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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 45.122.80.0/22 | 1k | APNIC |  CN | 8th Jul 2015 |
| 45.122.84.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 45.122.88.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 45.122.92.0/22 | 1k | APNIC | CN | 8th Jul 2015 |
| 45.122.96.0/21 | 2k | APNIC | CN | 8th Jul 2015 |
| 45.123.112.0/22 | 1k | APNIC |  HK | 15th Jul 2015 |
| 45.123.120.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.132.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.136.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.148.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.152.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.156.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.164.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.184.0/22 | 1k | APNIC | CN | 15th Jul 2015 |
| 45.123.204.0/22 | 1k | APNIC | CN | 16th Jul 2015 |
| 45.123.208.0/22 | 1k | APNIC |  NZ | 13th Dec 2018 |
| 45.123.212.0/22 | 1k | APNIC | CN | 16th Jul 2015 |
| 45.123.224.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.228.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.232.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.236.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.240.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.244.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.248.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.252.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.123.28.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.32.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.36.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.44.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.48.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.52.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.56.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.60.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.64.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.68.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.72.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.76.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.80.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.84.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.123.88.0/22 | 1k | APNIC | CN | 13th Jul 2015 |
| 45.124.0.0/22 | 1k | APNIC | CN | 17th Jul 2015 |
| 45.124.100.0/22 | 1k | APNIC | CN | 22nd Jul 2015 |
| 45.124.104.0/22 | 1k | APNIC |  IN | 22nd Jul 2015 |
| 45.124.112.0/22 | 1k | APNIC | HK | 23rd Jul 2015 |
| 45.124.116.0/22 | 1k | APNIC | IN | 23rd Jul 2015 |
| 45.124.120.0/22 | 1k | APNIC | IN | 23rd Jul 2015 |
| 45.124.128.0/22 | 1k | APNIC | IN | 23rd Jul 2015 |
| 45.124.148.0/22 | 1k | APNIC | IN | 24th Jul 2015 |
| 45.124.152.0/22 | 1k | APNIC | IN | 24th Jul 2015 |
| 45.124.156.0/22 | 1k | APNIC | IN | 24th Jul 2015 |