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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 43.239.0.0/22 | 1k | APNIC |  CN | 23rd Aug 2014 |
| 43.239.116.0/22 | 1k | APNIC | CN | 12th Aug 2015 |
| 43.239.12.0/22 | 1k | APNIC | CN | 1st Aug 2014 |
| 43.239.124.0/22 | 1k | APNIC |  IN | 12th Aug 2015 |
| 43.239.128.0/22 | 1k | APNIC | IN | 12th Aug 2015 |
| 43.239.132.0/22 | 1k | APNIC | IN | 12th Aug 2015 |
| 43.239.144.0/22 | 1k | APNIC | IN | 13th Aug 2015 |
| 43.239.152.0/22 | 1k | APNIC | IN | 13th Aug 2015 |
| 43.239.16.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.168.0/22 | 1k | APNIC | IN | 14th Aug 2015 |
| 43.239.184.0/22 | 1k | APNIC |  VN | 17th Aug 2015 |
| 43.239.20.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.208.0/22 | 1k | APNIC | IN | 18th Aug 2015 |
| 43.239.216.0/22 | 1k | APNIC | IN | 18th Aug 2015 |
| 43.239.228.0/22 | 1k | APNIC | IN | 18th Aug 2015 |
| 43.239.236.0/22 | 1k | APNIC | IN | 18th Aug 2015 |
| 43.239.24.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.240.0/22 | 1k | APNIC | IN | 18th Aug 2015 |
| 43.239.244.0/22 | 1k | APNIC | IN | 18th Aug 2015 |
| 43.239.248.0/24 | 256 | APNIC |  JP | 19th Aug 2015 |
| 43.239.250.0/24 | 256 | APNIC |  NZ | 19th Aug 2015 |
| 43.239.28.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.32.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.36.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.4.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.40.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 43.239.44.0/22 | 1k | APNIC | CN | 26th Aug 2014 |
| 43.239.48.0/22 | 1k | APNIC | CN | 26th Aug 2014 |
| 43.239.56.0/22 | 1k | APNIC | IN | 7th Aug 2015 |
| 43.239.64.0/22 | 1k | APNIC |  HK | 10th Aug 2015 |
| 43.239.8.0/22 | 1k | APNIC | CN | 1st Aug 2014 |
| 43.239.80.0/22 | 1k | APNIC | IN | 10th Aug 2015 |
| 43.240.108.0/22 | 1k | APNIC |  TW | 14th Aug 2014 |
| 43.240.152.0/22 | 1k | APNIC | TW | 15th Aug 2014 |
| 43.240.160.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.164.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.168.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.172.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.176.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.180.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.184.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.188.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 43.240.208.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 43.240.212.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 43.240.216.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 43.240.240.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 43.240.244.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 43.240.248.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 43.240.252.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 43.240.68.0/22 | 1k | APNIC | CN | 13th Aug 2014 |