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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 160.236.63.0/24 | 256 | APNIC |  AU | 3rd Jul 2026 |
| 160.236.69.0/24 | 256 | APNIC | AU | 10th Jul 2026 |
| 160.250.142.0/23 | 512 | APNIC | AU | 2nd Dec 2024 |
| 160.64.0.0/16 | 65.5k | APNIC | AU | 23rd Apr 1992 |
| 162.12.240.0/22 | 1k | APNIC | AU | 13th Dec 2018 |
| 162.146.0.0/15 | 131k | APNIC | AU | 6th Jan 1993 |
| 162.4.206.0/24 | 256 | APNIC | AU | 4th Jun 2026 |
| 162.4.207.0/24 | 256 | APNIC | AU | 5th Jun 2026 |
| 163.122.0.0/16 | 65.5k | APNIC | AU | 20th Jul 1992 |
| 163.128.119.0/24 | 256 | APNIC | AU | 27th Mar 2026 |
| 163.128.194.0/24 | 256 | APNIC | AU | 10th Apr 2026 |
| 163.128.244.0/23 | 512 | APNIC | AU | 16th Apr 2026 |
| 163.128.247.0/24 | 256 | APNIC | AU | 17th Apr 2026 |
| 163.128.97.0/24 | 256 | APNIC | AU | 23rd Mar 2026 |
| 163.47.124.0/22 | 1k | APNIC | AU | 29th May 2014 |
| 163.47.18.0/24 | 256 | APNIC | AU | 2nd Jun 2014 |
| 163.47.196.0/22 | 1k | APNIC | AU | 30th May 2014 |
| 163.47.216.0/22 | 1k | APNIC | AU | 30th May 2014 |
| 163.47.47.0/24 | 256 | APNIC | AU | 13th Jun 2014 |
| 163.47.60.0/22 | 1k | APNIC | AU | 28th May 2014 |
| 163.52.19.0/24 | 256 | APNIC | AU | 19th Aug 2026 |
| 163.52.20.0/23 | 512 | APNIC | AU | 18th Aug 2026 |
| 163.52.34.0/24 | 256 | APNIC | AU | 20th Aug 2026 |
| 163.53.228.0/22 | 1k | APNIC | AU | 14th Jul 2014 |
| 163.53.232.0/22 | 1k | APNIC | AU | 14th Jul 2014 |
| 163.53.68.0/22 | 1k | APNIC | AU | 9th Jul 2014 |
| 165.101.178.0/24 | 256 | APNIC | AU | 10th Jul 2025 |
| 165.240.0.0/16 | 65.5k | APNIC | AU | 4th Oct 1993 |
| 165.31.0.0/16 | 65.5k | APNIC | AU | 9th Apr 1993 |
| 168.130.0.0/16 | 65.5k | APNIC | AU | 25th Apr 1994 |
| 168.140.192.0/22 | 1k | APNIC | AU | 10th May 1994 |
| 168.140.200.0/21 | 2k | APNIC | AU | 10th May 1994 |
| 168.140.208.0/20 | 4.1k | APNIC | AU | 10th May 1994 |
| 168.152.0.0/16 | 65.5k | APNIC | AU | 6th Apr 1994 |
| 168.198.0.0/16 | 65.5k | APNIC | AU | 17th Jun 1994 |
| 170.157.0.0/16 | 65.5k | APNIC | AU | 20th Jun 1994 |
| 175.106.28.0/22 | 1k | APNIC | AU | 15th Feb 2011 |
| 175.184.200.0/21 | 2k | APNIC | AU | 29th Jan 2010 |
| 175.184.208.0/21 | 2k | APNIC | AU | 29th Jan 2010 |
| 180.94.220.0/22 | 1k | APNIC | AU | 5th Aug 2009 |
| 185.117.4.0/22 | 1k | RIPE NCC | AU | 11th Sept 2015 |
| 185.231.172.0/22 | 1k | RIPE NCC | AU | 13th Nov 2017 |
| 185.29.228.0/23 | 512 | RIPE NCC | AU | 3rd Jul 2013 |
| 192.101.134.0/24 | 256 | APNIC | AU | 27th Jun 1991 |
| 192.111.32.0/24 | 256 | APNIC | AU | 4th Jun 1991 |
| 192.124.10.0/23 | 512 | APNIC | AU | 12th Sept 1991 |
| 192.124.117.0/24 | 256 | APNIC | AU | 23rd Sept 1991 |
| 192.124.12.0/23 | 512 | APNIC | AU | 12th Sept 1991 |
| 192.124.14.0/24 | 256 | APNIC | AU | 12th Sept 1991 |
| 192.131.27.0/24 | 256 | APNIC | AU | 9th Jan 2001 |