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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.244.84.0/22 | 1k | APNIC |  CN | 12th Dec 2012 |
| 103.245.124.0/22 | 1k | APNIC | CN | 11th Jan 2013 |
| 103.245.23.0/24 | 256 | APNIC | CN | 7th Jan 2013 |
| 103.245.52.0/22 | 1k | APNIC | CN | 7th Jan 2013 |
| 103.245.60.0/22 | 1k | APNIC | CN | 8th Jan 2013 |
| 103.245.80.0/22 | 1k | APNIC | CN | 22nd Jan 2013 |
| 103.246.12.0/22 | 1k | APNIC | CN | 29th Jun 2011 |
| 103.246.120.0/22 | 1k | APNIC | CN | 17th May 2011 |
| 103.246.124.0/22 | 1k | APNIC | CN | 17th May 2011 |
| 103.246.132.0/22 | 1k | APNIC | CN | 23rd Aug 2011 |
| 103.246.8.0/22 | 1k | APNIC | CN | 29th Jun 2011 |
| 103.247.172.0/22 | 1k | APNIC | CN | 1st Feb 2012 |
| 103.247.200.0/22 | 1k | APNIC | CN | 6th Feb 2012 |
| 103.247.212.0/22 | 1k | APNIC | CN | 7th Feb 2012 |
| 103.248.0.0/23 | 512 | APNIC | CN | 10th May 2013 |
| 103.248.100.0/22 | 1k | APNIC | CN | 17th May 2013 |
| 103.248.124.0/22 | 1k | APNIC | CN | 20th May 2013 |
| 103.248.168.0/22 | 1k | APNIC | CN | 21st May 2013 |
| 103.248.192.0/22 | 1k | APNIC | CN | 23rd May 2013 |
| 103.248.212.0/22 | 1k | APNIC | CN | 24th May 2013 |
| 103.249.12.0/22 | 1k | APNIC | CN | 28th May 2013 |
| 103.249.128.0/22 | 1k | APNIC | CN | 6th Jun 2013 |
| 103.249.144.0/22 | 1k | APNIC | CN | 6th Jun 2013 |
| 103.249.164.0/22 | 1k | APNIC | CN | 7th Jun 2013 |
| 103.249.168.0/22 | 1k | APNIC | CN | 7th Jun 2013 |
| 103.249.172.0/22 | 1k | APNIC | CN | 7th Jun 2013 |
| 103.249.176.0/22 | 1k | APNIC | CN | 7th Jun 2013 |
| 103.249.188.0/22 | 1k | APNIC | CN | 7th Jun 2013 |
| 103.249.192.0/22 | 1k | APNIC | CN | 7th Jun 2013 |
| 103.249.52.0/22 | 1k | APNIC | CN | 31st May 2013 |
| 103.249.8.0/22 | 1k | APNIC | CN | 6th Nov 2015 |
| 103.25.148.0/22 | 1k | APNIC | CN | 2nd May 2013 |
| 103.25.216.0/22 | 1k | APNIC | CN | 8th May 2013 |
| 103.25.28.0/22 | 1k | APNIC | CN | 26th Apr 2013 |
| 103.25.32.0/22 | 1k | APNIC | CN | 26th Apr 2013 |
| 103.25.40.0/22 | 1k | APNIC | CN | 26th Apr 2013 |
| 103.25.48.0/22 | 1k | APNIC | CN | 26th Apr 2013 |
| 103.25.68.0/22 | 1k | APNIC | CN | 29th Apr 2013 |
| 103.250.180.0/22 | 1k | APNIC | CN | 19th Jul 2013 |
| 103.250.224.0/22 | 1k | APNIC | CN | 23rd Jul 2013 |
| 103.250.236.0/22 | 1k | APNIC | CN | 24th Jul 2013 |
| 103.251.192.0/22 | 1k | APNIC | CN | 10th Nov 2015 |
| 103.252.104.0/22 | 1k | APNIC | CN | 25th Oct 2013 |
| 103.252.204.0/22 | 1k | APNIC | CN | 4th Nov 2013 |
| 103.252.208.0/22 | 1k | APNIC | CN | 4th Nov 2013 |
| 103.252.232.0/22 | 1k | APNIC | CN | 5th Nov 2013 |
| 103.252.248.0/22 | 1k | APNIC | CN | 6th Nov 2013 |
| 103.252.28.0/22 | 1k | APNIC | CN | 22nd Oct 2013 |
| 103.252.64.0/22 | 1k | APNIC | CN | 24th Oct 2013 |
| 103.252.96.0/22 | 1k | APNIC | CN | 29th Jun 2016 |