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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
2,394 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 192.131.28.0/23 | 512 | APNIC | AU | 9th Jan 2001 |
| 192.131.30.0/24 | 256 | APNIC | AU | 9th Jan 2001 |
| 192.132.253.0/24 | 256 | APNIC | AU | 20th Nov 1991 |
| 192.140.232.0/22 | 1k | APNIC | AU | 5th Apr 2016 |
| 192.146.232.0/24 | 256 | APNIC | AU | 24th Jan 2011 |
| 192.146.252.0/24 | 256 | APNIC | AU | 8th Feb 1992 |
| 192.146.253.0/24 | 256 | APNIC | AU | 8th Feb 1992 |
| 192.147.235.0/24 | 256 | APNIC | AU | 20th Feb 1992 |
| 192.147.246.0/24 | 256 | APNIC | AU | 25th Feb 1992 |
| 192.148.230.0/24 | 256 | APNIC | AU | 4th Mar 1992 |
| 192.149.36.0/24 | 256 | APNIC | AU | 26th Feb 1992 |
| 192.150.130.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.131.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.132.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.133.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.134.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.135.0/24 | 256 | APNIC | AU | 13th Mar 1992 |
| 192.150.136.0/24 | 256 | APNIC | AU | 7th Feb 2011 |
| 192.150.202.0/24 | 256 | APNIC | AU | 18th Mar 1992 |
| 192.150.234.0/23 | 512 | APNIC | AU | 20th Mar 1992 |
| 192.150.236.0/23 | 512 | APNIC | AU | 20th Mar 1992 |
| 192.189.159.0/24 | 256 | APNIC | AU | 11th Feb 2011 |
| 192.189.229.0/24 | 256 | APNIC | AU | 31st Jul 1992 |
| 192.189.230.0/24 | 256 | APNIC | AU | 24th Jan 2011 |
| 192.189.231.0/24 | 256 | APNIC | AU | 10th Feb 2011 |
| 192.189.232.0/24 | 256 | APNIC | AU | 7th Feb 2011 |
| 192.190.181.0/24 | 256 | APNIC | AU | 7th Aug 2025 |
| 192.190.208.0/24 | 256 | APNIC | AU | 30th Jun 1992 |
| 192.190.210.0/23 | 512 | APNIC | AU | 30th Jun 1992 |
| 192.190.212.0/22 | 1k | APNIC | AU | 30th Jun 1992 |
| 192.190.66.0/24 | 256 | APNIC | AU | 19th Jun 1992 |
| 192.195.102.0/24 | 256 | APNIC | AU | 21st Jul 1992 |
| 192.195.170.0/24 | 256 | APNIC | AU | 30th Jul 1992 |
| 192.203.176.0/24 | 256 | APNIC | AU | 18th Sept 1992 |
| 192.203.213.0/24 | 256 | APNIC | AU | 9th Oct 1992 |
| 192.203.235.0/24 | 256 | APNIC | AU | 23rd Nov 1992 |
| 192.207.113.0/24 | 256 | APNIC | AU | 25th Aug 1992 |
| 192.207.119.0/24 | 256 | APNIC | AU | 26th Aug 1992 |
| 192.207.161.0/24 | 256 | APNIC | AU | 4th Sept 1992 |
| 192.207.165.0/24 | 256 | APNIC | AU | 4th Sept 1992 |