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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 45.113.240.0/22 | 1k | APNIC |  CN | 25th Mar 2015 |
| 45.113.252.0/22 | 1k | APNIC | CN | 26th Mar 2015 |
| 45.113.28.0/22 | 1k | APNIC | CN | 11th Mar 2015 |
| 45.113.52.0/22 | 1k | APNIC | CN | 12th Mar 2015 |
| 45.113.56.0/22 | 1k | APNIC | CN | 12th Mar 2015 |
| 45.113.68.0/22 | 1k | APNIC |  HK | 16th Mar 2015 |
| 45.113.72.0/22 | 1k | APNIC | CN | 16th Mar 2015 |
| 45.114.0.0/22 | 1k | APNIC | CN | 26th Mar 2015 |
| 45.114.136.0/22 | 1k | APNIC | CN | 3rd Apr 2015 |
| 45.114.196.0/22 | 1k | APNIC | CN | 8th Apr 2015 |
| 45.114.20.0/22 | 1k | APNIC |  PH | 26th Mar 2015 |
| 45.114.200.0/22 | 1k | APNIC | CN | 8th Apr 2015 |
| 45.114.228.0/22 | 1k | APNIC | CN | 9th Apr 2015 |
| 45.114.24.0/22 | 1k | APNIC | HK | 27th Mar 2015 |
| 45.114.252.0/22 | 1k | APNIC | CN | 13th Apr 2015 |
| 45.114.32.0/22 | 1k | APNIC | CN | 27th Mar 2015 |
| 45.114.40.0/22 | 1k | APNIC | CN | 30th Mar 2015 |
| 45.114.52.0/22 | 1k | APNIC | CN | 30th Mar 2015 |
| 45.114.72.0/22 | 1k | APNIC |  IN | 30th Mar 2015 |
| 45.114.96.0/22 | 1k | APNIC | CN | 31st Mar 2015 |
| 45.115.100.0/22 | 1k | APNIC | CN | 17th Apr 2015 |
| 45.115.118.0/24 | 256 | APNIC |  TH | 21st Apr 2015 |
| 45.115.120.0/22 | 1k | APNIC | CN | 20th Apr 2015 |
| 45.115.132.0/22 | 1k | APNIC | CN | 21st Apr 2015 |
| 45.115.148.0/22 | 1k | APNIC | IN | 22nd Apr 2015 |
| 45.115.156.0/22 | 1k | APNIC | CN | 23rd Apr 2015 |
| 45.115.160.0/22 | 1k | APNIC | HK | 22nd Apr 2015 |
| 45.115.18.0/23 | 512 | APNIC | CN | 7th Aug 2025 |
| 45.115.212.0/22 | 1k | APNIC | CN | 24th Apr 2015 |
| 45.115.244.0/22 | 1k | APNIC | CN | 27th Apr 2015 |
| 45.115.248.0/22 | 1k | APNIC | CN | 27th Apr 2015 |
| 45.115.49.0/24 | 256 | APNIC |  PK | 21st Apr 2015 |
| 45.115.8.0/22 | 1k | APNIC | IN | 13th Apr 2015 |
| 45.116.124.0/22 | 1k | APNIC | IN | 5th May 2015 |
| 45.116.16.0/22 | 1k | APNIC | CN | 28th Apr 2015 |
| 45.116.180.0/22 | 1k | APNIC | IN | 8th May 2015 |
| 45.116.184.0/22 | 1k | RIPE NCC |  NL | 8th May 2015 |
| 45.116.192.0/22 | 1k | APNIC | IN | 8th May 2015 |
| 45.116.196.0/22 | 1k | APNIC | IN | 8th May 2015 |
| 45.116.200.0/22 | 1k | APNIC | IN | 8th May 2015 |
| 45.116.24.0/22 | 1k | APNIC | CN | 28th Apr 2015 |
| 45.116.28.0/22 | 1k | APNIC | IN | 28th Apr 2015 |
| 45.116.36.0/22 | 1k | APNIC | CN | 29th Apr 2015 |
| 45.116.48.0/22 | 1k | APNIC |  AU | 25th Sept 2017 |
| 45.116.60.0/22 | 1k | APNIC | HK | 30th Apr 2015 |
| 45.116.64.0/22 | 1k | APNIC | HK | 30th Apr 2015 |
| 45.116.80.0/22 | 1k | APNIC | HK | 1st May 2015 |
| 45.116.84.0/22 | 1k | APNIC | IN | 1st May 2015 |
| 45.116.96.0/22 | 1k | APNIC | CN | 4th May 2015 |
| 45.117.116.0/22 | 1k | APNIC | IN | 19th May 2015 |