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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 110.36.240.0/20 | 4.1k | APNIC |  PK | 24th Feb 2009 |
| 110.36.32.0/20 | 4.1k | APNIC | PK | 24th Feb 2009 |
| 110.36.48.0/21 | 2k | APNIC | PK | 24th Feb 2009 |
| 110.36.57.0/24 | 256 | APNIC |  AU | 24th Feb 2009 |
| 110.4.108.0/22 | 1k | APNIC |  KR | 23rd Feb 2009 |
| 110.4.112.0/20 | 4.1k | APNIC | KR | 23rd Feb 2009 |
| 110.4.64.0/20 | 4.1k | APNIC | KR | 23rd Feb 2009 |
| 110.4.80.0/21 | 2k | APNIC | KR | 23rd Feb 2009 |
| 110.4.92.0/22 | 1k | APNIC | KR | 23rd Feb 2009 |
| 110.4.96.0/21 | 2k | APNIC | KR | 23rd Feb 2009 |
| 110.44.104.0/22 | 1k | APNIC |  IN | 19th Sept 2018 |
| 110.44.12.0/22 | 1k | APNIC |  CN | 16th Dec 2015 |
| 110.44.144.0/20 | 4.1k | APNIC | CN | 11th Mar 2011 |
| 110.44.184.0/21 | 2k | APNIC |  VN | 17th Mar 2009 |
| 110.48.0.0/16 | 65.5k | APNIC | CN | 16th Mar 2009 |
| 110.50.128.0/18 | 16.4k | APNIC |  TW | 23rd Mar 2009 |
| 110.55.0.0/16 | 65.5k | APNIC |  PH | 25th Mar 2009 |
| 110.74.0.0/19 | 8.2k | APNIC |  JP | 27th Mar 2009 |
| 110.74.117.0/24 | 256 | APNIC | JP | 27th Mar 2009 |
| 110.74.118.0/23 | 512 | APNIC | JP | 27th Mar 2009 |
| 110.74.120.0/24 | 256 | APNIC | JP | 27th Mar 2009 |
| 110.74.124.0/23 | 512 | APNIC | JP | 27th Mar 2009 |
| 110.76.132.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 110.76.136.0/22 | 1k | APNIC | AU | 5th Apr 2011 |
| 110.76.140.0/22 | 1k | APNIC | KR | 12th Jan 2011 |
| 110.92.68.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 110.92.76.0/22 | 1k | APNIC |  HK | 20th Apr 2009 |
| 110.93.32.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 110.94.0.0/15 | 131k | APNIC | CN | 15th Apr 2009 |
| 111.119.0.0/19 | 8.2k | APNIC | JP | 2nd Jul 2009 |
| 111.119.128.0/19 | 8.2k | APNIC | CN | 3rd Jul 2009 |
| 111.119.64.0/18 | 16.4k | APNIC | CN | 3rd Jul 2009 |
| 111.125.214.0/23 | 512 | APNIC | IN | 7th Jul 2009 |
| 111.125.238.0/23 | 512 | APNIC | IN | 7th Jul 2009 |
| 111.221.32.0/21 | 2k | APNIC | KR | 14th Jul 2009 |
| 111.221.56.0/22 | 1k | APNIC | HK | 17th Jul 2009 |
| 111.221.60.0/22 | 1k | APNIC | JP | 24th Jul 2009 |
| 111.223.16.0/22 | 1k | APNIC | CN | 8th Jan 2016 |
| 111.223.192.0/19 | 8.2k | APNIC | JP | 20th Jul 2009 |
| 111.223.240.0/22 | 1k | APNIC | CN | 19th Apr 2010 |
| 111.223.248.0/22 | 1k | APNIC | CN | 19th Apr 2010 |
| 111.223.4.0/22 | 1k | APNIC | CN | 8th Jan 2016 |
| 111.234.120.0/21 | 2k | APNIC | JP | 7th Aug 2009 |
| 111.234.192.0/20 | 4.1k | APNIC | JP | 7th Aug 2009 |
| 111.234.208.0/21 | 2k | APNIC | JP | 7th Aug 2009 |
| 111.234.216.0/23 | 512 | APNIC | JP | 7th Aug 2009 |
| 111.234.246.0/23 | 512 | APNIC | JP | 7th Aug 2009 |
| 111.234.248.0/21 | 2k | APNIC | JP | 7th Aug 2009 |
| 111.234.48.0/22 | 1k | APNIC | JP | 7th Aug 2009 |
| 111.235.144.0/22 | 1k | APNIC | AU | 18th Aug 2009 |