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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.55.204.0/22 | 1k | APNIC |  CN | 23rd Apr 2015 |
| 103.55.208.0/22 | 1k | APNIC | CN | 23rd Apr 2015 |
| 103.55.236.0/22 | 1k | APNIC | CN | 24th Apr 2015 |
| 103.55.80.0/22 | 1k | APNIC | CN | 17th Apr 2015 |
| 103.56.140.0/22 | 1k | APNIC | CN | 4th May 2015 |
| 103.56.184.0/22 | 1k | APNIC | CN | 6th May 2015 |
| 103.56.20.0/22 | 1k | APNIC | CN | 27th Apr 2015 |
| 103.56.200.0/22 | 1k | APNIC | CN | 6th May 2015 |
| 103.56.32.0/22 | 1k | APNIC | CN | 27th Apr 2015 |
| 103.56.56.0/22 | 1k | APNIC | CN | 28th Apr 2015 |
| 103.56.72.0/22 | 1k | APNIC | CN | 29th Apr 2015 |
| 103.56.94.0/23 | 512 | APNIC | CN | 21st Dec 2022 |
| 103.57.196.0/22 | 1k | APNIC | CN | 20th May 2015 |
| 103.57.52.0/22 | 1k | APNIC | CN | 13th May 2015 |
| 103.57.56.0/22 | 1k | APNIC | CN | 13th May 2015 |
| 103.57.76.0/22 | 1k | APNIC | CN | 14th May 2015 |
| 103.58.24.0/22 | 1k | APNIC | CN | 22nd May 2015 |
| 103.59.116.0/22 | 1k | APNIC | CN | 3rd Jun 2015 |
| 103.59.128.0/22 | 1k | APNIC | CN | 3rd Jun 2015 |
| 103.59.164.0/22 | 1k | APNIC | CN | 5th Jun 2015 |
| 103.59.76.0/22 | 1k | APNIC | CN | 2nd Jun 2015 |
| 103.6.76.0/22 | 1k | APNIC | CN | 21st Feb 2012 |
| 103.60.44.0/22 | 1k | APNIC | CN | 10th Jun 2015 |
| 103.61.140.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.156.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.160.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.172.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.61.176.0/22 | 1k | APNIC | CN | 29th Jun 2015 |
| 103.62.100.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.104.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.108.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.112.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.116.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.120.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.124.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.128.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.132.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 103.62.156.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.160.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.164.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.168.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.172.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.176.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.180.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.184.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.188.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.192.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.204.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.208.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 103.62.212.0/22 | 1k | APNIC | CN | 8th Jul 2015 |