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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 45.117.124.0/22 | 1k | APNIC |  CN | 20th May 2015 |
| 45.117.128.0/22 | 1k | APNIC |  IN | 20th May 2015 |
| 45.117.16.0/22 | 1k | APNIC |  JP | 14th May 2015 |
| 45.117.184.0/22 | 1k | APNIC | IN | 20th May 2015 |
| 45.117.20.0/22 | 1k | APNIC | CN | 14th May 2015 |
| 45.117.216.0/22 | 1k | APNIC | IN | 21st May 2015 |
| 45.117.224.0/22 | 1k | APNIC | IN | 21st May 2015 |
| 45.117.24.0/22 | 1k | APNIC |  AU | 14th May 2015 |
| 45.117.252.0/22 | 1k | APNIC | CN | 22nd May 2015 |
| 45.117.48.0/22 | 1k | APNIC | IN | 15th May 2015 |
| 45.117.56.0/23 | 512 | APNIC |  HK | 22nd Aug 2025 |
| 45.117.88.0/22 | 1k | APNIC |  PK | 18th May 2015 |
| 45.117.92.0/22 | 1k | APNIC | IN | 18th May 2015 |
| 45.118.0.0/21 | 2k | APNIC | IN | 22nd May 2015 |
| 45.118.108.0/22 | 1k | APNIC | IN | 27th May 2015 |
| 45.118.116.0/22 | 1k | APNIC | IN | 27th May 2015 |
| 45.118.12.0/22 | 1k | APNIC | IN | 22nd May 2015 |
| 45.118.120.0/22 | 1k | APNIC | IN | 27th May 2015 |
| 45.118.128.0/22 | 1k | APNIC | IN | 27th May 2015 |
| 45.118.152.0/22 | 1k | APNIC | IN | 28th May 2015 |
| 45.118.168.0/21 | 2k | APNIC | IN | 28th May 2015 |
| 45.118.176.0/22 | 1k | APNIC | IN | 28th May 2015 |
| 45.118.192.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 45.118.196.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 45.118.200.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 45.118.212.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 45.118.220.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 45.118.224.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 45.118.228.0/22 | 1k | APNIC | IN | 30th May 2015 |
| 45.118.232.0/21 | 2k | APNIC | IN | 30th May 2015 |
| 45.118.240.0/22 | 1k | APNIC | IN | 30th May 2015 |
| 45.118.44.0/22 | 1k | APNIC | IN | 25th May 2015 |
| 45.118.56.0/22 | 1k | APNIC | IN | 25th May 2015 |
| 45.118.80.0/21 | 2k | APNIC | IN | 26th May 2015 |
| 45.118.88.0/22 | 1k | APNIC | IN | 26th May 2015 |
| 45.118.92.0/22 | 1k | APNIC | IN | 26th May 2015 |
| 45.118.96.0/21 | 2k | APNIC | IN | 26th May 2015 |
| 45.119.100.0/22 | 1k | APNIC |  NZ | 4th Jun 2015 |
| 45.119.108.0/22 | 1k | APNIC |  VN | 4th Jun 2015 |
| 45.119.16.0/21 | 2k | APNIC | IN | 2nd Jun 2015 |
| 45.119.168.0/21 | 2k | APNIC | IN | 9th Jun 2015 |
| 45.119.176.0/21 | 2k | APNIC | IN | 9th Jun 2015 |
| 45.119.184.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 45.119.188.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 45.119.192.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 45.119.196.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 45.119.224.0/21 | 2k | APNIC | IN | 10th Jun 2015 |
| 45.119.232.0/22 | 1k | APNIC | CN | 10th Jun 2015 |
| 45.119.24.0/22 | 1k | APNIC | IN | 2nd Jun 2015 |
| 45.119.244.0/22 | 1k | APNIC | IN | 10th Jun 2015 |