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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.26.220.0/24 | 256 | APNIC |  AU | 17th May 1990 |
| 192.26.221.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.26.222.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.26.223.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.26.224.0/23 | 512 | APNIC | AU | 17th May 1990 |
| 192.26.226.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.26.227.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.26.228.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.26.229.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.35.248.0/24 | 256 | APNIC | AU | 17th May 1990 |
| 192.43.208.0/24 | 256 | APNIC | AU | 5th Dec 1988 |
| 192.43.229.0/24 | 256 | APNIC | AU | 16th Dec 1988 |
| 192.48.248.0/24 | 256 | APNIC | AU | 11th Feb 2011 |
| 192.52.171.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.172.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.173.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.174.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.175.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.176.0/24 | 256 | APNIC | AU | 26th Apr 1989 |
| 192.52.196.0/23 | 512 | APNIC | AU | 24th Feb 2011 |
| 192.54.137.0/24 | 256 | APNIC | AU | 7th Feb 2011 |
| 192.55.198.0/24 | 256 | APNIC | AU | 16th Aug 1989 |
| 192.58.133.0/24 | 256 | APNIC | AU | 20th Sept 1989 |
| 192.58.136.0/24 | 256 | APNIC | AU | 20th Sept 1989 |
| 192.65.250.0/24 | 256 | APNIC | AU | 17th Feb 2011 |
| 192.67.12.0/24 | 256 | APNIC | AU | 18th Dec 1989 |
| 192.67.217.0/24 | 256 | APNIC | AU | 14th Aug 2026 |
| 192.67.84.0/24 | 256 | APNIC | AU | 20th Jan 1990 |
| 192.70.219.0/24 | 256 | APNIC | AU | 9th Apr 1990 |
| 192.73.66.0/24 | 256 | APNIC | AU | 23rd Jul 1990 |
| 192.82.143.0/24 | 256 | APNIC | AU | 30th Jul 1990 |
| 192.82.161.0/24 | 256 | APNIC | AU | 3rd Aug 1990 |
| 192.83.118.0/24 | 256 | APNIC | AU | 17th Sept 1990 |
| 192.83.198.0/24 | 256 | APNIC | AU | 19th Sept 1990 |
| 192.83.224.0/24 | 256 | APNIC | AU | 26th Sept 1990 |
| 192.91.185.0/24 | 256 | APNIC | AU | 17th Jan 1991 |
| 192.91.213.0/24 | 256 | APNIC | AU | 14th Feb 2011 |
| 192.94.209.0/24 | 256 | APNIC | AU | 28th Feb 1991 |
| 192.94.41.0/24 | 256 | APNIC | AU | 13th Feb 1991 |
| 193.36.73.0/24 | 256 | RIPE NCC | AU | 8th Oct 2019 |
| 195.43.154.0/24 | 256 | RIPE NCC | AU | 13th Jun 2008 |
| 195.96.135.0/24 | 256 | RIPE NCC | AU | 2nd Nov 2021 |
| 198.148.189.0/24 | 256 | APNIC | AU | 2nd Aug 1993 |
| 198.148.196.0/23 | 512 | APNIC | AU | 2nd Aug 1993 |
| 198.244.10.0/23 | 512 | APNIC | AU | 16th Oct 2012 |
| 198.49.2.0/24 | 256 | APNIC | AU | 3rd Feb 2011 |
| 198.49.87.0/24 | 256 | APNIC | AU | 10th Jan 2011 |
| 198.51.211.0/24 | 256 | APNIC | AU | 17th Feb 2011 |
| 198.56.18.0/23 | 512 | APNIC | AU | 28th Jul 2025 |
| 2001:360:4000::/34 | 1.1B × /64 | APNIC | AU | 15th Aug 2002 |