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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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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 |
|---|---|---|---|---|
| 2407:8280::/32 | 4.3B × /64 | APNIC |  AU | 12th Oct 2016 |
| 2407:8300::/32 | 4.3B × /64 | APNIC | AU | 16th Jul 2013 |
| 2407:8380::/32 | 4.3B × /64 | APNIC | AU | 12th Oct 2016 |
| 2407:8400::/32 | 4.3B × /64 | APNIC | AU | 4th Mar 2010 |
| 2407:8600::/32 | 4.3B × /64 | APNIC | AU | 1st Mar 2011 |
| 2407:8900::/32 | 4.3B × /64 | APNIC | AU | 17th Jul 2013 |
| 2407:8e00::/32 | 4.3B × /64 | APNIC | AU | 4th Mar 2011 |
| 2407:9001::/32 | 4.3B × /64 | APNIC | AU | 4th Oct 2017 |
| 2407:9140::/32 | 4.3B × /64 | APNIC | AU | 17th Jun 2021 |
| 2407:a100::/32 | 4.3B × /64 | APNIC | AU | 24th Jul 2013 |
| 2407:a240::/32 | 4.3B × /64 | APNIC | AU | 4th Jul 2021 |
| 2407:a280::/32 | 4.3B × /64 | APNIC | AU | 28th Oct 2016 |
| 2407:ac80::/32 | 4.3B × /64 | APNIC | AU | 2nd Nov 2016 |
| 2407:ad40::/32 | 4.3B × /64 | APNIC | AU | 22nd Jul 2021 |
| 2407:ae00::/32 | 4.3B × /64 | APNIC | AU | 9th Mar 2011 |
| 2407:af00::/32 | 4.3B × /64 | APNIC | AU | 1st Aug 2013 |
| 2407:b040::/32 | 4.3B × /64 | APNIC | AU | 24th Jul 2021 |
| 2407:b500::/32 | 4.3B × /64 | APNIC | AU | 7th Aug 2013 |
| 2407:b600::/32 | 4.3B × /64 | APNIC | AU | 10th Mar 2011 |
| 2407:be00::/32 | 4.3B × /64 | APNIC | AU | 15th Mar 2011 |
| 2407:c500::/32 | 4.3B × /64 | APNIC | AU | 20th Aug 2013 |
| 2407:c80::/32 | 4.3B × /64 | APNIC | AU | 1st Sept 2016 |
| 2407:ca80::/32 | 4.3B × /64 | APNIC | AU | 4th Nov 2016 |
| 2407:ce00::/32 | 4.3B × /64 | APNIC | AU | 22nd Mar 2011 |
| 2407:cec0::/32 | 4.3B × /64 | APNIC | AU | 24th Aug 2021 |
| 2407:d4c0::/32 | 4.3B × /64 | APNIC | AU | 31st Aug 2021 |
| 2407:e00::/32 | 4.3B × /64 | APNIC | AU | 15th Feb 2011 |
| 2407:ee00::/32 | 4.3B × /64 | APNIC | AU | 29th Mar 2011 |
| 2407:fac0::/32 | 4.3B × /64 | APNIC | AU | 6th Oct 2021 |
| 2407:fbc0::/32 | 4.3B × /64 | APNIC | AU | 6th Oct 2021 |
| 2407:fcc0::/32 | 4.3B × /64 | APNIC | AU | 6th Oct 2021 |
| 2407:fd00::/32 | 4.3B × /64 | APNIC | AU | 23rd Sept 2013 |
| 2407:ffc0::/32 | 4.3B × /64 | APNIC | AU | 7th Oct 2021 |
| 2602:f5be::/36 | 268M × /64 | ARIN | AU | 23rd Jul 2025 |
| 2620:47:2000::/48 | 65.5k × /64 | ARIN | AU | 4th Apr 2018 |
| 27.0.64.0/19 | 8.2k | APNIC | AU | 16th Mar 2010 |
| 27.100.0.0/22 | 1k | APNIC | AU | 25th May 2010 |
| 27.106.192.0/21 | 2k | APNIC | AU | 8th Jun 2010 |
| 27.111.85.0/24 | 256 | APNIC | AU | 2nd Jul 2010 |
| 27.111.87.0/24 | 256 | APNIC | AU | 2nd Jul 2010 |
| 27.112.100.0/22 | 1k | APNIC | AU | 8th Jul 2010 |
| 27.123.226.0/24 | 256 | APNIC | AU | 13th Aug 2026 |
| 27.131.216.0/22 | 1k | APNIC | AU | 23rd Apr 2010 |
| 27.253.0.0/17 | 32.8k | APNIC | AU | 22nd Mar 2011 |
| 27.99.0.0/17 | 32.8k | APNIC | AU | 24th May 2010 |
| 2a00:aba0::/32 | 4.3B × /64 | RIPE NCC | AU | 1st Jul 2013 |
| 2a06:7f40::/29 | 34.4B × /64 | RIPE NCC | AU | 9th Sept 2015 |
| 2a09:4c00::/29 | 34.4B × /64 | RIPE NCC | AU | 2nd Nov 2018 |
| 2a09:7080::/29 | 34.4B × /64 | RIPE NCC | AU | 12th Dec 2018 |
| 2a13:1900::/29 | 34.4B × /64 | RIPE NCC | AU | 25th Jun 2024 |