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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks in Australia
2,385 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 202.73.144.0/20 | 4.1k | APNIC |  AU | 11th Apr 2011 |
| 202.74.252.0/24 | 256 | APNIC | AU | 17th Jun 2005 |
| 202.77.136.0/24 | 256 | APNIC | AU | 22nd Nov 2005 |
| 202.77.88.0/22 | 1k | APNIC | AU | 23rd Nov 2007 |
| 202.78.32.0/20 | 4.1k | APNIC | AU | 5th Jun 2002 |
| 202.8.64.0/24 | 256 | APNIC | AU | 7th Jan 2011 |
| 202.86.16.0/21 | 2k | APNIC | AU | 28th Sept 2004 |
| 202.86.250.0/24 | 256 | APNIC | AU | 3rd Mar 2006 |
| 202.9.33.0/24 | 256 | APNIC | AU | 5th Dec 2003 |
| 202.9.68.0/24 | 256 | APNIC | AU | 16th Aug 2018 |
| 202.90.160.0/20 | 4.1k | APNIC | AU | 29th Aug 2002 |
| 202.90.197.0/24 | 256 | APNIC | AU | 18th Jul 2008 |
| 202.90.206.0/23 | 512 | APNIC | AU | 29th Jul 2008 |
| 202.90.32.0/24 | 256 | APNIC | AU | 15th Sept 2010 |
| 202.91.4.0/22 | 1k | APNIC | AU | 7th Jun 2006 |
| 202.92.240.0/21 | 2k | APNIC | AU | 1st Apr 2005 |
| 202.92.32.0/20 | 4.1k | APNIC | AU | 14th May 2001 |
| 202.94.69.0/24 | 256 | APNIC | AU | 6th Dec 2010 |
| 202.94.78.0/23 | 512 | APNIC | AU | 15th Dec 2010 |
| 203.0.101.0/24 | 256 | APNIC | AU | 12th Nov 1993 |
| 203.0.103.0/24 | 256 | APNIC | AU | 17th Nov 1993 |
| 203.0.121.0/24 | 256 | APNIC | AU | 21st Sept 1993 |
| 203.0.123.0/24 | 256 | APNIC | AU | 22nd Sept 1993 |
| 203.0.138.0/24 | 256 | APNIC | AU | 27th Sept 1993 |
| 203.0.153.0/24 | 256 | APNIC | AU | 25th Nov 1993 |
| 203.0.25.0/24 | 256 | APNIC | AU | 6th Sept 1993 |
| 203.0.32.0/22 | 1k | APNIC | AU | 7th Sept 1993 |
| 203.0.41.0/24 | 256 | APNIC | AU | 7th Sept 1993 |
| 203.0.48.0/20 | 4.1k | APNIC | AU | 8th Sept 1993 |
| 203.0.68.0/22 | 1k | APNIC | AU | 14th Sept 1993 |
| 203.0.84.0/22 | 1k | APNIC | AU | 17th Sept 1993 |
| 203.0.92.0/22 | 1k | APNIC | AU | 17th Sept 1993 |
| 203.1.128.0/18 | 16.4k | APNIC | AU | 5th Nov 1993 |
| 203.1.222.0/24 | 256 | APNIC | AU | 24th Feb 2010 |
| 203.1.223.0/24 | 256 | APNIC | AU | 24th Feb 2010 |
| 203.1.24.0/24 | 256 | APNIC | AU | 13th Oct 1993 |
| 203.1.248.0/22 | 1k | APNIC | AU | 13th Dec 1993 |
| 203.1.29.0/24 | 256 | APNIC | AU | 13th Oct 1993 |
| 203.1.3.0/24 | 256 | APNIC | AU | 29th Nov 1993 |
| 203.1.30.0/24 | 256 | APNIC | AU | 13th Oct 1993 |
| 203.10.104.0/24 | 256 | APNIC | AU | 22nd Dec 1994 |
| 203.10.106.0/24 | 256 | APNIC | AU | 22nd Dec 1994 |
| 203.10.107.0/24 | 256 | APNIC | AU | 9th Oct 1995 |
| 203.10.111.0/24 | 256 | APNIC | AU | 23rd Dec 1994 |
| 203.10.32.0/24 | 256 | APNIC | AU | 18th Nov 1994 |
| 203.10.33.0/24 | 256 | APNIC | AU | 18th Nov 1994 |
| 203.10.78.0/24 | 256 | APNIC | AU | 14th Dec 1994 |
| 203.10.92.0/24 | 256 | APNIC | AU | 15th Dec 1994 |
| 203.10.93.0/24 | 256 | APNIC | AU | 21st Dec 1994 |
| 203.10.94.0/24 | 256 | APNIC | AU | 21st Dec 1994 |