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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.150.56.0/22 | 1k | APNIC |  CN | 14th Apr 2011 |
| 202.151.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.151.128.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.151.33.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.152.176.0/20 | 4.1k | APNIC | CN | 15th Aug 2005 |
| 202.153.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.153.7.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.157.192.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.158.242.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.160.156.0/22 | 1k | APNIC | CN | 15th Dec 2015 |
| 202.162.67.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.162.75.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.164.96.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.165.176.0/20 | 4.1k | APNIC | CN | 22nd Aug 2006 |
| 202.165.239.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.165.240.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.165.243.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.165.245.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.165.251.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.165.252.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.166.224.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.168.128.0/22 | 1k | APNIC | CN | 16th Dec 2015 |
| 202.168.132.0/22 | 1k | APNIC | CN | 16th Dec 2015 |
| 202.168.136.0/22 | 1k | APNIC | CN | 16th Dec 2015 |
| 202.168.140.0/22 | 1k | APNIC | CN | 16th Dec 2015 |
| 202.168.80.0/22 | 1k | APNIC | CN | 10th Nov 2015 |
| 202.170.224.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.171.216.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.171.232.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.171.235.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.172.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.172.7.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.173.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.173.112.0/22 | 1k | APNIC | CN | 25th Sept 2015 |
| 202.173.6.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.174.124.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 202.174.64.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.176.224.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.179.160.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.179.164.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.179.168.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.179.172.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.180.128.0/19 | 8.2k | APNIC | CN | 10th May 2005 |
| 202.180.208.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.181.8.0/22 | 1k | APNIC | CN | 17th Dec 2015 |
| 202.182.192.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.182.32.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.189.184.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.189.80.0/20 | 4.1k | APNIC | CN | 29th Nov 2005 |
| 202.191.0.0/24 | 256 | APNIC | CN | 14th Apr 2011 |