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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 45.125.76.0/22 | 1k | APNIC |  CN | 3rd Aug 2015 |
| 45.125.80.0/22 | 1k | APNIC | CN | 3rd Aug 2015 |
| 45.125.84.0/22 | 1k | APNIC | CN | 3rd Aug 2015 |
| 45.125.88.0/22 | 1k | APNIC | CN | 3rd Aug 2015 |
| 45.125.92.0/22 | 1k | APNIC | CN | 3rd Aug 2015 |
| 45.125.96.0/22 | 1k | APNIC | CN | 3rd Aug 2015 |
| 45.126.100.0/22 | 1k | APNIC | CN | 1st Sept 2015 |
| 45.126.108.0/22 | 1k | APNIC | CN | 2nd Sept 2015 |
| 45.126.116.0/22 | 1k | APNIC | CN | 2nd Sept 2015 |
| 45.126.212.0/22 | 1k | APNIC | CN | 8th Sept 2015 |
| 45.126.220.0/22 | 1k | APNIC | CN | 9th Sept 2015 |
| 45.126.48.0/22 | 1k | APNIC | CN | 27th Aug 2015 |
| 45.126.52.0/22 | 1k | APNIC | CN | 28th Aug 2015 |
| 45.127.12.0/22 | 1k | APNIC | CN | 11th Sept 2015 |
| 45.127.156.0/22 | 1k | APNIC | CN | 18th Sept 2015 |
| 45.127.8.0/22 | 1k | APNIC | CN | 11th Sept 2015 |
| 45.248.100.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 45.248.104.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 45.248.128.0/22 | 1k | APNIC | CN | 5th May 2016 |
| 45.248.132.0/22 | 1k | APNIC | CN | 5th May 2016 |
| 45.248.208.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.212.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.216.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.220.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.224.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.228.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.232.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.236.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.240.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.244.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.248.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.252.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.248.80.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 45.248.84.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 45.248.96.0/22 | 1k | APNIC | CN | 4th May 2016 |
| 45.249.0.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.249.112.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 45.249.12.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.249.16.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.249.188.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 45.249.192.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 45.249.196.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 45.249.20.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.249.200.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 45.249.204.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 45.249.208.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 45.249.24.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.249.28.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.249.32.0/22 | 1k | APNIC | CN | 9th May 2016 |
| 45.249.36.0/22 | 1k | APNIC | CN | 9th May 2016 |