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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 43.250.160.0/22 | 1k | APNIC |  CN | 28th Oct 2014 |
| 43.250.176.0/22 | 1k | APNIC | CN | 29th Oct 2014 |
| 43.250.180.0/23 | 512 | APNIC | CN | 31st Oct 2023 |
| 43.250.20.0/22 | 1k | APNIC | CN | 21st Oct 2014 |
| 43.250.212.0/22 | 1k | APNIC | CN | 31st Oct 2014 |
| 43.250.216.0/22 | 1k | APNIC | CN | 31st Oct 2014 |
| 43.250.220.0/22 | 1k | APNIC | CN | 31st Oct 2014 |
| 43.250.28.0/22 | 1k | APNIC | CN | 21st Oct 2014 |
| 43.250.36.0/22 | 1k | APNIC | CN | 21st Oct 2014 |
| 43.251.192.0/22 | 1k | APNIC | CN | 13th Nov 2014 |
| 43.252.56.0/22 | 1k | APNIC | CN | 5th Jun 2014 |
| 43.254.112.0/22 | 1k | APNIC | CN | 24th Jul 2014 |
| 43.254.128.0/22 | 1k | APNIC | CN | 24th Jul 2014 |
| 43.254.180.0/22 | 1k | APNIC | CN | 25th Jul 2014 |
| 43.254.184.0/22 | 1k | APNIC | CN | 25th Jul 2014 |
| 43.254.188.0/22 | 1k | APNIC | CN | 25th Jul 2014 |
| 43.254.196.0/22 | 1k | APNIC | CN | 25th Jul 2014 |
| 43.254.208.0/22 | 1k | APNIC | CN | 25th Jul 2014 |
| 43.254.36.0/22 | 1k | APNIC | CN | 22nd Jul 2014 |
| 43.254.4.0/22 | 1k | APNIC | CN | 20th Jul 2014 |
| 43.254.72.0/22 | 1k | APNIC | CN | 23rd Jul 2014 |
| 43.254.84.0/22 | 1k | APNIC | CN | 23rd Jul 2014 |
| 43.254.92.0/22 | 1k | APNIC | CN | 23rd Jul 2014 |
| 43.255.144.0/22 | 1k | APNIC | CN | 6th Aug 2014 |
| 43.255.176.0/22 | 1k | APNIC | CN | 7th Aug 2014 |
| 43.255.192.0/22 | 1k | APNIC | CN | 7th Aug 2014 |
| 43.255.204.0/22 | 1k | APNIC | CN | 7th Aug 2014 |
| 43.255.208.0/22 | 1k | APNIC | CN | 7th Aug 2014 |
| 43.255.232.0/22 | 1k | APNIC | CN | 7th Aug 2014 |
| 43.255.244.0/22 | 1k | APNIC | CN | 8th Aug 2014 |
| 43.255.4.0/22 | 1k | APNIC | CN | 29th Jul 2014 |
| 43.255.48.0/22 | 1k | APNIC | CN | 30th Jul 2014 |
| 43.255.64.0/22 | 1k | APNIC | CN | 31st Jul 2014 |
| 43.255.72.0/22 | 1k | APNIC | CN | 31st Jul 2014 |
| 43.255.76.0/22 | 1k | APNIC | CN | 31st Jul 2014 |
| 43.255.8.0/22 | 1k | APNIC | CN | 29th Jul 2014 |
| 45.112.132.0/22 | 1k | APNIC | CN | 2nd Mar 2015 |
| 45.112.188.0/22 | 1k | APNIC | CN | 4th Mar 2015 |
| 45.112.208.0/22 | 1k | APNIC | CN | 6th Mar 2015 |
| 45.112.212.0/22 | 1k | APNIC | CN | 6th Mar 2015 |
| 45.112.216.0/22 | 1k | APNIC | CN | 6th Mar 2015 |
| 45.112.220.0/22 | 1k | APNIC | CN | 6th Mar 2015 |
| 45.112.228.0/22 | 1k | APNIC | CN | 6th Mar 2015 |
| 45.112.236.0/22 | 1k | APNIC | CN | 6th Mar 2015 |
| 45.113.12.0/22 | 1k | APNIC | CN | 11th Mar 2015 |
| 45.113.144.0/22 | 1k | APNIC | CN | 20th Mar 2015 |
| 45.113.148.0/22 | 1k | APNIC | CN | 20th Mar 2015 |
| 45.113.16.0/22 | 1k | APNIC | CN | 11th Mar 2015 |
| 45.113.168.0/22 | 1k | APNIC | CN | 23rd Mar 2015 |
| 45.113.176.0/22 | 1k | APNIC | CN | 23rd Mar 2015 |