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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
2,381 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 43.230.100.0/22 | 1k | APNIC |  AU | 4th Feb 2015 |
| 43.240.96.0/22 | 1k | APNIC | AU | 14th Aug 2014 |
| 43.249.128.0/22 | 1k | APNIC | AU | 9th Oct 2014 |
| 43.250.68.0/22 | 1k | APNIC | AU | 22nd Oct 2014 |
| 43.252.0.0/22 | 1k | APNIC | AU | 4th Jun 2014 |
| 43.252.76.0/22 | 1k | APNIC | AU | 5th Jun 2014 |
| 43.255.128.0/22 | 1k | APNIC | AU | 5th Aug 2014 |
| 45.116.48.0/22 | 1k | APNIC | AU | 25th Sept 2017 |
| 45.117.24.0/22 | 1k | APNIC | AU | 14th May 2015 |
| 45.124.164.0/22 | 1k | APNIC | AU | 27th Jul 2015 |
| 45.126.192.0/22 | 1k | APNIC | AU | 7th Sept 2015 |
| 45.127.172.0/22 | 1k | APNIC | AU | 22nd Sept 2015 |
| 45.127.92.0/22 | 1k | APNIC | AU | 15th Sept 2015 |
| 45.248.140.0/22 | 1k | APNIC | AU | 6th May 2016 |
| 45.249.60.0/23 | 512 | APNIC | AU | 11th Aug 2026 |
| 45.249.62.0/24 | 256 | APNIC | AU | 11th Aug 2026 |
| 45.65.12.0/24 | 256 | APNIC | AU | 28th May 2014 |
| 45.65.13.0/24 | 256 | APNIC | AU | 28th May 2014 |
| 45.65.14.0/23 | 512 | APNIC | AU | 28th May 2014 |
| 46.249.112.0/21 | 2k | RIPE NCC | AU | 30th Dec 2010 |
| 49.143.224.0/22 | 1k | APNIC | AU | 16th Nov 2010 |
| 58.84.208.0/21 | 2k | APNIC | AU | 21st Sept 2006 |
| 61.45.248.0/23 | 512 | APNIC | AU | 27th Sept 2010 |
| 61.45.250.0/24 | 256 | APNIC | AU | 7th Apr 2010 |
| 61.45.251.0/24 | 256 | APNIC | AU | 7th Apr 2010 |
| 61.45.252.0/22 | 1k | APNIC | AU | 7th Apr 2010 |
| 68.65.228.0/22 | 1k | APNIC | AU | 17th Sept 2008 |
| 68.65.232.0/21 | 2k | APNIC | AU | 17th Sept 2008 |
| 87.236.166.0/24 | 256 | RIPE NCC | AU | 19th Aug 2021 |
| 91.204.80.0/24 | 256 | APNIC | AU | 4th Jun 2008 |
| 95.131.201.0/24 | 256 | RIPE NCC | AU | 27th May 2024 |