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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks in China
6,720 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.214.84.0/22 | 1k | APNIC |  CN | 11th Apr 2016 |
| 103.215.100.0/22 | 1k | APNIC | CN | 21st Apr 2016 |
| 103.215.108.0/22 | 1k | APNIC | CN | 21st Apr 2016 |
| 103.215.116.0/22 | 1k | APNIC | CN | 21st Apr 2016 |
| 103.215.120.0/22 | 1k | APNIC | CN | 21st Apr 2016 |
| 103.215.28.0/22 | 1k | APNIC | CN | 19th Apr 2016 |
| 103.215.32.0/22 | 1k | APNIC | CN | 19th Apr 2016 |
| 103.216.108.0/22 | 1k | APNIC | CN | 29th Apr 2016 |
| 103.216.12.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.156.0/23 | 512 | APNIC | CN | 18th Aug 2023 |
| 103.216.16.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.20.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.224.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.216.24.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.240.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.216.244.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.216.248.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.216.28.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.32.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.36.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.4.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.40.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.44.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.216.64.0/22 | 1k | APNIC | CN | 28th Apr 2016 |
| 103.216.8.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 103.217.0.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.12.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.16.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.168.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 103.217.180.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 103.217.20.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.24.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.28.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.32.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.36.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.4.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.40.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.44.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.48.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.52.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.56.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.60.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.217.8.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 103.218.12.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.16.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.178.0/23 | 512 | APNIC | CN | 15th Sept 2023 |
| 103.218.192.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 103.218.196.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 103.218.20.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.200.0/22 | 1k | APNIC | CN | 13th May 2016 |