Aug 2025 |
| 2001:7f8:166::/48 | 65.5k × /64 | RIPE NCC |  IQ | 3rd Sept 2025 |
| 2001:7f8:167::/48 | 65.5k × /64 | RIPE NCC |  ES | 8th Sept 2025 |