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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.183.41.0/24 | 256 | APNIC |  AU | 7th Mar 2022 |
| 103.184.253.0/24 | 256 | APNIC | AU | 27th Mar 2022 |
| 103.186.13.0/24 | 256 | APNIC | AU | 8th Apr 2022 |
| 103.187.120.0/23 | 512 | APNIC | AU | 17th May 2022 |
| 103.187.239.0/24 | 256 | APNIC | AU | 20th May 2022 |
| 103.189.8.0/23 | 512 | APNIC | AU | 3rd Jun 2022 |
| 103.192.196.0/24 | 256 | APNIC | AU | 22nd Jul 2015 |
| 103.196.84.0/24 | 256 | APNIC | AU | 18th Sept 2015 |
| 103.197.214.0/23 | 512 | APNIC | AU | 9th Oct 2015 |
| 103.198.130.0/24 | 256 | APNIC | AU | 21st Oct 2015 |
| 103.2.172.0/22 | 1k | APNIC | AU | 21st Apr 2011 |
| 103.2.176.0/22 | 1k | APNIC | AU | 21st Apr 2011 |
| 103.20.100.0/24 | 256 | APNIC | AU | 24th Aug 2023 |
| 103.20.56.0/24 | 256 | APNIC | AU | 9th Dec 2015 |
| 103.203.190.0/23 | 512 | APNIC | AU | 2nd Dec 2015 |
| 103.203.246.0/23 | 512 | APNIC | AU | 26th Sept 2023 |
| 103.207.30.0/23 | 512 | APNIC | AU | 22nd Jan 2016 |
| 103.207.92.0/24 | 256 | APNIC | AU | 25th Jan 2016 |
| 103.208.92.0/23 | 512 | APNIC | AU | 3rd Feb 2016 |
| 103.209.162.0/23 | 512 | APNIC | AU | 19th Feb 2016 |
| 103.210.194.0/23 | 512 | APNIC | AU | 3rd Mar 2016 |
| 103.210.223.0/24 | 256 | APNIC | AU | 7th Mar 2016 |
| 103.210.248.0/23 | 512 | APNIC | AU | 7th Mar 2016 |
| 103.210.251.0/24 | 256 | APNIC | AU | 9th Mar 2016 |
| 103.211.48.0/24 | 256 | APNIC | AU | 10th Mar 2016 |
| 103.214.28.0/23 | 512 | APNIC | AU | 8th Apr 2016 |
| 103.215.23.0/24 | 256 | APNIC | AU | 21st Apr 2016 |
| 103.215.88.0/22 | 1k | APNIC | AU | 21st Apr 2016 |
| 103.216.133.0/24 | 256 | APNIC | AU | 29th Apr 2016 |
| 103.217.248.0/24 | 256 | APNIC | AU | 10th May 2016 |
| 103.221.84.0/23 | 512 | APNIC | AU | 1st Jun 2016 |
| 103.223.138.0/23 | 512 | APNIC | AU | 6th Jun 2016 |
| 103.224.163.0/24 | 256 | APNIC | AU | 31st Jan 2014 |
| 103.225.232.0/22 | 1k | APNIC | AU | 14th Feb 2014 |
| 103.226.68.0/22 | 1k | APNIC | AU | 21st Feb 2014 |
| 103.228.133.0/24 | 256 | APNIC | AU | 24th Nov 2015 |
| 103.230.72.0/22 | 1k | APNIC | AU | 29th Apr 2014 |
| 103.232.132.0/22 | 1k | APNIC | AU | 29th May 2014 |
| 103.232.170.0/23 | 512 | APNIC | AU | 30th May 2014 |
| 103.232.96.0/22 | 1k | APNIC | AU | 27th May 2014 |
| 103.233.16.0/22 | 1k | APNIC | AU | 4th Jun 2014 |
| 103.233.242.0/24 | 256 | APNIC | AU | 16th Jun 2014 |
| 103.233.28.0/23 | 512 | APNIC | AU | 4th Jun 2014 |
| 103.234.14.0/23 | 512 | APNIC | AU | 18th Jun 2014 |
| 103.234.163.0/24 | 256 | APNIC | AU | 25th Jun 2014 |
| 103.234.248.0/22 | 1k | APNIC | AU | 30th Jun 2014 |
| 103.235.154.0/24 | 256 | APNIC | AU | 9th Jul 2014 |
| 103.235.36.0/22 | 1k | APNIC | AU | 2nd Jul 2014 |
| 103.238.195.0/24 | 256 | APNIC | AU | 30th Jul 2014 |
| 103.239.106.0/23 | 512 | APNIC | AU | 5th Aug 2014 |