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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,593 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.245.170.0/23 | 512 | APNIC |  IN | 1st Aug 2023 |
| 103.245.177.0/24 | 256 | APNIC |  ID | 22nd Jan 2013 |
| 103.245.208.0/22 | 1k | APNIC |  MY | 23rd Jan 2013 |
| 103.245.223.0/24 | 256 | APNIC |  SG | 24th Jan 2013 |
| 103.245.224.0/24 | 256 | APNIC |  JP | 24th Jan 2013 |
| 103.245.23.0/24 | 256 | APNIC |  CN | 7th Jan 2013 |
| 103.245.238.0/23 | 512 | APNIC |  VN | 1st Aug 2023 |
| 103.245.52.0/22 | 1k | APNIC | CN | 7th Jan 2013 |
| 103.245.57.0/24 | 256 | APNIC | ID | 31st Jul 2023 |
| 103.245.60.0/22 | 1k | APNIC | CN | 8th Jan 2013 |
| 103.245.80.0/22 | 1k | APNIC | CN | 22nd Jan 2013 |
| 103.246.12.0/22 | 1k | APNIC | CN | 29th Jun 2011 |
| 103.246.120.0/22 | 1k | APNIC | CN | 17th May 2011 |
| 103.246.124.0/22 | 1k | APNIC | CN | 17th May 2011 |
| 103.246.129.0/24 | 256 | APNIC | ID | 23rd Aug 2011 |
| 103.246.132.0/22 | 1k | APNIC | CN | 23rd Aug 2011 |
| 103.246.136.0/22 | 1k | APNIC |  AU | 23rd Aug 2011 |
| 103.246.140.0/22 | 1k | APNIC | SG | 23rd Aug 2011 |
| 103.246.187.0/24 | 256 | APNIC | IN | 10th Dec 2015 |
| 103.246.196.0/22 | 1k | APNIC | IN | 26th Aug 2011 |
| 103.246.212.0/22 | 1k | APNIC | IN | 29th Aug 2011 |
| 103.246.232.0/24 | 256 | APNIC | JP | 31st Aug 2011 |
| 103.246.235.0/24 | 256 | APNIC | AU | 5th Sept 2011 |
| 103.246.236.0/22 | 1k | APNIC |  KR | 31st Aug 2011 |
| 103.246.32.0/22 | 1k | APNIC | AU | 5th Jul 2011 |
| 103.246.66.0/23 | 512 | APNIC | JP | 2nd Aug 2023 |
| 103.246.72.0/23 | 512 | APNIC | JP | 2nd Aug 2023 |
| 103.246.76.0/24 | 256 | APNIC | ID | 1st Jun 2011 |
| 103.246.8.0/22 | 1k | APNIC | CN | 29th Jun 2011 |
| 103.247.100.0/22 | 1k | APNIC | ID | 25th Jan 2012 |
| 103.247.126.0/23 | 512 | APNIC | ID | 31st Jan 2012 |
| 103.247.132.0/22 | 1k | APNIC | SG | 31st Jan 2012 |
| 103.247.144.0/22 | 1k | APNIC |  HK | 1st Feb 2012 |
| 103.247.16.0/23 | 512 | APNIC | ID | 13th Jan 2012 |
| 103.247.172.0/22 | 1k | APNIC | CN | 1st Feb 2012 |
| 103.247.18.0/24 | 256 | APNIC | ID | 17th Jan 2012 |
| 103.247.180.0/24 | 256 | APNIC | SG | 25th Nov 2015 |
| 103.247.198.0/24 | 256 | APNIC |  AF | 6th Feb 2012 |
| 103.247.200.0/22 | 1k | APNIC | CN | 6th Feb 2012 |
| 103.247.212.0/22 | 1k | APNIC | CN | 7th Feb 2012 |
| 103.247.220.0/22 | 1k | APNIC | KR | 9th Feb 2012 |
| 103.247.34.0/23 | 512 | APNIC | ID | 17th Jan 2012 |
| 103.247.40.0/22 | 1k | APNIC | ID | 18th Jan 2012 |
| 103.247.96.0/22 | 1k | APNIC | IN | 25th Jan 2012 |
| 103.248.0.0/23 | 512 | APNIC | CN | 10th May 2013 |
| 103.248.100.0/22 | 1k | APNIC | CN | 17th May 2013 |
| 103.248.124.0/22 | 1k | APNIC | CN | 20th May 2013 |
| 103.248.168.0/22 | 1k | APNIC | CN | 21st May 2013 |
| 103.248.180.0/22 | 1k | APNIC | HK | 6th Nov 2015 |
| 103.248.192.0/22 | 1k | APNIC | CN | 23rd May 2013 |