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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
22,580 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 131.185.0.0/16 | 65.5k | APNIC |  AU | 3rd Jan 1989 |
| 134.18.0.0/16 | 65.5k | APNIC | AU | 13th Apr 1989 |
| 134.242.232.0/22 | 1k | APNIC |  US | 15th Aug 1989 |
| 134.242.236.0/23 | 512 | APNIC | US | 15th Aug 1989 |
| 134.242.238.0/24 | 256 | APNIC | US | 15th Aug 1989 |
| 134.242.240.0/20 | 4.1k | APNIC | US | 15th Aug 1989 |
| 134.42.225.0/24 | 256 | APNIC |  SG | 25th Apr 1989 |
| 134.42.226.0/24 | 256 | APNIC | AU | 25th Apr 1989 |
| 134.65.112.0/21 | 2k | APNIC | SG | 30th Jul 1990 |
| 134.65.124.0/23 | 512 | APNIC | SG | 30th Jul 1990 |
| 134.65.96.0/20 | 4.1k | APNIC | SG | 30th Jul 1990 |
| 136.143.224.0/20 | 4.1k | APNIC |  HK | 22nd Aug 1989 |
| 136.198.0.0/16 | 65.5k | APNIC |  JP | 25th Sept 1989 |
| 136.22.32.0/19 | 8.2k | APNIC |  IN | 22nd Aug 1989 |
| 137.59.132.0/22 | 1k | APNIC | IN | 3rd Feb 2016 |
| 137.59.136.0/22 | 1k | APNIC | IN | 3rd Feb 2016 |
| 137.59.140.0/22 | 1k | APNIC | IN | 3rd Feb 2016 |
| 137.59.156.0/22 | 1k | APNIC | IN | 4th Feb 2016 |
| 137.59.164.0/22 | 1k | APNIC | IN | 5th Feb 2016 |
| 137.59.168.0/22 | 1k | APNIC | AU | 5th Feb 2016 |
| 137.59.176.0/22 | 1k | APNIC | IN | 5th Feb 2016 |
| 137.59.244.0/22 | 1k | APNIC | IN | 10th Feb 2016 |
| 137.59.28.0/22 | 1k | APNIC |  VN | 26th Oct 2015 |
| 137.59.36.0/22 | 1k | APNIC | VN | 26th Oct 2015 |
| 137.59.59.0/24 | 256 | APNIC |  CN | 9th Jun 2016 |
| 137.59.88.0/22 | 1k | APNIC | CN | 27th Oct 2015 |
| 138.211.0.0/16 | 65.5k | APNIC |  NZ | 30th May 1990 |
| 138.243.0.0/16 | 65.5k | APNIC | JP | 11th Jun 1990 |
| 138.252.102.0/23 | 512 | APNIC |  BD | 27th Oct 2025 |
| 138.252.116.0/23 | 512 | APNIC |  TW | 30th Oct 2025 |
| 138.252.118.0/23 | 512 | APNIC | CN | 30th Oct 2025 |
| 138.252.122.0/23 | 512 | APNIC |  ID | 31st Oct 2025 |
| 138.252.132.0/23 | 512 | APNIC | VN | 3rd Nov 2025 |
| 138.252.142.0/23 | 512 | APNIC | VN | 5th Nov 2025 |
| 138.252.162.0/23 | 512 | APNIC | CN | 6th Nov 2025 |
| 138.252.167.0/24 | 256 | APNIC |  PH | 10th Nov 2025 |
| 138.252.182.0/24 | 256 | APNIC |  TL | 11th Nov 2025 |
| 138.252.196.0/23 | 512 | APNIC | HK | 13th Nov 2025 |
| 138.252.210.0/24 | 256 | APNIC | ID | 14th Nov 2025 |
| 138.252.211.0/24 | 256 | APNIC | HK | 14th Nov 2025 |
| 138.252.216.0/24 | 256 | APNIC | AU | 17th Nov 2025 |
| 138.252.217.0/24 | 256 | APNIC | ID | 17th Nov 2025 |
| 138.252.218.0/23 | 512 | APNIC | VN | 17th Nov 2025 |
| 138.252.230.0/23 | 512 | APNIC | IN | 18th Nov 2025 |
| 138.252.250.0/23 | 512 | APNIC | AU | 19th Nov 2025 |
| 138.252.36.0/23 | 512 | APNIC | IN | 11th Oct 2025 |
| 138.252.42.0/24 | 256 | APNIC | IN | 14th Oct 2025 |
| 138.252.50.0/24 | 256 | APNIC | ID | 16th Oct 2025 |
| 138.252.60.0/23 | 512 | APNIC | HK | 17th Oct 2025 |
| 138.252.70.0/24 | 256 | APNIC | ID | 20th Oct 2025 |