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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.97.40.0/22 | 1k | APNIC |  CN | 14th Jul 2017 |
| 103.97.56.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.64.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.68.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.72.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.8.0/22 | 1k | APNIC | CN | 12th Jul 2017 |
| 103.98.0.0/23 | 512 | APNIC | CN | 27th Feb 2023 |
| 103.98.100.0/22 | 1k | APNIC | CN | 3rd Aug 2017 |
| 103.98.136.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.140.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.144.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.164.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.168.0/22 | 1k | APNIC | CN | 9th Aug 2017 |
| 103.98.180.0/22 | 1k | APNIC | CN | 10th Aug 2017 |
| 103.98.196.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.216.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.224.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.228.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.232.0/22 | 1k | APNIC | CN | 14th Aug 2017 |
| 103.98.240.0/22 | 1k | APNIC | CN | 17th Aug 2017 |
| 103.98.244.0/22 | 1k | APNIC | CN | 17th Aug 2017 |
| 103.98.40.0/22 | 1k | APNIC | CN | 1st Aug 2017 |
| 103.98.48.0/22 | 1k | APNIC | CN | 1st Aug 2017 |
| 103.98.56.0/22 | 1k | APNIC | CN | 1st Aug 2017 |
| 103.98.80.0/22 | 1k | APNIC | CN | 3rd Aug 2017 |
| 103.98.88.0/22 | 1k | APNIC | CN | 3rd Aug 2017 |
| 103.99.116.0/22 | 1k | APNIC | CN | 24th Aug 2017 |
| 103.99.120.0/22 | 1k | APNIC | CN | 24th Aug 2017 |
| 103.99.152.0/22 | 1k | APNIC | CN | 25th Aug 2017 |
| 103.99.220.0/22 | 1k | APNIC | CN | 30th Aug 2017 |
| 103.99.232.0/22 | 1k | APNIC | CN | 31st Aug 2017 |
| 103.99.236.0/22 | 1k | APNIC | CN | 31st Aug 2017 |
| 103.99.56.0/22 | 1k | APNIC | CN | 21st Aug 2017 |
| 106.0.0.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 106.0.16.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 106.0.2.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 106.0.44.0/22 | 1k | APNIC | CN | 14th Jan 2016 |
| 106.0.64.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |
| 106.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 106.50.0.0/16 | 65.5k | APNIC | CN | 31st Mar 2011 |
| 110.165.32.0/19 | 8.2k | APNIC | CN | 15th Jun 2010 |
| 110.173.64.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 110.173.96.0/19 | 8.2k | APNIC | CN | 5th May 2009 |
| 110.232.32.0/19 | 8.2k | APNIC | CN | 14th May 2009 |
| 110.34.40.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 110.34.44.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 110.44.12.0/22 | 1k | APNIC | CN | 16th Dec 2015 |
| 110.44.144.0/20 | 4.1k | APNIC | CN | 11th Mar 2011 |
| 110.48.0.0/16 | 65.5k | APNIC | CN | 16th Mar 2009 |
| 110.76.132.0/22 | 1k | APNIC | CN | 19th Nov 2015 |