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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.58.12.0/22 | 1k | APNIC |  IN | 21st May 2015 |
| 103.58.128.0/21 | 2k | APNIC | IN | 26th May 2015 |
| 103.58.136.0/22 | 1k | APNIC | IN | 26th May 2015 |
| 103.58.140.0/22 | 1k | APNIC | IN | 26th May 2015 |
| 103.58.147.0/24 | 256 | APNIC |  ID | 27th May 2015 |
| 103.58.156.0/22 | 1k | APNIC | IN | 27th May 2015 |
| 103.58.168.0/21 | 2k | APNIC | IN | 27th May 2015 |
| 103.58.184.0/22 | 1k | APNIC | IN | 27th May 2015 |
| 103.58.188.0/22 | 1k | APNIC | IN | 27th May 2015 |
| 103.58.198.0/23 | 512 | APNIC | ID | 23rd Dec 2022 |
| 103.58.200.0/21 | 2k | APNIC | IN | 28th May 2015 |
| 103.58.208.0/22 | 1k | APNIC | IN | 28th May 2015 |
| 103.58.216.0/22 | 1k | APNIC |  AU | 29th May 2015 |
| 103.58.220.0/22 | 1k | APNIC | AU | 29th May 2015 |
| 103.58.236.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 103.58.24.0/22 | 1k | APNIC |  CN | 22nd May 2015 |
| 103.58.240.0/21 | 2k | APNIC | IN | 29th May 2015 |
| 103.58.252.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 103.58.28.0/22 | 1k | APNIC | IN | 22nd May 2015 |
| 103.58.36.0/22 | 1k | APNIC | IN | 22nd May 2015 |
| 103.58.44.0/22 | 1k | APNIC | IN | 22nd May 2015 |
| 103.58.48.0/22 | 1k | APNIC | IN | 22nd May 2015 |
| 103.58.52.0/22 | 1k | APNIC | IN | 22nd May 2015 |
| 103.58.56.0/21 | 2k | APNIC | IN | 23rd May 2015 |
| 103.58.76.0/22 | 1k | APNIC | IN | 25th May 2015 |
| 103.58.80.0/21 | 2k | APNIC | IN | 25th May 2015 |
| 103.58.88.0/22 | 1k | APNIC | IN | 25th May 2015 |
| 103.59.0.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 103.59.116.0/22 | 1k | APNIC | CN | 3rd Jun 2015 |
| 103.59.12.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 103.59.128.0/22 | 1k | APNIC | CN | 3rd Jun 2015 |
| 103.59.136.0/22 | 1k | APNIC |  JP | 4th Jun 2015 |
| 103.59.164.0/22 | 1k | APNIC | CN | 5th Jun 2015 |
| 103.59.224.0/21 | 2k | APNIC | IN | 9th Jun 2015 |
| 103.59.236.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 103.59.24.0/22 | 1k | APNIC | IN | 30th May 2015 |
| 103.59.240.0/21 | 2k | APNIC | IN | 9th Jun 2015 |
| 103.59.248.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 103.59.252.0/22 | 1k | APNIC | IN | 9th Jun 2015 |
| 103.59.28.0/22 | 1k | APNIC | IN | 30th May 2015 |
| 103.59.60.0/22 | 1k | APNIC | IN | 2nd Jun 2015 |
| 103.59.68.0/22 | 1k | APNIC | IN | 2nd Jun 2015 |
| 103.59.76.0/22 | 1k | APNIC | CN | 2nd Jun 2015 |
| 103.59.8.0/22 | 1k | APNIC | IN | 29th May 2015 |
| 103.59.80.0/21 | 2k | APNIC | IN | 2nd Jun 2015 |
| 103.59.96.0/22 | 1k | APNIC | IN | 3rd Jun 2015 |
| 103.6.0.0/23 | 512 | APNIC | ID | 14th Feb 2012 |
| 103.6.112.0/22 | 1k | APNIC | JP | 24th Feb 2012 |
| 103.6.118.0/24 | 256 | APNIC | ID | 28th Feb 2012 |
| 103.6.126.0/23 | 512 | APNIC |  TW | 23rd Aug 2023 |