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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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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 |
|---|---|---|---|---|
| 103.33.124.0/22 | 1k | APNIC |  CN | 19th Aug 2014 |
| 103.33.128.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 103.33.132.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.136.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.140.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.144.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.148.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.152.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.156.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.16.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.160.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.164.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.168.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.172.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.176.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.180.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.184.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.188.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.192.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.196.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.20.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.200.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.204.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.208.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.212.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.216.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.220.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.224.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.228.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 103.33.232.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.33.236.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.33.24.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.240.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.33.244.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.33.248.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.33.252.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.33.28.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.32.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.36.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.4.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.40.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.44.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.48.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.33.52.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.56.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.60.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.64.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.68.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.72.0/22 | 1k | APNIC | CN | 18th Aug 2014 |
| 103.33.76.0/22 | 1k | APNIC | CN | 18th Aug 2014 |