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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 109.68.218.0/24 | 256 | RIPE NCC |  BY | 9th Jul 2026 |
| 109.68.220.0/24 | 256 | RIPE NCC |  SI | 9th Jul 2026 |
| 109.68.221.0/24 | 256 | RIPE NCC |  LB | 10th Jul 2026 |
| 109.68.222.0/24 | 256 | RIPE NCC |  AZ | 13th Jul 2026 |
| 109.68.240.0/21 | 2k | RIPE NCC |  BE | 23rd Sept 2009 |
| 109.68.32.0/21 | 2k | RIPE NCC |  DE | 2nd Mar 2010 |
| 109.69.136.0/21 | 2k | RIPE NCC |  NL | 13th Oct 2009 |
| 109.69.40.0/21 | 2k | RIPE NCC |  MK | 25th Sept 2009 |
| 109.69.88.0/21 | 2k | RIPE NCC |  PL | 9th Apr 2010 |
| 109.70.176.0/21 | 2k | RIPE NCC |  FI | 9th Nov 2009 |
| 109.71.0.0/21 | 2k | RIPE NCC | NL | 11th Nov 2009 |
| 109.71.157.0/24 | 256 | RIPE NCC |  FR | 18th Dec 2025 |
| 109.71.159.0/24 | 256 | RIPE NCC |  AE | 19th Dec 2025 |
| 109.71.188.0/23 | 512 | RIPE NCC |  KW | 23rd Nov 2009 |
| 109.71.32.0/21 | 2k | RIPE NCC |  KZ | 12th Nov 2009 |
| 109.71.79.0/24 | 256 | RIPE NCC |  IE | 23rd Jun 2020 |
| 109.72.176.0/20 | 4.1k | RIPE NCC | NL | 23rd Sept 2009 |
| 109.73.140.0/22 | 1k | RIPE NCC | DE | 29th Aug 2018 |
| 109.73.48.0/21 | 2k | RIPE NCC | DE | 7th Oct 2009 |
| 109.73.56.0/21 | 2k | RIPE NCC | DE | 7th Oct 2009 |
| 109.74.18.0/24 | 256 | RIPE NCC |  TR | 19th Jan 2026 |
| 109.75.224.0/21 | 2k | RIPE NCC | FI | 24th Nov 2009 |
| 109.94.124.0/23 | 512 | RIPE NCC |  RS | 6th Nov 2009 |
| 109.94.192.0/20 | 4.1k | RIPE NCC |  RU | 27th Oct 2009 |
| 109.95.128.0/21 | 2k | RIPE NCC |  IL | 23rd Dec 2009 |
| 109.95.240.0/21 | 2k | RIPE NCC |  GB | 27th Jan 2010 |
| 110.165.32.0/19 | 8.2k | APNIC |  CN | 15th Jun 2010 |
| 110.172.26.0/23 | 512 | APNIC |  VN | 11th Aug 2025 |
| 110.172.64.0/19 | 8.2k | APNIC |  KR | 28th Apr 2009 |
| 110.173.64.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 110.173.96.0/19 | 8.2k | APNIC | CN | 5th May 2009 |
| 110.232.100.0/22 | 1k | APNIC | KR | 19th May 2009 |
| 110.232.104.0/21 | 2k | APNIC | KR | 19th May 2009 |
| 110.232.176.0/22 | 1k | APNIC |  AU | 27th May 2009 |
| 110.232.32.0/19 | 8.2k | APNIC | CN | 14th May 2009 |
| 110.232.73.0/24 | 256 | APNIC |  ID | 18th May 2009 |
| 110.232.74.0/23 | 512 | APNIC | ID | 18th May 2009 |
| 110.232.76.0/23 | 512 | APNIC | ID | 18th May 2009 |
| 110.232.79.0/24 | 256 | APNIC | ID | 18th May 2009 |
| 110.232.88.0/23 | 512 | APNIC | ID | 18th May 2009 |
| 110.235.192.0/20 | 4.1k | APNIC |  IN | 15th May 2009 |
| 110.235.208.0/21 | 2k | APNIC | IN | 15th May 2009 |
| 110.34.39.0/24 | 256 | APNIC |  PK | 27th Feb 2009 |
| 110.34.40.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 110.34.44.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 110.34.48.0/22 | 1k | APNIC |  NZ | 2nd Mar 2009 |
| 110.34.56.0/21 | 2k | APNIC | KR | 3rd Mar 2009 |
| 110.35.88.0/21 | 2k | APNIC |  FJ | 16th Mar 2011 |
| 110.36.128.0/18 | 16.4k | APNIC | PK | 24th Feb 2009 |
| 110.36.232.0/23 | 512 | APNIC | AU | 24th Feb 2009 |