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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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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 |
|---|---|---|---|---|
| 103.255.127.0/24 | 256 | APNIC |  HK | 7th Jan 2014 |
| 103.255.136.0/22 | 1k | APNIC |  CN | 30th Dec 2013 |
| 103.255.14.0/24 | 256 | APNIC |  ID | 18th Dec 2013 |
| 103.255.166.0/23 | 512 | APNIC | ID | 27th Oct 2023 |
| 103.255.168.0/23 | 512 | APNIC |  IN | 2nd Jan 2014 |
| 103.255.184.0/22 | 1k | APNIC | CN | 3rd Jan 2014 |
| 103.255.188.0/22 | 1k | APNIC | IN | 3rd Jan 2014 |
| 103.255.206.0/23 | 512 | APNIC |  TW | 22nd Aug 2023 |
| 103.255.212.0/22 | 1k | APNIC | CN | 7th Jan 2014 |
| 103.255.228.0/22 | 1k | APNIC | CN | 7th Jan 2014 |
| 103.255.249.0/24 | 256 | APNIC |  AU | 8th Jan 2014 |
| 103.255.29.0/24 | 256 | APNIC | ID | 20th Dec 2013 |
| 103.255.32.0/22 | 1k | APNIC |  SG | 19th Dec 2013 |
| 103.255.42.0/23 | 512 | APNIC | TW | 18th Aug 2023 |
| 103.255.48.0/22 | 1k | APNIC | AU | 20th Dec 2013 |
| 103.255.78.0/23 | 512 | APNIC | AU | 27th Dec 2013 |
| 103.255.84.0/22 | 1k | APNIC |  VN | 26th Dec 2013 |
| 103.255.88.0/22 | 1k | APNIC | CN | 26th Dec 2013 |
| 103.255.98.0/23 | 512 | APNIC | ID | 21st Aug 2023 |
| 103.26.101.0/24 | 256 | APNIC | ID | 19th Jun 2013 |
| 103.26.104.0/22 | 1k | APNIC | IN | 19th Jun 2013 |
| 103.26.118.0/23 | 512 | APNIC | ID | 25th Oct 2022 |
| 103.26.132.0/22 | 1k | APNIC | CN | 3rd Nov 2015 |
| 103.26.156.0/22 | 1k | APNIC | CN | 20th Jun 2013 |
| 103.26.160.0/22 | 1k | APNIC | CN | 20th Jun 2013 |
| 103.26.168.0/24 | 256 | APNIC | IN | 21st Jun 2013 |
| 103.26.180.0/22 | 1k | APNIC |  TH | 21st Jun 2013 |
| 103.26.228.0/22 | 1k | APNIC | CN | 25th Jun 2013 |
| 103.26.234.0/23 | 512 | APNIC | IN | 25th Jun 2013 |
| 103.26.240.0/22 | 1k | APNIC | CN | 26th Jun 2013 |
| 103.26.60.0/22 | 1k | APNIC | AU | 18th Jun 2013 |
| 103.26.68.0/22 | 1k | APNIC | AU | 18th Jun 2013 |
| 103.27.0.0/24 | 256 | APNIC | HK | 26th Jun 2013 |
| 103.27.100.0/22 | 1k | APNIC | TH | 2nd Jul 2013 |
| 103.27.12.0/22 | 1k | APNIC | CN | 27th Jun 2013 |
| 103.27.136.0/22 | 1k | APNIC |  JP | 3rd Jul 2013 |
| 103.27.168.0/22 | 1k | APNIC | IN | 4th Jul 2013 |
| 103.27.188.0/22 | 1k | APNIC | AU | 8th Jul 2013 |
| 103.27.196.0/22 | 1k | APNIC | AU | 9th Jul 2013 |
| 103.27.212.0/22 | 1k | APNIC | CN | 11th Jul 2016 |
| 103.27.220.0/22 | 1k | APNIC | JP | 9th Jul 2013 |
| 103.27.228.0/22 | 1k | APNIC | SG | 9th Jul 2013 |
| 103.27.248.0/22 | 1k | APNIC | ID | 10th Jul 2013 |
| 103.27.3.0/24 | 256 | APNIC | ID | 27th Jun 2013 |
| 103.27.40.0/22 | 1k | APNIC | JP | 1st Jul 2013 |
| 103.27.44.0/22 | 1k | APNIC |  US | 1st Jul 2013 |
| 103.27.56.0/22 | 1k | APNIC | CN | 1st Jul 2013 |
| 103.27.88.0/22 | 1k | APNIC |  NZ | 2nd Jul 2013 |
| 103.27.92.0/22 | 1k | APNIC | AU | 2nd Jul 2013 |
| 103.27.96.0/22 | 1k | APNIC | CN | 2nd Jul 2013 |