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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks in Australia
2,385 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 203.62.164.0/24 | 256 | APNIC |  AU | 11th Feb 1997 |
| 203.62.189.0/24 | 256 | APNIC | AU | 14th Feb 1997 |
| 203.62.198.0/24 | 256 | APNIC | AU | 14th Feb 1997 |
| 203.62.232.0/23 | 512 | APNIC | AU | 21st Feb 1997 |
| 203.62.235.0/24 | 256 | APNIC | AU | 24th Feb 1997 |
| 203.7.132.0/22 | 1k | APNIC | AU | 5th Aug 1994 |
| 203.7.153.0/24 | 256 | APNIC | AU | 24th Aug 1994 |
| 203.7.154.0/24 | 256 | APNIC | AU | 24th Aug 1994 |
| 203.7.169.0/24 | 256 | APNIC | AU | 24th Aug 1994 |
| 203.7.207.0/24 | 256 | APNIC | AU | 25th Aug 1994 |
| 203.7.228.0/22 | 1k | APNIC | AU | 25th Aug 1994 |
| 203.8.106.0/24 | 256 | APNIC | AU | 16th Sept 1994 |
| 203.8.11.0/24 | 256 | APNIC | AU | 7th Sept 1994 |
| 203.8.113.0/24 | 256 | APNIC | AU | 20th Sept 1994 |
| 203.8.12.0/22 | 1k | APNIC | AU | 27th Sept 1995 |
| 203.8.125.0/24 | 256 | APNIC | AU | 23rd Sept 1994 |
| 203.8.16.0/23 | 512 | APNIC | AU | 9th Sept 1994 |
| 203.8.163.0/24 | 256 | APNIC | AU | 5th Mar 1996 |
| 203.8.168.0/24 | 256 | APNIC | AU | 2nd Oct 1994 |
| 203.8.196.0/24 | 256 | APNIC | AU | 7th Oct 1994 |
| 203.8.4.0/22 | 1k | APNIC | AU | 31st Aug 1994 |
| 203.8.68.0/24 | 256 | APNIC | AU | 9th Sept 1994 |
| 203.82.216.0/23 | 512 | APNIC | AU | 23rd Jan 2008 |
| 203.84.132.0/24 | 256 | APNIC | AU | 12th Feb 2007 |
| 203.84.64.0/19 | 8.2k | APNIC | AU | 4th Feb 2004 |
| 203.89.156.0/22 | 1k | APNIC | AU | 3rd Aug 2010 |
| 203.9.0.0/19 | 8.2k | APNIC | AU | 7th Oct 1994 |
| 203.9.106.0/24 | 256 | APNIC | AU | 27th Oct 1994 |
| 203.9.107.0/24 | 256 | APNIC | AU | 27th Oct 1994 |
| 203.9.128.0/21 | 2k | APNIC | AU | 27th Oct 1994 |
| 203.9.144.0/22 | 1k | APNIC | AU | 27th Oct 1994 |
| 203.9.148.0/24 | 256 | APNIC | AU | 1st Nov 1994 |
| 203.9.209.0/24 | 256 | APNIC | AU | 7th Nov 1994 |
| 203.9.59.0/24 | 256 | APNIC | AU | 25th Jul 1995 |
| 203.9.62.0/24 | 256 | APNIC | AU | 31st Mar 2011 |
| 203.9.64.0/24 | 256 | APNIC | AU | 21st Oct 1994 |
| 203.9.66.0/24 | 256 | APNIC | AU | 21st Oct 1994 |
| 203.9.67.0/24 | 256 | APNIC | AU | 21st Oct 1994 |
| 203.9.73.0/24 | 256 | APNIC | AU | 25th Oct 1994 |
| 203.94.128.0/22 | 1k | APNIC | AU | 26th May 2000 |
| 203.94.132.0/22 | 1k | APNIC | AU | 7th Jun 2000 |
| 203.94.136.0/21 | 2k | APNIC | AU | 7th Jun 2000 |
| 203.94.144.0/20 | 4.1k | APNIC | AU | 7th Jun 2000 |
| 203.94.160.0/20 | 4.1k | APNIC | AU | 18th Jun 2001 |
| 203.94.176.0/20 | 4.1k | APNIC | AU | 25th Oct 2001 |
| 203.96.172.0/22 | 1k | APNIC | AU | 16th Nov 2018 |
| 203.98.66.0/24 | 256 | APNIC | AU | 15th Jun 2000 |
| 203.98.69.0/24 | 256 | APNIC | AU | 15th Jun 2000 |
| 203.98.79.0/24 | 256 | APNIC | AU | 15th Jun 2000 |
| 204.79.133.0/24 | 256 | ARIN | AU | 14th Dec 1994 |