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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with unannounced space registered through APNIC, largest first.
Unannounced blocks in China
6,720 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 240c:8000::/21 | 8.8T × /64 | APNIC |  CN | 5th Sept 2014 |
| 240d:8000::/24 | 1.1T × /64 | APNIC | CN | 5th Feb 2015 |
| 240e:1000::/20 | 17.6T × /64 | APNIC | CN | 27th Dec 2018 |
| 240e:2000::/19 | 35.2T × /64 | APNIC | CN | 27th Dec 2018 |
| 240f:4000::/24 | 1.1T × /64 | APNIC | CN | 9th Jul 2019 |
| 240f:8000::/24 | 1.1T × /64 | APNIC | CN | 27th Apr 2015 |
| 240f:c000::/24 | 1.1T × /64 | APNIC | CN | 17th Sept 2019 |
| 27.0.160.0/22 | 1k | APNIC | CN | 1st Feb 2016 |
| 27.0.188.0/22 | 1k | APNIC | CN | 1st Feb 2016 |
| 27.103.0.0/16 | 65.5k | APNIC | CN | 28th May 2010 |
| 27.106.128.0/18 | 16.4k | APNIC | CN | 8th Jun 2010 |
| 27.109.32.0/19 | 8.2k | APNIC | CN | 7th Mar 2011 |
| 27.112.112.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 27.112.116.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 27.112.80.0/20 | 4.1k | APNIC | CN | 5th Jul 2010 |
| 27.113.128.0/18 | 16.4k | APNIC | CN | 8th Jul 2010 |
| 27.116.44.0/22 | 1k | APNIC | CN | 19th Jul 2010 |
| 27.121.120.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 27.121.72.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 27.131.220.0/22 | 1k | APNIC | CN | 29th Apr 2010 |
| 27.34.232.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 27.50.40.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 27.54.152.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 27.54.192.0/18 | 16.4k | APNIC | CN | 25th Mar 2010 |
| 27.54.72.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 27.98.208.0/20 | 4.1k | APNIC | CN | 25th May 2010 |
| 36.0.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 36.0.128.0/17 | 32.8k | APNIC | CN | 9th Mar 2011 |
| 36.0.16.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 36.0.32.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 36.0.64.0/18 | 16.4k | APNIC | CN | 11th Mar 2011 |
| 36.0.8.0/21 | 2k | APNIC | CN | 28th Jan 2011 |
| 36.254.0.0/16 | 65.5k | APNIC | CN | 31st Jan 2011 |
| 36.255.172.0/22 | 1k | APNIC | CN | 22nd Feb 2016 |
| 36.255.176.0/22 | 1k | APNIC | CN | 22nd Feb 2016 |
| 36.37.0.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 36.37.36.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 36.37.39.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 36.37.40.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 36.37.48.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 36.50.254.0/23 | 512 | APNIC | CN | 28th Dec 2023 |
| 39.0.0.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 39.0.128.0/17 | 32.8k | APNIC | CN | 12th Apr 2011 |
| 39.0.16.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 39.0.2.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 39.0.32.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 39.0.4.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 39.0.64.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |
| 39.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 42.0.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |