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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Australia
2,368 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 203.11.178.0/23 | 512 | APNIC |  AU | 15th Jan 1995 |
| 203.11.212.0/22 | 1k | APNIC | AU | 16th Jan 1995 |
| 203.11.64.0/24 | 256 | APNIC | AU | 23rd Dec 1994 |
| 203.110.248.0/22 | 1k | APNIC | AU | 7th Nov 1996 |
| 203.110.252.0/22 | 1k | APNIC | AU | 22nd Mar 1996 |
| 203.118.243.0/24 | 256 | APNIC | AU | 28th Oct 2008 |
| 203.119.14.0/24 | 256 | APNIC | AU | 10th Feb 2004 |
| 203.119.21.0/24 | 256 | APNIC | AU | 18th Jan 2011 |
| 203.12.119.0/24 | 256 | APNIC | AU | 9th Feb 1995 |
| 203.12.122.0/23 | 512 | APNIC | AU | 13th Feb 1995 |
| 203.12.128.0/24 | 256 | APNIC | AU | 13th Feb 1995 |
| 203.12.192.0/24 | 256 | APNIC | AU | 16th Feb 1995 |
| 203.12.193.0/24 | 256 | APNIC | AU | 16th Feb 1995 |
| 203.12.212.0/22 | 1k | APNIC | AU | 16th Apr 2010 |
| 203.12.216.0/23 | 512 | APNIC | AU | 19th Sept 2010 |
| 203.12.250.0/24 | 256 | APNIC | AU | 23rd Feb 1995 |
| 203.12.38.0/24 | 256 | APNIC | AU | 23rd Jan 1995 |
| 203.12.42.0/24 | 256 | APNIC | AU | 23rd Jan 1995 |
| 203.12.67.0/24 | 256 | APNIC | AU | 2nd Feb 1995 |
| 203.12.72.0/21 | 2k | APNIC | AU | 1st Feb 1995 |
| 203.12.82.0/24 | 256 | APNIC | AU | 2nd Feb 1995 |
| 203.12.99.0/24 | 256 | APNIC | AU | 8th Feb 1995 |
| 203.122.64.0/19 | 8.2k | APNIC | AU | 12th Sept 2002 |
| 203.122.96.0/19 | 8.2k | APNIC | AU | 3rd Oct 2003 |
| 203.123.59.0/24 | 256 | APNIC | AU | 7th Mar 2008 |
| 203.128.128.0/19 | 8.2k | APNIC | AU | 11th Apr 2011 |
| 203.128.232.0/22 | 1k | APNIC | AU | 5th Mar 2008 |
| 203.13.166.0/24 | 256 | APNIC | AU | 21st Mar 1995 |
| 203.13.172.0/24 | 256 | APNIC | AU | 21st Mar 1995 |
| 203.13.174.0/24 | 256 | APNIC | AU | 22nd Mar 1995 |
| 203.13.21.0/24 | 256 | APNIC | AU | 27th Feb 1995 |
| 203.13.226.0/24 | 256 | APNIC | AU | 26th Jul 1995 |
| 203.13.229.0/24 | 256 | APNIC | AU | 27th Mar 1995 |
| 203.13.230.0/24 | 256 | APNIC | AU | 27th Mar 1995 |
| 203.13.36.0/24 | 256 | APNIC | AU | 1st Mar 1995 |
| 203.13.38.0/24 | 256 | APNIC | AU | 1st Mar 1995 |
| 203.13.91.0/24 | 256 | APNIC | AU | 12th Mar 1995 |
| 203.131.0.0/19 | 8.2k | APNIC | AU | 4th Mar 1998 |
| 203.132.8.0/21 | 2k | APNIC | AU | 7th May 1998 |
| 203.14.103.0/24 | 256 | APNIC | AU | 17th Apr 1995 |
| 203.14.111.0/24 | 256 | APNIC | AU | 20th Apr 1995 |
| 203.14.124.0/23 | 512 | APNIC | AU | 28th Apr 1995 |
| 203.14.126.0/24 | 256 | APNIC | AU | 28th Apr 1995 |
| 203.14.127.0/24 | 256 | APNIC | AU | 28th Apr 1995 |
| 203.14.144.0/21 | 2k | APNIC | AU | 28th Apr 1995 |
| 203.14.197.0/24 | 256 | APNIC | AU | 28th Apr 1995 |
| 203.14.210.0/23 | 512 | APNIC | AU | 3rd May 1995 |
| 203.14.224.0/22 | 1k | APNIC | AU | 8th May 1995 |
| 203.14.232.0/21 | 2k | APNIC | AU | 10th May 1995 |
| 203.14.35.0/24 | 256 | APNIC | AU | 10th Apr 1995 |