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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 45.119.248.0/22 | 1k | APNIC |  IN | 10th Jun 2015 |
| 45.119.32.0/21 | 2k | APNIC | IN | 2nd Jun 2015 |
| 45.119.48.0/22 | 1k | APNIC | IN | 3rd Jun 2015 |
| 45.119.64.0/22 | 1k | APNIC |  CN | 3rd Jun 2015 |
| 45.119.72.0/22 | 1k | APNIC | CN | 3rd Jun 2015 |
| 45.119.76.0/22 | 1k | APNIC |  VN | 4th Jun 2015 |
| 45.12.108.0/22 | 1k | RIPE NCC |  CY | 1st May 2019 |
| 45.12.120.0/22 | 1k | RIPE NCC |  CH | 1st May 2019 |
| 45.12.128.0/22 | 1k | RIPE NCC | CY | 1st May 2019 |
| 45.12.136.0/22 | 1k | RIPE NCC | CY | 1st May 2019 |
| 45.12.152.0/22 | 1k | RIPE NCC |  ES | 1st May 2019 |
| 45.12.160.0/22 | 1k | RIPE NCC |  AT | 1st May 2019 |
| 45.12.188.0/22 | 1k | RIPE NCC |  GB | 2nd May 2019 |
| 45.12.20.0/22 | 1k | RIPE NCC | GB | 30th Apr 2019 |
| 45.12.232.0/22 | 1k | RIPE NCC | AT | 2nd May 2019 |
| 45.12.46.0/23 | 512 | RIPE NCC | AT | 30th Apr 2019 |
| 45.12.92.0/22 | 1k | RIPE NCC |  DE | 1st May 2019 |
| 45.120.12.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 45.120.140.0/22 | 1k | APNIC | CN | 16th Jun 2015 |
| 45.120.20.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 45.120.212.0/22 | 1k | APNIC | IN | 22nd Jun 2015 |
| 45.120.220.0/22 | 1k | RIPE NCC | ES | 23rd Jun 2015 |
| 45.120.232.0/21 | 2k | APNIC | IN | 23rd Jun 2015 |
| 45.120.24.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 45.120.252.0/22 | 1k | APNIC | IN | 24th Jun 2015 |
| 45.120.32.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 45.120.60.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 45.120.72.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 45.120.8.0/22 | 1k | APNIC | IN | 11th Jun 2015 |
| 45.120.88.0/22 | 1k | APNIC | IN | 12th Jun 2015 |
| 45.120.92.0/22 | 1k | APNIC | IN | 12th Jun 2015 |
| 45.121.100.0/22 | 1k | APNIC | IN | 29th Jun 2015 |
| 45.121.112.0/22 | 1k | APNIC | IN | 30th Jun 2015 |
| 45.121.116.0/22 | 1k | APNIC | IN | 30th Jun 2015 |
| 45.121.120.0/21 | 2k | APNIC | IN | 30th Jun 2015 |
| 45.121.128.0/22 | 1k | APNIC | IN | 30th Jun 2015 |
| 45.121.152.0/22 | 1k | APNIC | VN | 2nd Jul 2015 |
| 45.121.156.0/22 | 1k | APNIC | IN | 2nd Jul 2015 |
| 45.121.16.0/22 | 1k | APNIC | IN | 24th Jun 2015 |
| 45.121.168.0/22 | 1k | APNIC | IN | 2nd Jul 2015 |
| 45.121.172.0/22 | 1k | APNIC | CN | 2nd Jul 2015 |
| 45.121.176.0/22 | 1k | APNIC | CN | 3rd Jul 2015 |
| 45.121.204.0/22 | 1k | APNIC |  HK | 6th Jul 2015 |
| 45.121.220.0/22 | 1k | APNIC | IN | 6th Jul 2015 |
| 45.121.224.0/22 | 1k | APNIC | IN | 6th Jul 2015 |
| 45.121.228.0/22 | 1k | APNIC | IN | 6th Jul 2015 |
| 45.121.232.0/22 | 1k | APNIC | IN | 6th Jul 2015 |
| 45.121.240.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 45.121.244.0/22 | 1k | APNIC | CN | 6th Jul 2015 |
| 45.121.248.0/22 | 1k | APNIC | CN | 6th Jul 2015 |