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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
22,580 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 144.16.113.0/24 | 256 | APNIC |  IN | 6th Nov 1990 |
| 144.16.114.0/23 | 512 | APNIC | IN | 6th Nov 1990 |
| 144.16.116.0/22 | 1k | APNIC | IN | 6th Nov 1990 |
| 144.16.120.0/21 | 2k | APNIC | IN | 6th Nov 1990 |
| 144.16.64.0/19 | 8.2k | APNIC | IN | 6th Nov 1990 |
| 144.16.96.0/20 | 4.1k | APNIC | IN | 6th Nov 1990 |
| 144.249.224.0/20 | 4.1k | APNIC |  NZ | 11th Jan 1991 |
| 144.36.104.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.128.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.36.144.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.36.148.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.36.176.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.178.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.236.0/24 | 256 | APNIC | IN | 9th Nov 1990 |
| 144.36.72.0/23 | 512 | APNIC | IN | 9th Nov 1990 |
| 144.48.100.0/22 | 1k | APNIC |  KR | 11th Apr 2016 |
| 144.48.140.0/22 | 1k | APNIC |  IE | 14th Apr 2016 |
| 144.48.156.0/22 | 1k | APNIC |  CN | 14th Apr 2016 |
| 144.48.172.0/22 | 1k | APNIC |  AU | 27th Jun 2019 |
| 144.48.180.0/22 | 1k | APNIC | CN | 18th Apr 2016 |
| 144.48.184.0/22 | 1k | APNIC | CN | 18th Apr 2016 |
| 144.48.200.0/22 | 1k | APNIC |  PH | 19th Apr 2016 |
| 144.48.204.0/22 | 1k | APNIC | CN | 19th Apr 2016 |
| 144.48.208.0/22 | 1k | APNIC | CN | 19th Apr 2016 |
| 144.48.244.0/22 | 1k | APNIC | AU | 21st Apr 2016 |
| 144.48.40.0/22 | 1k | APNIC | KR | 7th Apr 2016 |
| 144.48.44.0/22 | 1k | APNIC | KR | 7th Apr 2016 |
| 144.48.88.0/22 | 1k | APNIC | CN | 11th Apr 2016 |
| 144.79.10.0/23 | 512 | APNIC | CN | 21st Nov 2025 |
| 144.79.112.0/23 | 512 | APNIC |  SG | 11th Dec 2025 |
| 144.79.126.0/23 | 512 | APNIC | IN | 15th Dec 2025 |
| 144.79.14.0/23 | 512 | APNIC |  VN | 24th Nov 2025 |
| 144.79.148.0/23 | 512 | APNIC | CN | 17th Dec 2025 |
| 144.79.150.0/23 | 512 | APNIC |  PK | 17th Dec 2025 |
| 144.79.2.0/23 | 512 | APNIC |  BD | 21st Nov 2025 |
| 144.79.206.0/23 | 512 | APNIC | IN | 24th Dec 2025 |
| 144.79.208.0/23 | 512 | APNIC | IN | 24th Dec 2025 |
| 144.79.222.0/23 | 512 | APNIC | SG | 29th Dec 2025 |
| 144.79.242.0/23 | 512 | APNIC |  ID | 30th Dec 2025 |
| 144.79.251.0/24 | 256 | APNIC | ID | 31st Dec 2025 |
| 144.79.26.0/23 | 512 | APNIC | AU | 25th Nov 2025 |
| 144.79.28.0/23 | 512 | APNIC | CN | 25th Nov 2025 |
| 144.79.4.0/23 | 512 | APNIC | CN | 21st Nov 2025 |
| 144.79.41.0/24 | 256 | APNIC | BD | 28th Nov 2025 |
| 144.79.42.0/23 | 512 | APNIC | CN | 1st Dec 2025 |
| 144.79.46.0/23 | 512 | APNIC | PK | 1st Dec 2025 |
| 144.79.48.0/23 | 512 | APNIC |  US | 1st Dec 2025 |
| 144.79.50.0/24 | 256 | APNIC | ID | 2nd Dec 2025 |
| 144.79.73.0/24 | 256 | APNIC | ID | 5th Dec 2025 |
| 144.79.84.0/23 | 512 | APNIC | CN | 8th Dec 2025 |