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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 157.66.92.0/23 | 512 | APNIC |  CN | 9th Apr 2024 |
| 157.66.94.0/23 | 512 | APNIC | CN | 10th Apr 2024 |
| 158.60.0.0/16 | 65.5k | APNIC | CN | 14th Feb 1992 |
| 158.79.0.0/16 | 65.5k | APNIC | CN | 17th Feb 1992 |
| 160.187.223.0/24 | 256 | APNIC | CN | 9th Oct 2024 |
| 160.187.252.0/23 | 512 | APNIC | CN | 11th Oct 2024 |
| 160.187.254.0/23 | 512 | APNIC | CN | 11th Oct 2024 |
| 160.19.212.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 160.19.216.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 160.19.82.0/23 | 512 | APNIC | CN | 14th May 2024 |
| 160.191.104.0/23 | 512 | APNIC | CN | 25th Oct 2024 |
| 160.191.110.0/23 | 512 | APNIC | CN | 27th Oct 2024 |
| 160.20.130.0/23 | 512 | APNIC | CN | 23rd May 2024 |
| 160.20.16.0/23 | 512 | APNIC | CN | 16th May 2024 |
| 160.20.48.0/22 | 1k | APNIC | CN | 4th Mar 2016 |
| 160.202.148.0/22 | 1k | APNIC | CN | 31st Mar 2016 |
| 160.202.216.0/22 | 1k | APNIC | CN | 2nd Apr 2016 |
| 160.202.220.0/22 | 1k | APNIC | CN | 2nd Apr 2016 |
| 160.22.148.0/23 | 512 | APNIC | CN | 14th Jun 2024 |
| 160.22.224.0/23 | 512 | APNIC | CN | 20th Jun 2024 |
| 160.22.230.0/23 | 512 | APNIC | CN | 24th Jun 2024 |
| 160.22.244.0/23 | 512 | APNIC | CN | 25th Jun 2024 |
| 160.22.246.0/23 | 512 | APNIC | CN | 25th Jun 2024 |
| 160.22.58.0/23 | 512 | APNIC | CN | 5th Jun 2024 |
| 160.22.82.0/23 | 512 | APNIC | CN | 6th Jun 2024 |
| 160.236.148.0/23 | 512 | APNIC | CN | 23rd Jul 2026 |
| 160.236.162.0/23 | 512 | APNIC | CN | 27th Jul 2026 |
| 160.236.250.0/23 | 512 | APNIC | CN | 10th Aug 2026 |
| 160.236.78.0/23 | 512 | APNIC | CN | 8th Jul 2026 |
| 160.25.10.0/23 | 512 | APNIC | CN | 27th Jun 2024 |
| 160.25.12.0/23 | 512 | APNIC | CN | 27th Jun 2024 |
| 160.250.102.0/23 | 512 | APNIC | CN | 27th Nov 2024 |
| 160.250.104.0/23 | 512 | APNIC | CN | 28th Nov 2024 |
| 160.250.16.0/23 | 512 | APNIC | CN | 15th Nov 2024 |
| 160.250.160.0/23 | 512 | APNIC | CN | 3rd Dec 2024 |
| 160.250.170.0/23 | 512 | APNIC | CN | 5th Dec 2024 |
| 160.250.18.0/23 | 512 | APNIC | CN | 15th Nov 2024 |
| 160.250.214.0/23 | 512 | APNIC | CN | 12th Dec 2024 |
| 160.250.252.0/23 | 512 | APNIC | CN | 20th Dec 2024 |
| 160.250.90.0/23 | 512 | APNIC | CN | 27th Nov 2024 |
| 160.30.194.0/23 | 512 | APNIC | CN | 27th Aug 2024 |
| 160.30.196.0/23 | 512 | APNIC | CN | 27th Aug 2024 |
| 160.30.198.0/23 | 512 | APNIC | CN | 27th Aug 2024 |
| 160.30.40.0/23 | 512 | APNIC | CN | 30th Jul 2024 |
| 161.248.110.0/23 | 512 | APNIC | CN | 7th Jan 2025 |
| 161.248.20.0/23 | 512 | APNIC | CN | 23rd Dec 2024 |
| 161.248.42.0/23 | 512 | APNIC | CN | 26th Dec 2024 |
| 161.248.92.0/23 | 512 | APNIC | CN | 3rd Jan 2025 |
| 162.4.168.0/23 | 512 | APNIC | CN | 22nd May 2026 |
| 162.4.198.0/23 | 512 | APNIC | CN | 28th May 2026 |