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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 43.226.168.0/22 | 1k | APNIC |  CN | 15th Dec 2014 |
| 43.226.172.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.176.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.180.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.184.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.188.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.192.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.196.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.200.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.204.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.208.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.212.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 43.226.224.0/22 | 1k | RIPE NCC |  AE | 28th Mar 2019 |
| 43.226.240.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 43.226.244.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 43.226.248.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 43.226.252.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 43.226.8.0/22 | 1k | APNIC |  BT | 12th Dec 2014 |
| 43.226.80.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 43.226.84.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 43.226.88.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 43.226.92.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 43.226.96.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 43.227.0.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 43.227.100.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.136.0/22 | 1k | APNIC | CN | 22nd Dec 2014 |
| 43.227.144.0/22 | 1k | APNIC | CN | 22nd Dec 2014 |
| 43.227.148.0/22 | 1k | APNIC |  ID | 22nd Dec 2014 |
| 43.227.188.0/22 | 1k | APNIC | CN | 22nd Dec 2014 |
| 43.227.232.0/22 | 1k | APNIC | CN | 24th Dec 2014 |
| 43.227.240.0/22 | 1k | APNIC |  SG | 24th Dec 2014 |
| 43.227.248.0/22 | 1k | APNIC | CN | 24th Dec 2014 |
| 43.227.28.0/22 | 1k | APNIC |  HK | 18th Dec 2014 |
| 43.227.32.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.36.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.4.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 43.227.40.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.44.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.48.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.52.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.72.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.76.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.227.8.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 43.227.96.0/22 | 1k | APNIC | CN | 18th Dec 2014 |
| 43.228.100.0/22 | 1k | APNIC | CN | 30th Dec 2014 |
| 43.228.116.0/22 | 1k | APNIC | CN | 31st Dec 2014 |
| 43.228.120.0/22 | 1k | APNIC | CN | 31st Dec 2014 |
| 43.228.132.0/22 | 1k | APNIC | CN | 31st Dec 2014 |
| 43.228.136.0/22 | 1k | APNIC | CN | 31st Dec 2014 |
| 43.228.148.0/22 | 1k | APNIC | CN | 4th Jan 2015 |