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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 144.79.88.0/24 | 256 | APNIC |  ID | 8th Dec 2025 |
| 144.89.128.0/17 | 32.8k | APNIC |  SG | 20th Nov 1990 |
| 144.97.0.0/16 | 65.5k | APNIC |  AU | 28th Nov 1990 |
| 146.117.0.0/16 | 65.5k | APNIC |  JP | 11th Feb 2011 |
| 146.196.100.0/22 | 1k | APNIC |  US | 22nd Mar 2016 |
| 146.196.124.0/22 | 1k | APNIC |  CN | 22nd Mar 2016 |
| 146.196.72.0/22 | 1k | APNIC | CN | 21st Mar 2016 |
| 146.196.92.0/22 | 1k | APNIC | CN | 22nd Mar 2016 |
| 146.221.0.0/16 | 65.5k | APNIC | AU | 28th Feb 1991 |
| 146.51.0.0/16 | 65.5k | APNIC | JP | 18th Jan 1991 |
| 146.88.144.0/23 | 512 | APNIC | AU | 28th Jan 1991 |
| 146.88.146.0/23 | 512 | APNIC |  NZ | 28th Jan 1991 |
| 146.88.19.0/24 | 256 | APNIC |  NL | 28th Jan 1991 |
| 147.160.64.0/18 | 16.4k | APNIC |  IN | 29th Apr 1991 |
| 147.212.0.0/16 | 65.5k | APNIC | AU | 14th Feb 2011 |
| 147.78.152.0/22 | 1k | APNIC |  TH | 21st Jan 2019 |
| 148.145.0.0/17 | 32.8k | APNIC | AU | 18th Apr 1991 |
| 148.161.0.0/16 | 65.5k | APNIC | JP | 2nd May 1991 |
| 148.59.57.0/24 | 256 | APNIC | JP | 9th Apr 1991 |
| 149.41.0.0/16 | 65.5k | APNIC | CN | 16th Mar 1993 |
| 150.0.0.0/16 | 65.5k | APNIC | CN | 29th Mar 2011 |
| 150.1.0.0/16 | 65.5k | APNIC | JP | 31st Mar 1997 |
| 150.10.0.0/16 | 65.5k | APNIC | JP | 31st Mar 1997 |
| 150.107.12.0/22 | 1k | APNIC | TH | 18th Jun 2014 |
| 150.107.128.0/22 | 1k | APNIC | SG | 20th Jun 2014 |
| 150.107.138.0/23 | 512 | APNIC | ID | 20th Jun 2014 |
| 150.107.148.0/22 | 1k | APNIC | ID | 20th Jun 2014 |
| 150.107.88.0/22 | 1k | APNIC | IN | 19th Jun 2014 |
| 150.115.0.0/16 | 65.5k | APNIC | CN | 29th Mar 2011 |
| 150.121.0.0/16 | 65.5k | APNIC | CN | 29th Mar 2011 |
| 150.122.0.0/16 | 65.5k | APNIC | CN | 29th Mar 2011 |
| 150.129.12.0/22 | 1k | APNIC | AU | 25th Jun 2014 |
| 150.129.140.0/22 | 1k | APNIC | IN | 27th Jun 2014 |
| 150.129.196.0/22 | 1k | APNIC | IN | 30th Jun 2014 |
| 150.129.212.0/22 | 1k | APNIC | IN | 1st Jul 2014 |
| 150.129.224.0/22 | 1k | APNIC |  KR | 1st Jul 2014 |
| 150.129.96.0/22 | 1k | APNIC |  TW | 26th Jun 2014 |
| 150.13.0.0/16 | 65.5k | APNIC | JP | 31st Mar 1997 |
| 150.151.0.0/16 | 65.5k | APNIC | AU | 20th May 1991 |
| 150.16.0.0/15 | 131k | APNIC | JP | 31st Mar 1997 |
| 150.2.0.0/16 | 65.5k | APNIC | JP | 31st Mar 1997 |
| 150.20.0.0/16 | 65.5k | APNIC | JP | 4th Mar 1993 |
| 150.21.0.0/16 | 65.5k | APNIC | JP | 11th Jul 1994 |
| 150.22.128.0/17 | 32.8k | APNIC | JP | 3rd Nov 1992 |
| 150.22.16.0/20 | 4.1k | APNIC | JP | 3rd Nov 1992 |
| 150.22.32.0/19 | 8.2k | APNIC | JP | 3rd Nov 1992 |
| 150.22.4.0/22 | 1k | APNIC | JP | 3rd Nov 1992 |
| 150.22.64.0/20 | 4.1k | APNIC | JP | 3rd Nov 1992 |
| 150.22.8.0/21 | 2k | APNIC | JP | 3rd Nov 1992 |
| 150.22.80.0/22 | 1k | APNIC | JP | 3rd Nov 1992 |