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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
2,381 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 1.2.3.0/24 | 256 | APNIC |  AU | 11th Aug 2011 |
| 1.4.0.0/24 | 256 | APNIC | AU | 11th Aug 2011 |
| 103.1.0.0/22 | 1k | APNIC | AU | 5th Apr 2011 |
| 103.1.4.0/24 | 256 | APNIC | AU | 5th Apr 2011 |
| 103.1.76.0/22 | 1k | APNIC | AU | 18th Apr 2011 |
| 103.10.232.0/24 | 256 | APNIC | AU | 3rd Aug 2011 |
| 103.100.194.0/24 | 256 | APNIC | AU | 12th Sept 2017 |
| 103.101.135.0/24 | 256 | APNIC | AU | 26th Sept 2017 |
| 103.101.173.0/24 | 256 | APNIC | AU | 28th Sept 2017 |
| 103.102.53.0/24 | 256 | APNIC | AU | 12th Oct 2017 |
| 103.103.114.0/24 | 256 | APNIC | AU | 7th Nov 2017 |
| 103.104.166.0/23 | 512 | APNIC | AU | 28th Nov 2017 |
| 103.104.200.0/23 | 512 | APNIC | AU | 29th Nov 2017 |
| 103.107.149.0/24 | 256 | APNIC | AU | 16th Jan 2018 |
| 103.107.185.0/24 | 256 | APNIC | AU | 17th Jan 2018 |
| 103.107.224.0/23 | 512 | APNIC | AU | 19th Jan 2018 |
| 103.109.232.0/24 | 256 | APNIC | AU | 21st Feb 2018 |
| 103.109.77.0/24 | 256 | APNIC | AU | 12th Feb 2018 |
| 103.11.184.0/23 | 512 | APNIC | AU | 28th Oct 2011 |
| 103.110.82.0/24 | 256 | APNIC | AU | 2nd Mar 2018 |
| 103.111.168.0/22 | 1k | APNIC | AU | 19th Mar 2018 |
| 103.111.176.0/22 | 1k | APNIC | AU | 19th Mar 2018 |
| 103.111.87.0/24 | 256 | APNIC | AU | 16th Mar 2018 |
| 103.114.9.0/24 | 256 | APNIC | AU | 19th Apr 2018 |
| 103.115.165.0/24 | 256 | APNIC | AU | 18th May 2018 |
| 103.115.22.0/24 | 256 | APNIC | AU | 11th May 2018 |
| 103.116.134.0/24 | 256 | APNIC | AU | 31st May 2018 |
| 103.116.195.0/24 | 256 | APNIC | AU | 7th Jun 2018 |
| 103.117.96.0/23 | 512 | APNIC | AU | 22nd Jun 2018 |
| 103.117.99.0/24 | 256 | APNIC | AU | 25th Jun 2018 |
| 103.119.222.0/24 | 256 | APNIC | AU | 27th Jul 2018 |
| 103.12.188.0/22 | 1k | APNIC | AU | 16th Jul 2012 |
| 103.12.22.0/24 | 256 | APNIC | AU | 31st May 2012 |
| 103.120.137.0/24 | 256 | APNIC | AU | 6th Aug 2018 |
| 103.120.219.0/24 | 256 | APNIC | AU | 9th Aug 2018 |
| 103.120.77.0/24 | 256 | APNIC | AU | 2nd Aug 2018 |
| 103.122.120.0/24 | 256 | APNIC | AU | 17th Sept 2018 |
| 103.122.166.0/23 | 512 | APNIC | AU | 19th Sept 2018 |
| 103.125.152.0/23 | 512 | APNIC | AU | 19th Nov 2018 |
| 103.125.187.0/24 | 256 | APNIC | AU | 22nd Nov 2018 |
| 103.125.204.0/22 | 1k | APNIC | AU | 22nd Nov 2018 |
| 103.126.121.0/24 | 256 | APNIC | AU | 4th Dec 2018 |
| 103.126.186.0/24 | 256 | APNIC | AU | 5th Dec 2018 |
| 103.13.216.0/23 | 512 | APNIC | AU | 31st Jul 2012 |
| 103.130.111.0/24 | 256 | APNIC | AU | 8th Oct 2018 |
| 103.131.42.0/24 | 256 | APNIC | AU | 16th Oct 2018 |
| 103.131.82.0/24 | 256 | APNIC | AU | 21st Jun 2023 |
| 103.133.161.0/24 | 256 | APNIC | AU | 29th Jan 2019 |
| 103.134.182.0/23 | 512 | APNIC | AU | 15th Feb 2019 |
| 103.135.13.0/24 | 256 | APNIC | AU | 20th Feb 2019 |