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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
2,385 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 207.158.64.0/18 | 16.4k | APNIC | 6th Sept 2000 | |
| 210.0.0.0/19 | 8.2k | APNIC | 9th Sept 1996 | |
| 210.247.208.0/20 | 4.1k | APNIC | 27th May 2008 | |
| 210.247.224.0/20 | 4.1k | APNIC | 12th Aug 2008 | |
| 210.4.80.0/21 | 2k | APNIC | 14th Jun 2006 | |
| 216.118.0.0/18 | 16.4k | APNIC | 11th Nov 1998 | |
| 216.157.157.0/24 | 256 | APNIC | 9th Aug 2002 | |
| 216.157.158.0/23 | 512 | APNIC | 9th Aug 2002 | |
| 218.100.0.0/24 | 256 | APNIC | 13th Feb 2002 | |
| 218.100.12.0/24 | 256 | APNIC | 16th May 2003 | |
| 218.100.13.0/24 | 256 | APNIC | 19th May 2003 | |
| 218.100.19.0/24 | 256 | APNIC | 2nd Apr 2004 | |
| 218.100.2.0/23 | 512 | APNIC | 19th Nov 2002 | |
| 218.100.36.0/24 | 256 | APNIC | 23rd Sept 2005 | |
| 218.100.39.0/24 | 256 | APNIC | 15th Mar 2006 | |
| 218.100.40.0/24 | 256 | APNIC | 30th May 2006 | |
| 218.100.50.0/24 | 256 | APNIC | 19th Nov 2007 | |
| 218.100.52.0/23 | 512 | APNIC | 3rd Mar 2008 | |
| 218.100.54.0/24 | 256 | APNIC | 3rd Mar 2008 | |
| 218.100.76.0/24 | 256 | APNIC | 15th Nov 2010 | |
| 218.100.78.0/24 | 256 | APNIC | 6th Jan 2011 | |
| 218.185.0.0/17 | 32.8k | APNIC | 25th Oct 2001 | |
| 218.214.0.0/16 | 65.5k | APNIC | 19th Jun 2003 | |
| 218.215.0.0/16 | 65.5k | APNIC | 21st Jan 2005 | |
| 220.101.128.0/18 | 16.4k | APNIC | 28th Jan 2004 | |
| 220.158.188.0/22 | 1k | APNIC | 6th Oct 2015 | |
| 220.247.144.0/20 | 4.1k | APNIC | 30th Mar 2011 | |
| 223.25.228.0/22 | 1k | APNIC | 16th Aug 2010 | |
| 223.255.255.0/24 | 256 | APNIC | 11th Aug 2011 | |
| 223.27.178.0/23 | 512 | APNIC | 1st Sept 2010 | |
| 24.233.128.0/20 | 4.1k | APNIC | 7th Oct 2002 | |
| 2400:10e0::/32 | 4.3B × /64 | APNIC | 8th Oct 2021 | |
| 2400:13c0::/32 | 4.3B × /64 | APNIC | 11th Nov 2016 | |
| 2400:1bc0::/32 | 4.3B × /64 | APNIC | 14th Nov 2016 | |
| 2400:1ee0::/32 | 4.3B × /64 | APNIC | 10th Nov 2021 | |
| 2400:1f20::/32 | 4.3B × /64 | APNIC | 10th Nov 2021 | |
| 2400:1f60::/32 | 4.3B × /64 | APNIC | 10th Nov 2021 | |
| 2400:1fa0::/32 | 4.3B × /64 | APNIC | 10th Nov 2021 | |
| 2400:37c0::/32 | 4.3B × /64 | APNIC | 17th Nov 2016 | |
| 2400:3880::/32 | 4.3B × /64 | APNIC | 21st Oct 2013 | |
| 2400:3900::/32 | 4.3B × /64 | APNIC | 6th Apr 2011 | |
| 2400:3c80::/32 | 4.3B × /64 | APNIC | 24th Oct 2013 | |
| 2400:3d00::/32 | 4.3B × /64 | APNIC | 7th Apr 2011 | |
| 2400:4b00::/32 | 4.3B × /64 | APNIC | 12th Apr 2011 | |
| 2400:4b80::/32 | 4.3B × /64 | APNIC | 4th Nov 2013 | |
| 2400:4d00::/32 | 4.3B × /64 | APNIC | 12th Apr 2011 | |
| 2400:5560::/32 | 4.3B × /64 | APNIC | 28th Jan 2022 | |
| 2400:5b80::/32 | 4.3B × /64 | APNIC | 11th Nov 2013 | |
| 2400:5e60::/32 | 4.3B × /64 | APNIC | 1st Mar 2022 | |
| 2400:6560::/32 | 4.3B × /64 | APNIC | 16th Mar 2022 |