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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.44.200.0/21 | 2k | APNIC |  CN | 10th Dec 2014 |
| 103.44.221.0/24 | 256 | APNIC |  IN | 15th Dec 2014 |
| 103.44.222.0/24 | 256 | APNIC |  NZ | 16th Dec 2014 |
| 103.44.224.0/22 | 1k | APNIC | CN | 11th Dec 2014 |
| 103.44.228.0/22 | 1k | APNIC |  AU | 11th Dec 2014 |
| 103.44.4.0/22 | 1k | APNIC |  SG | 29th Nov 2014 |
| 103.45.0.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.100.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.104.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.108.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.112.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.116.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.12.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.120.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.124.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.16.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.164.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.192.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.196.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.20.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.200.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.204.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.208.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.212.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.216.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.220.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.224.0/22 | 1k | APNIC | CN | 15th Dec 2014 |
| 103.45.236.0/22 | 1k | APNIC |  VN | 15th Dec 2014 |
| 103.45.24.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.252.0/23 | 512 | APNIC |  PH | 16th Dec 2014 |
| 103.45.28.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.32.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.36.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.4.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.40.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.44.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.48.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.52.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.56.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.60.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.8.0/22 | 1k | APNIC | CN | 12th Dec 2014 |
| 103.45.80.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.84.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.88.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.92.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.45.96.0/22 | 1k | APNIC | CN | 14th Dec 2014 |
| 103.46.0.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 103.46.152.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 103.46.156.0/22 | 1k | APNIC | CN | 17th Dec 2014 |
| 103.46.160.0/22 | 1k | APNIC | CN | 17th Dec 2014 |