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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in China
6,735 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 119.30.48.0/20 | 4.1k | APNIC |  CN | 19th Dec 2007 |
| 119.37.128.0/18 | 16.4k | APNIC | CN | 27th Dec 2007 |
| 119.38.128.0/18 | 16.4k | APNIC | CN | 27th Dec 2007 |
| 119.38.224.0/19 | 8.2k | APNIC | CN | 31st Dec 2007 |
| 119.42.128.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 119.44.64.0/18 | 16.4k | APNIC | CN | 3rd Jan 2008 |
| 119.58.0.0/16 | 65.5k | APNIC | CN | 11th Jan 2008 |
| 119.59.128.0/17 | 32.8k | APNIC | CN | 18th Jan 2008 |
| 119.63.32.0/19 | 8.2k | APNIC | CN | 21st Jan 2008 |
| 119.82.208.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 120.137.0.0/17 | 32.8k | APNIC | CN | 9th Apr 2008 |
| 120.143.128.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 120.30.0.0/16 | 65.5k | APNIC | CN | 18th Mar 2008 |
| 120.88.8.0/21 | 2k | APNIC | CN | 31st Mar 2009 |
| 120.90.0.0/15 | 131k | APNIC | CN | 28th Mar 2008 |
| 121.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.100.128.0/17 | 32.8k | APNIC | CN | 3rd Jul 2006 |
| 121.101.0.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |
| 121.101.208.0/20 | 4.1k | APNIC | CN | 20th Nov 2007 |
| 121.200.192.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.46.76.0/22 | 1k | APNIC | CN | 26th Jan 2016 |
| 121.47.0.0/16 | 65.5k | APNIC | CN | 22nd Jun 2006 |
| 121.50.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.54.176.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.58.136.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.58.160.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 122.0.128.0/17 | 32.8k | APNIC | CN | 7th Jul 2006 |
| 122.10.164.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.168.0/21 | 2k | APNIC | CN | 14th Aug 2006 |
| 122.10.176.0/20 | 4.1k | APNIC | CN | 14th Aug 2006 |
| 122.10.192.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.208.0/21 | 2k | APNIC | CN | 14th Aug 2006 |
| 122.10.216.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.228.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.232.0/21 | 2k | APNIC | CN | 14th Aug 2006 |
| 122.10.240.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.102.0.0/20 | 4.1k | APNIC | CN | 31st Oct 2006 |
| 122.102.80.0/20 | 4.1k | APNIC | CN | 3rd Nov 2006 |
| 122.115.128.0/19 | 8.2k | APNIC | CN | 18th Sept 2007 |
| 122.115.16.0/20 | 4.1k | APNIC | CN | 18th Sept 2007 |
| 122.115.160.0/19 | 8.2k | APNIC | CN | 18th Sept 2007 |
| 122.115.192.0/19 | 8.2k | APNIC | CN | 18th Sept 2007 |
| 122.115.240.0/20 | 4.1k | APNIC | CN | 18th Sept 2007 |
| 122.12.0.0/16 | 65.5k | APNIC | CN | 14th Aug 2006 |
| 122.128.100.0/22 | 1k | APNIC | CN | 17th Nov 2015 |
| 122.128.120.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 122.198.0.0/18 | 16.4k | APNIC | CN | 27th Jul 2006 |
| 122.198.128.0/17 | 32.8k | APNIC | CN | 27th Jul 2006 |
| 122.198.64.0/22 | 1k | APNIC | CN | 27th Jul 2006 |
| 122.198.68.0/22 | 1k | APNIC | CN | 27th Jul 2006 |