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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.90.20.0/22 | 1k | APNIC |  AU | 10th Apr 2017 |
| 103.90.65.0/24 | 256 | APNIC | AU | 12th Apr 2017 |
| 103.92.143.0/24 | 256 | APNIC | AU | 11th May 2017 |
| 103.92.92.0/23 | 512 | APNIC | AU | 8th May 2017 |
| 103.94.152.0/22 | 1k | APNIC | AU | 7th Jun 2017 |
| 103.94.156.0/24 | 256 | APNIC | AU | 7th Jun 2017 |
| 103.96.56.0/22 | 1k | APNIC | AU | 3rd Jul 2017 |
| 103.97.217.0/24 | 256 | APNIC | AU | 26th Jul 2017 |
| 103.97.250.0/24 | 256 | APNIC | AU | 21st Jun 2023 |
| 103.99.226.0/24 | 256 | APNIC | AU | 30th Aug 2017 |
| 103.99.65.0/24 | 256 | APNIC | AU | 22nd Aug 2017 |
| 106.0.1.0/24 | 256 | APNIC | AU | 2nd Mar 2011 |
| 110.232.176.0/22 | 1k | APNIC | AU | 27th May 2009 |
| 110.36.232.0/23 | 512 | APNIC | AU | 24th Feb 2009 |
| 110.36.57.0/24 | 256 | APNIC | AU | 24th Feb 2009 |
| 110.76.136.0/22 | 1k | APNIC | AU | 5th Apr 2011 |
| 111.235.144.0/22 | 1k | APNIC | AU | 18th Aug 2009 |
| 113.30.224.0/22 | 1k | APNIC | AU | 17th Oct 2008 |
| 114.78.0.0/16 | 65.5k | APNIC | AU | 14th May 2008 |
| 116.213.4.0/24 | 256 | APNIC | AU | 27th Apr 2007 |
| 116.66.160.0/20 | 4.1k | APNIC | AU | 3rd May 2007 |
| 117.121.248.0/21 | 2k | APNIC | AU | 16th Aug 2007 |
| 117.18.232.0/21 | 2k | APNIC | AU | 15th Jun 2007 |
| 117.18.80.0/21 | 2k | APNIC | AU | 7th Jun 2007 |
| 118.127.168.0/21 | 2k | APNIC | AU | 21st Nov 2007 |
| 118.127.176.0/20 | 4.1k | APNIC | AU | 21st Nov 2007 |
| 119.161.48.0/20 | 4.1k | APNIC | AU | 25th Feb 2011 |
| 119.63.212.0/22 | 1k | APNIC | AU | 22nd Jan 2008 |
| 119.77.0.0/18 | 16.4k | APNIC | AU | 24th Jan 2008 |
| 120.29.32.0/19 | 8.2k | APNIC | AU | 14th Mar 2008 |
| 121.101.136.0/21 | 2k | APNIC | AU | 15th Nov 2007 |
| 123.102.0.0/16 | 65.5k | APNIC | AU | 5th Dec 2006 |
| 123.108.104.0/22 | 1k | APNIC | AU | 23rd Dec 2008 |
| 123.255.208.0/21 | 2k | APNIC | AU | 19th Nov 2008 |
| 123.255.216.0/21 | 2k | APNIC | AU | 18th Mar 2009 |
| 123.98.128.0/20 | 4.1k | APNIC | AU | 23rd Nov 2006 |
| 124.108.0.0/22 | 1k | APNIC | AU | 31st Dec 2010 |
| 124.150.138.0/24 | 256 | APNIC | AU | 7th Mar 2016 |
| 124.158.24.0/22 | 1k | APNIC | AU | 8th Feb 2010 |
| 125.63.48.0/20 | 4.1k | APNIC | AU | 17th Jan 2011 |
| 130.195.224.0/20 | 4.1k | APNIC | AU | 26th Sept 1988 |
| 131.185.0.0/16 | 65.5k | APNIC | AU | 3rd Jan 1989 |
| 134.18.0.0/16 | 65.5k | APNIC | AU | 13th Apr 1989 |
| 134.42.226.0/24 | 256 | APNIC | AU | 25th Apr 1989 |
| 137.59.168.0/22 | 1k | APNIC | AU | 5th Feb 2016 |
| 138.252.216.0/24 | 256 | APNIC | AU | 17th Nov 2025 |
| 138.252.250.0/23 | 512 | APNIC | AU | 19th Nov 2025 |
| 140.168.192.0/19 | 8.2k | APNIC | AU | 8th May 1990 |
| 141.120.0.0/16 | 65.5k | APNIC | AU | 24th Jul 1990 |
| 143.174.128.0/18 | 16.4k | APNIC | AU | 1st Oct 1990 |