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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.33.8.0/22 | 1k | APNIC |  CN | 15th Aug 2014 |
| 103.33.80.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.84.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.88.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.92.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 103.33.96.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 103.34.0.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.100.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.104.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.108.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.112.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.116.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.12.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.120.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.124.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.128.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.132.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.136.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.140.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.144.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.148.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.152.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.156.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.16.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.160.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.164.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.168.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.172.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.176.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.180.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.184.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.188.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.192.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.196.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.20.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.200.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.204.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.208.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.212.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.216.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.220.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.224.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.228.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.232.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.236.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.24.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.240.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.244.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.248.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.34.252.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |