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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 165.101.59.0/24 | 256 | APNIC |  IN | 25th Jun 2025 |
| 165.101.66.0/23 | 512 | APNIC |  CN | 25th Jun 2025 |
| 165.102.0.0/16 | 65.5k | APNIC |  JP | 11th May 1993 |
| 165.205.0.0/16 | 65.5k | APNIC |  NZ | 27th Aug 1993 |
| 165.240.0.0/16 | 65.5k | APNIC |  AU | 4th Oct 1993 |
| 165.31.0.0/16 | 65.5k | APNIC | AU | 9th Apr 1993 |
| 165.42.0.0/15 | 131k | APNIC | IN | 11th Feb 1993 |
| 165.84.32.0/20 | 4.1k | APNIC | NZ | 27th Apr 1993 |
| 165.96.0.0/16 | 65.5k | APNIC | JP | 10th May 1993 |
| 165.99.10.0/23 | 512 | APNIC | IN | 7th May 2025 |
| 165.99.103.0/24 | 256 | APNIC | IN | 21st May 2025 |
| 165.99.107.0/24 | 256 | APNIC |  ID | 22nd May 2025 |
| 165.99.110.0/23 | 512 | APNIC | IN | 22nd May 2025 |
| 165.99.12.0/23 | 512 | APNIC | IN | 7th May 2025 |
| 165.99.124.0/23 | 512 | APNIC |  US | 26th May 2025 |
| 165.99.126.0/23 | 512 | APNIC | ID | 26th May 2025 |
| 165.99.140.0/24 | 256 | APNIC | ID | 27th May 2025 |
| 165.99.170.0/23 | 512 | APNIC |  TW | 29th May 2025 |
| 165.99.180.0/24 | 256 | APNIC |  PH | 2nd Jun 2025 |
| 165.99.208.0/23 | 512 | APNIC |  BD | 5th Jun 2025 |
| 165.99.230.0/23 | 512 | APNIC | IN | 9th Jun 2025 |
| 165.99.232.0/23 | 512 | APNIC |  VN | 9th Jun 2025 |
| 165.99.242.0/23 | 512 | APNIC | IN | 11th Jun 2025 |
| 165.99.96.0/23 | 512 | APNIC | VN | 20th May 2025 |
| 166.103.0.0/16 | 65.5k | APNIC |  KR | 3rd Dec 1993 |
| 166.118.0.0/16 | 65.5k | APNIC | JP | 27th Dec 1993 |
| 166.79.0.0/16 | 65.5k | APNIC | KR | 5th Nov 1993 |
| 166.83.0.0/16 | 65.5k | APNIC | NZ | 10th Nov 1993 |
| 167.179.212.0/22 | 1k | APNIC | KR | 8th Sept 1993 |
| 167.189.0.0/16 | 65.5k | APNIC | CN | 16th Sept 1993 |
| 168.130.0.0/16 | 65.5k | APNIC | AU | 25th Apr 1994 |
| 168.140.192.0/22 | 1k | APNIC | AU | 10th May 1994 |
| 168.140.200.0/21 | 2k | APNIC | AU | 10th May 1994 |
| 168.140.208.0/20 | 4.1k | APNIC | AU | 10th May 1994 |
| 168.152.0.0/16 | 65.5k | APNIC | AU | 6th Apr 1994 |
| 168.198.0.0/16 | 65.5k | APNIC | AU | 17th Jun 1994 |
| 168.245.188.0/22 | 1k | APNIC |  SG | 20th Sept 1994 |
| 168.75.0.0/18 | 16.4k | APNIC | SG | 9th Feb 1994 |
| 169.140.0.0/16 | 65.5k | APNIC | KR | 8th Nov 1994 |
| 170.157.0.0/16 | 65.5k | APNIC | AU | 20th Jun 1994 |
| 170.179.0.0/16 | 65.5k | APNIC | CN | 7th Mar 1994 |
| 170.248.12.0/23 | 512 | APNIC | IN | 24th Jan 1994 |
| 170.248.138.0/23 | 512 | APNIC | IN | 24th Jan 1994 |
| 170.248.190.0/23 | 512 | APNIC | IN | 24th Jan 1994 |
| 170.248.46.0/23 | 512 | APNIC | IN | 24th Jan 1994 |
| 170.251.142.0/23 | 512 | APNIC | IN | 24th Jan 1994 |
| 170.251.150.0/23 | 512 | APNIC | IN | 24th Jan 1994 |
| 170.251.156.0/23 | 512 | APNIC | IN | 24th Jan 1994 |
| 174.138.144.0/20 | 4.1k | APNIC |  HK | 31st Dec 2009 |
| 175.100.224.0/19 | 8.2k | APNIC | JP | 4th Jan 2010 |