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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 162.4.202.0/23 | 512 | APNIC |  CN | 1st Jun 2026 |
| 162.4.230.0/23 | 512 | APNIC | CN | 10th Jun 2026 |
| 162.4.54.0/23 | 512 | APNIC | CN | 29th Apr 2026 |
| 163.128.152.0/23 | 512 | APNIC | CN | 3rd Apr 2026 |
| 163.128.236.0/23 | 512 | APNIC | CN | 15th Apr 2026 |
| 163.128.30.0/23 | 512 | APNIC | CN | 9th Mar 2026 |
| 163.223.124.0/23 | 512 | APNIC | CN | 17th Mar 2025 |
| 163.223.222.0/23 | 512 | APNIC | CN | 1st Apr 2025 |
| 163.223.28.0/23 | 512 | APNIC | CN | 6th Mar 2025 |
| 163.223.32.0/23 | 512 | APNIC | CN | 6th Mar 2025 |
| 163.227.34.0/23 | 512 | APNIC | CN | 9th Apr 2025 |
| 163.227.74.0/23 | 512 | APNIC | CN | 16th Apr 2025 |
| 163.227.76.0/23 | 512 | APNIC | CN | 16th Apr 2025 |
| 163.227.78.0/23 | 512 | APNIC | CN | 16th Apr 2025 |
| 163.227.80.0/23 | 512 | APNIC | CN | 16th Apr 2025 |
| 163.52.28.0/23 | 512 | APNIC | CN | 19th Aug 2026 |
| 163.53.0.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 163.53.100.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.104.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.108.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.112.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.116.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.12.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 163.53.120.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.124.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.132.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.136.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.160.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.164.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.172.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.188.0/22 | 1k | APNIC | CN | 11th Jul 2014 |
| 163.53.240.0/22 | 1k | APNIC | CN | 14th Jul 2014 |
| 163.53.36.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.4.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 163.53.40.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.48.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.52.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.56.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.64.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.8.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 163.53.96.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 165.101.144.0/23 | 512 | APNIC | CN | 7th Jul 2025 |
| 165.101.170.0/23 | 512 | APNIC | CN | 10th Jul 2025 |
| 165.101.244.0/23 | 512 | APNIC | CN | 22nd Jul 2025 |
| 165.101.4.0/23 | 512 | APNIC | CN | 13th Jun 2025 |
| 165.101.66.0/23 | 512 | APNIC | CN | 25th Jun 2025 |
| 167.189.0.0/16 | 65.5k | APNIC | CN | 16th Sept 1993 |
| 170.179.0.0/16 | 65.5k | APNIC | CN | 7th Mar 1994 |
| 175.106.128.0/17 | 32.8k | APNIC | CN | 5th Jan 2010 |
| 175.111.144.0/22 | 1k | APNIC | CN | 29th Jan 2016 |