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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
22,595 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.52.150.0/24 | 256 | APNIC |  JP | 24th Jan 2011 |
| 192.52.171.0/24 | 256 | APNIC |  AU | 26th Apr 1989 |
| 192.52.172.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.173.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.174.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.175.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.176.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.185.0/24 | 256 | APNIC |  TL | 7th Jan 2026 |
| 192.52.196.0/23 | 512 | APNIC | AU | 24th Feb 2011 |
| 192.54.130.0/24 | 256 | APNIC |  NZ | 8th Jun 1989 |
| 192.54.137.0/24 | 256 | APNIC | AU | 7th Feb 2011 |
| 192.55.118.0/24 | 256 | APNIC | JP | 31st Jul 1989 |
| 192.55.198.0/24 | 256 | APNIC | AU | 16th Aug 1989 |
| 192.55.238.0/24 | 256 | APNIC |  ID | 7th Jan 2026 |
| 192.55.46.0/23 | 512 | APNIC |  CN | 26th Jun 1989 |
| 192.55.68.0/22 | 1k | APNIC | CN | 26th Jun 1989 |
| 192.58.133.0/24 | 256 | APNIC | AU | 20th Sept 1989 |
| 192.58.136.0/24 | 256 | APNIC | AU | 20th Sept 1989 |
| 192.65.250.0/24 | 256 | APNIC | AU | 17th Feb 2011 |
| 192.67.12.0/24 | 256 | APNIC | AU | 18th Dec 1989 |
| 192.67.217.0/24 | 256 | APNIC | AU | 14th Aug 2026 |
| 192.67.84.0/24 | 256 | APNIC | AU | 20th Jan 1990 |
| 192.70.219.0/24 | 256 | APNIC | AU | 9th Apr 1990 |
| 192.72.252.0/24 | 256 | APNIC |  TW | 27th Jun 1990 |
| 192.72.3.0/24 | 256 | APNIC | TW | 9th Dec 1992 |
| 192.73.66.0/24 | 256 | APNIC | AU | 23rd Jul 1990 |
| 192.75.137.0/24 | 256 | APNIC |  HK | 4th Mar 2019 |
| 192.76.252.0/23 | 512 | APNIC | JP | 3rd Feb 2011 |
| 192.8.116.0/22 | 1k | APNIC |  IN | 26th Mar 1990 |
| 192.82.100.0/24 | 256 | APNIC |  MN | 30th May 1990 |
| 192.82.143.0/24 | 256 | APNIC | AU | 30th Jul 1990 |
| 192.82.161.0/24 | 256 | APNIC | AU | 3rd Aug 1990 |
| 192.83.118.0/24 | 256 | APNIC | AU | 17th Sept 1990 |
| 192.83.198.0/24 | 256 | APNIC | AU | 19th Sept 1990 |
| 192.83.224.0/24 | 256 | APNIC | AU | 26th Sept 1990 |
| 192.86.12.0/24 | 256 | APNIC |  BD | 14th Aug 2026 |
| 192.88.85.0/24 | 256 | APNIC | NZ | 26th Aug 2010 |
| 192.91.185.0/24 | 256 | APNIC | AU | 17th Jan 1991 |
| 192.91.213.0/24 | 256 | APNIC | AU | 14th Feb 2011 |
| 192.92.15.0/24 | 256 | APNIC | ID | 14th Aug 2026 |
| 192.94.122.0/24 | 256 | APNIC |  BN | 25th Feb 1991 |
| 192.94.209.0/24 | 256 | APNIC | AU | 28th Feb 1991 |
| 192.94.41.0/24 | 256 | APNIC | AU | 13th Feb 1991 |
| 193.36.112.0/22 | 1k | APNIC |  TH | 19th Oct 2018 |
| 195.128.4.0/22 | 1k | APNIC | BN | 17th Jun 2004 |
| 195.142.156.0/22 | 1k | APNIC | IN | 23rd Apr 2014 |
| 195.142.212.0/22 | 1k | APNIC | IN | 3rd Mar 2014 |
| 195.253.236.0/22 | 1k | APNIC | HK | 9th Jan 1998 |
| 196.3.72.0/24 | 256 | APNIC |  PK | 3rd Nov 1993 |
| 198.148.189.0/24 | 256 | APNIC | AU | 2nd Aug 1993 |