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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 61.47.56.0/24 | 256 | APNIC |  JP | 1st Mar 2005 |
| 61.47.64.0/23 | 512 | APNIC | JP | 1st Mar 2005 |
| 61.47.66.0/24 | 256 | APNIC | JP | 1st Mar 2005 |
| 61.47.72.0/21 | 2k | APNIC | JP | 1st Mar 2005 |
| 61.47.88.0/21 | 2k | APNIC |  HK | 1st Mar 2005 |
| 61.47.98.0/23 | 512 | APNIC | JP | 1st Mar 2005 |
| 61.5.240.0/23 | 512 | APNIC | JP | 28th Jul 2006 |
| 61.5.244.0/24 | 256 | APNIC | JP | 28th Jul 2006 |
| 61.67.112.0/21 | 2k | APNIC |  TW | 21st Feb 2001 |
| 61.67.122.0/23 | 512 | APNIC | TW | 21st Feb 2001 |
| 61.67.124.0/22 | 1k | APNIC | TW | 21st Feb 2001 |
| 61.67.96.0/20 | 4.1k | APNIC | TW | 21st Feb 2001 |
| 61.8.160.0/20 | 4.1k | APNIC |  CN | 7th Aug 2006 |
| 61.87.12.0/23 | 512 | APNIC | JP | 26th Sept 2003 |
| 61.87.8.0/22 | 1k | APNIC | JP | 26th Sept 2003 |
| 62.106.65.0/24 | 256 | RIPE NCC |  DE | 7th Oct 2021 |
| 62.106.75.0/24 | 256 | RIPE NCC | DE | 7th Oct 2021 |
| 62.106.79.0/24 | 256 | RIPE NCC |  CZ | 7th Oct 2021 |
| 62.106.83.0/24 | 256 | RIPE NCC |  MD | 8th Oct 2021 |
| 62.106.84.0/24 | 256 | RIPE NCC |  UA | 8th Oct 2021 |
| 62.108.80.0/21 | 2k | RIPE NCC |  TR | 15th Jun 2000 |
| 62.111.0.0/17 | 32.8k | RIPE NCC | DE | 13th Jul 2001 |
| 62.113.87.0/24 | 256 | RIPE NCC |  RU | 16th Aug 2000 |
| 62.113.91.0/24 | 256 | RIPE NCC | RU | 16th Aug 2000 |
| 62.117.128.0/19 | 8.2k | RIPE NCC |  ES | 27th Jul 2000 |
| 62.117.160.0/19 | 8.2k | RIPE NCC | ES | 31st Oct 2000 |
| 62.117.192.0/18 | 16.4k | RIPE NCC | ES | 31st Oct 2000 |
| 62.122.212.0/24 | 256 | RIPE NCC | RU | 17th Apr 2009 |
| 62.122.40.0/21 | 2k | RIPE NCC |  NL | 16th Feb 2009 |
| 62.129.140.0/23 | 512 | RIPE NCC | NL | 28th Jul 2000 |
| 62.129.142.0/23 | 512 | RIPE NCC | NL | 28th Jul 2000 |
| 62.129.148.0/24 | 256 | RIPE NCC | NL | 28th Jul 2000 |
| 62.129.150.0/23 | 512 | RIPE NCC | DE | 28th Jul 2000 |
| 62.129.152.0/21 | 2k | RIPE NCC | NL | 28th Jul 2000 |
| 62.130.0.0/16 | 65.5k | RIPE NCC |  GB | 18th Sept 2000 |
| 62.132.132.0/23 | 512 | RIPE NCC |  US | 1st Aug 1997 |
| 62.133.57.0/24 | 256 | RIPE NCC |  SE | 12th Feb 2020 |
| 62.136.0.0/16 | 65.5k | RIPE NCC | GB | 6th May 1997 |
| 62.137.0.0/16 | 65.5k | RIPE NCC | GB | 21st May 1999 |
| 62.138.13.0/24 | 256 | RIPE NCC | DE | 19th Sept 2000 |
| 62.138.17.0/24 | 256 | RIPE NCC | DE | 19th Sept 2000 |
| 62.138.28.0/22 | 1k | RIPE NCC | DE | 19th Sept 2000 |
| 62.138.4.0/24 | 256 | RIPE NCC | DE | 19th Sept 2000 |
| 62.138.9.0/24 | 256 | RIPE NCC | DE | 19th Sept 2000 |
| 62.152.192.0/19 | 8.2k | RIPE NCC | RU | 14th Dec 2009 |
| 62.16.80.0/20 | 4.1k | RIPE NCC |  SY | 13th Jun 2000 |
| 62.169.157.0/24 | 256 | RIPE NCC | GB | 1st Aug 2000 |
| 62.171.240.0/21 | 2k | RIPE NCC | US | 18th Aug 2000 |
| 62.173.0.0/19 | 8.2k | RIPE NCC |  MT | 14th Jul 2000 |
| 62.182.160.0/21 | 2k | RIPE NCC | UA | 31st Mar 2008 |