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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.135.102.0/24 | 256 | APNIC |  IN | 29th Jul 2025 |
| 192.135.103.0/24 | 256 | APNIC |  JP | 5th May 1992 |
| 192.135.104.0/24 | 256 | APNIC | JP | 5th May 1992 |
| 192.135.105.0/24 | 256 | APNIC | JP | 5th May 1992 |
| 192.135.106.0/23 | 512 | APNIC | JP | 5th May 1992 |
| 192.135.108.0/24 | 256 | APNIC | JP | 5th May 1992 |
| 192.135.90.0/23 | 512 | APNIC |  PK | 26th Sept 2017 |
| 192.135.94.0/24 | 256 | APNIC | JP | 28th Apr 1993 |
| 192.135.96.0/24 | 256 | APNIC | JP | 5th May 1992 |
| 192.135.97.0/24 | 256 | APNIC |  ID | 29th Jul 2025 |
| 192.135.99.0/24 | 256 | APNIC |  HK | 4th Mar 2019 |
| 192.138.118.0/23 | 512 | APNIC |  US | 21st Jan 2011 |
| 192.138.120.0/22 | 1k | APNIC | US | 11th Feb 2011 |
| 192.138.124.0/23 | 512 | APNIC | US | 11th Feb 2011 |
| 192.138.188.0/24 | 256 | APNIC |  SG | 7th Jan 2011 |
| 192.140.128.0/22 | 1k | APNIC |  CN | 2nd Apr 2016 |
| 192.140.132.0/22 | 1k | APNIC | CN | 2nd Apr 2016 |
| 192.140.136.0/22 | 1k | APNIC | CN | 2nd Apr 2016 |
| 192.140.156.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 192.140.192.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 192.140.196.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 192.140.200.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 192.140.204.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 192.140.232.0/22 | 1k | APNIC |  AU | 5th Apr 2016 |
| 192.145.20.0/22 | 1k | APNIC |  TH | 7th Dec 2018 |
| 192.146.133.0/24 | 256 | APNIC | SG | 28th Jan 1992 |
| 192.146.184.0/24 | 256 | APNIC | JP | 3rd Feb 1992 |
| 192.146.189.0/24 | 256 | APNIC | IN | 17th Aug 2026 |
| 192.146.232.0/24 | 256 | APNIC | AU | 24th Jan 2011 |
| 192.146.252.0/24 | 256 | APNIC | AU | 8th Feb 1992 |
| 192.146.253.0/24 | 256 | APNIC | AU | 8th Feb 1992 |
| 192.147.235.0/24 | 256 | APNIC | AU | 20th Feb 1992 |
| 192.147.246.0/24 | 256 | APNIC | AU | 25th Feb 1992 |
| 192.148.230.0/24 | 256 | APNIC | AU | 4th Mar 1992 |
| 192.149.36.0/24 | 256 | APNIC | AU | 26th Feb 1992 |
| 192.150.130.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.131.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.132.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.133.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.134.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.135.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.136.0/24 | 256 | APNIC | AU | 7th Feb 2011 |
| 192.150.16.0/24 | 256 | APNIC | IN | 25th Jun 1992 |
| 192.150.202.0/24 | 256 | APNIC | AU | 18th Mar 1992 |
| 192.150.218.0/23 | 512 | APNIC |  NZ | 20th Mar 1992 |
| 192.150.234.0/23 | 512 | APNIC | AU | 20th Mar 1992 |
| 192.150.236.0/23 | 512 | APNIC | AU | 20th Mar 1992 |
| 192.152.144.0/24 | 256 | APNIC | HK | 18th Aug 2026 |
| 192.152.69.0/24 | 256 | APNIC | JP | 8th Apr 1992 |
| 192.153.113.0/24 | 256 | APNIC | JP | 29th Jun 1993 |