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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
22,575 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.73.156.0/23 | 512 | APNIC |  IN | 30th Aug 2016 |
| 103.73.16.0/22 | 1k | APNIC |  CN | 23rd Aug 2016 |
| 103.73.168.0/22 | 1k | APNIC | CN | 30th Aug 2016 |
| 103.73.176.0/22 | 1k | APNIC | CN | 30th Aug 2016 |
| 103.73.20.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.73.208.0/22 | 1k | APNIC | CN | 31st Aug 2016 |
| 103.73.24.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.73.244.0/22 | 1k | APNIC | CN | 1st Sept 2016 |
| 103.73.248.0/22 | 1k | APNIC | CN | 1st Sept 2016 |
| 103.73.28.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.73.4.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.73.8.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.73.92.0/22 | 1k | APNIC | IN | 27th Aug 2016 |
| 103.74.12.0/23 | 512 | APNIC |  ID | 2nd Sept 2016 |
| 103.74.148.0/22 | 1k | APNIC | CN | 8th Sept 2016 |
| 103.74.152.0/22 | 1k | APNIC | CN | 8th Sept 2016 |
| 103.74.156.0/22 | 1k | APNIC | CN | 8th Sept 2016 |
| 103.74.165.0/24 | 256 | APNIC | ID | 8th Sept 2016 |
| 103.74.204.0/22 | 1k | APNIC | CN | 9th Sept 2016 |
| 103.74.212.0/23 | 512 | APNIC | ID | 9th Sept 2016 |
| 103.74.232.0/22 | 1k | APNIC | CN | 12th Sept 2016 |
| 103.74.32.0/22 | 1k | APNIC | CN | 5th Sept 2016 |
| 103.74.36.0/22 | 1k | APNIC | CN | 5th Sept 2016 |
| 103.74.40.0/22 | 1k | APNIC | CN | 5th Sept 2016 |
| 103.74.44.0/22 | 1k | APNIC | CN | 5th Sept 2016 |
| 103.74.52.0/23 | 512 | APNIC |  HK | 5th Sept 2016 |
| 103.74.56.0/22 | 1k | APNIC | CN | 5th Sept 2016 |
| 103.74.6.0/23 | 512 | APNIC | ID | 2nd Sept 2016 |
| 103.74.60.0/22 | 1k | APNIC | CN | 5th Sept 2016 |
| 103.75.108.0/22 | 1k | APNIC | CN | 19th Sept 2016 |
| 103.75.112.0/22 | 1k | APNIC | CN | 19th Sept 2016 |
| 103.75.120.0/22 | 1k | APNIC | CN | 19th Sept 2016 |
| 103.75.128.0/22 | 1k | APNIC | CN | 19th Sept 2016 |
| 103.75.136.0/23 | 512 | APNIC | ID | 24th Jan 2023 |
| 103.75.144.0/22 | 1k | APNIC | CN | 20th Sept 2016 |
| 103.75.168.0/22 | 1k | APNIC | ID | 20th Sept 2016 |
| 103.75.175.0/24 | 256 | APNIC |  SG | 22nd Sept 2016 |
| 103.75.176.0/22 | 1k | APNIC |  VN | 21st Sept 2016 |
| 103.75.204.0/22 | 1k | APNIC |  AU | 22nd Sept 2016 |
| 103.75.232.0/22 | 1k | APNIC | ID | 23rd Sept 2016 |
| 103.75.252.0/22 | 1k | APNIC |  JP | 26th Sept 2016 |
| 103.75.56.0/22 | 1k | APNIC | IN | 16th Sept 2016 |
| 103.75.74.0/23 | 512 | APNIC | VN | 8th Sept 2023 |
| 103.75.82.0/23 | 512 | APNIC | CN | 11th Sept 2023 |
| 103.75.88.0/22 | 1k | APNIC | CN | 19th Sept 2016 |
| 103.75.92.0/22 | 1k | APNIC | CN | 19th Sept 2016 |
| 103.76.104.0/23 | 512 | APNIC | ID | 11th Sept 2023 |
| 103.76.126.0/23 | 512 | APNIC | AU | 4th Oct 2016 |
| 103.76.132.0/22 | 1k | APNIC | ID | 3rd Oct 2016 |
| 103.76.216.0/22 | 1k | APNIC | CN | 8th Oct 2016 |