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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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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 |
|---|---|---|---|---|
| 153.79.80.0/20 | 4.1k | APNIC |  JP | 23rd Sept 1991 |
| 154.34.0.0/18 | 16.4k | APNIC | JP | 13th May 1996 |
| 154.8.112.0/21 | 2k | APNIC |  HK | 5th Feb 1992 |
| 154.8.120.0/22 | 1k | APNIC |  AU | 5th Feb 1992 |
| 154.8.126.0/23 | 512 | APNIC | HK | 5th Feb 1992 |
| 154.8.64.0/19 | 8.2k | APNIC | HK | 5th Feb 1992 |
| 154.8.96.0/20 | 4.1k | APNIC |  ID | 5th Feb 1992 |
| 155.137.128.0/17 | 32.8k | APNIC | HK | 12th Nov 1991 |
| 155.160.0.0/16 | 65.5k | APNIC | JP | 14th Sept 1993 |
| 155.32.192.0/18 | 16.4k | APNIC |  NZ | 30th Oct 1991 |
| 155.35.226.0/24 | 256 | APNIC | AU | 4th Feb 1992 |
| 155.71.0.0/16 | 65.5k | APNIC | AU | 30th Oct 1991 |
| 156.22.128.0/18 | 16.4k | APNIC | AU | 1st Nov 1991 |
| 156.22.192.0/19 | 8.2k | APNIC | AU | 1st Nov 1991 |
| 156.22.224.0/20 | 4.1k | APNIC | AU | 1st Nov 1991 |
| 156.31.0.0/16 | 65.5k | APNIC |  BN | 3rd Dec 1991 |
| 157.10.118.0/23 | 512 | APNIC |  CN | 10th Jan 2024 |
| 157.10.126.0/23 | 512 | APNIC |  BT | 10th Jan 2024 |
| 157.10.130.0/23 | 512 | APNIC | CN | 10th Jan 2024 |
| 157.10.16.0/23 | 512 | APNIC | ID | 30th Dec 2023 |
| 157.10.165.0/24 | 256 | APNIC | NZ | 12th Jan 2024 |
| 157.10.181.0/24 | 256 | APNIC | ID | 12th Jan 2024 |
| 157.10.204.0/24 | 256 | APNIC |  IN | 15th Jan 2024 |
| 157.10.205.0/24 | 256 | APNIC | ID | 16th Jan 2024 |
| 157.10.218.0/23 | 512 | APNIC | CN | 18th Jan 2024 |
| 157.10.220.0/23 | 512 | APNIC | CN | 18th Jan 2024 |
| 157.10.237.0/24 | 256 | APNIC | ID | 19th Jan 2024 |
| 157.10.246.0/23 | 512 | APNIC | CN | 19th Jan 2024 |
| 157.10.36.0/23 | 512 | APNIC | CN | 2nd Jan 2024 |
| 157.10.40.0/24 | 256 | APNIC | IN | 2nd Jan 2024 |
| 157.10.60.0/23 | 512 | APNIC | IN | 3rd Jan 2024 |
| 157.10.86.0/23 | 512 | APNIC |  VN | 8th Jan 2024 |
| 157.101.0.0/18 | 16.4k | APNIC | JP | 8th Feb 1992 |
| 157.104.0.0/16 | 65.5k | APNIC | JP | 8th Feb 1992 |
| 157.106.0.0/16 | 65.5k | APNIC | JP | 8th Feb 1992 |
| 157.108.0.0/16 | 65.5k | APNIC | JP | 8th Feb 1992 |
| 157.11.0.0/16 | 65.5k | APNIC | JP | 13th Apr 1993 |
| 157.112.128.0/20 | 4.1k | APNIC | JP | 8th Feb 1992 |
| 157.112.96.0/23 | 512 | APNIC | JP | 8th Feb 1992 |
| 157.112.98.0/24 | 256 | APNIC | JP | 8th Feb 1992 |
| 157.115.0.0/16 | 65.5k | APNIC | JP | 8th Feb 1992 |
| 157.116.0.0/16 | 65.5k | APNIC | JP | 8th Feb 1992 |
| 157.117.0.0/16 | 65.5k | APNIC | JP | 8th Feb 1992 |
| 157.119.12.0/22 | 1k | APNIC | CN | 21st Apr 2016 |
| 157.119.132.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 157.119.136.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 157.119.140.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 157.119.144.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 157.119.148.0/22 | 1k | APNIC | CN | 27th Apr 2016 |
| 157.119.152.0/22 | 1k | APNIC | CN | 27th Apr 2016 |