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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,346 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2400:9f60::/32 | 4.3B × /64 | APNIC | 11th Aug 2022 | |
| 2400:9f80::/32 | 4.3B × /64 | APNIC | 13th Feb 2014 | |
| 2400:a020::/32 | 4.3B × /64 | APNIC | 14th Aug 2022 | |
| 2400:a080::/32 | 4.3B × /64 | APNIC | 14th Feb 2014 | |
| 2400:a0a0::/32 | 4.3B × /64 | APNIC | 16th Aug 2022 | |
| 2400:a0c0::/32 | 4.3B × /64 | APNIC | 30th Jan 2017 | |
| 2400:a0e0::/32 | 4.3B × /64 | APNIC | 19th Aug 2022 | |
| 2400:a1e0::/32 | 4.3B × /64 | APNIC | 23rd Aug 2022 | |
| 2400:a220::/32 | 4.3B × /64 | APNIC | 24th Aug 2022 | |
| 2400:a2c0::/32 | 4.3B × /64 | APNIC | 31st Jan 2017 | |
| 2400:a320::/32 | 4.3B × /64 | APNIC | 26th Aug 2022 | |
| 2400:a360::/32 | 4.3B × /64 | APNIC | 26th Aug 2022 | |
| 2400:a380::/32 | 4.3B × /64 | APNIC | 17th Feb 2014 | |
| 2400:a420::/32 | 4.3B × /64 | APNIC | 30th Aug 2022 | |
| 2400:a460::/32 | 4.3B × /64 | APNIC | 30th Aug 2022 | |
| 2400:a480::/32 | 4.3B × /64 | APNIC | 18th Feb 2014 | |
| 2400:a500::/32 | 4.3B × /64 | APNIC | 4th May 2011 | |
| 2400:a580::/32 | 4.3B × /64 | APNIC | 18th Feb 2014 | |
| 2400:a5a0::/32 | 4.3B × /64 | APNIC | 31st Aug 2022 | |
| 2400:a5c0::/32 | 4.3B × /64 | APNIC | 3rd Feb 2017 | |
| 2400:a640::/32 | 4.3B × /64 | APNIC | 3rd Feb 2017 | |
| 2400:a660::/32 | 4.3B × /64 | APNIC | 1st Sept 2022 | |
| 2400:a680::/32 | 4.3B × /64 | APNIC | 19th Feb 2014 | |
| 2400:a700::/32 | 4.3B × /64 | APNIC | 4th May 2011 | |
| 2400:a720::/32 | 4.3B × /64 | APNIC | 6th Sept 2022 | |
| 2400:a760::/32 | 4.3B × /64 | APNIC | 6th Sept 2022 | |
| 2400:a780::/32 | 4.3B × /64 | APNIC | 19th Feb 2014 | |
| 2400:a880::/32 | 4.3B × /64 | APNIC | 20th Feb 2014 | |
| 2400:a8a0::/32 | 4.3B × /64 | APNIC | 8th Sept 2022 | |
| 2400:a8c0::/32 | 4.3B × /64 | APNIC | 6th Feb 2017 | |
| 2400:a900::/32 | 4.3B × /64 | APNIC | 5th May 2011 | |
| 2400:a9a0::/32 | 4.3B × /64 | APNIC | 9th Sept 2022 | |
| 2400:a9e0::/32 | 4.3B × /64 | APNIC | 12th Sept 2022 | |
| 2400:aa20::/32 | 4.3B × /64 | APNIC | 13th Sept 2022 | |
| 2400:aa40::/32 | 4.3B × /64 | APNIC | 9th Feb 2017 | |
| 2400:aa60::/32 | 4.3B × /64 | APNIC | 13th Sept 2022 | |
| 2400:ab00::/32 | 4.3B × /64 | APNIC | 5th May 2011 | |
| 2400:ab20::/32 | 4.3B × /64 | APNIC | 15th Sept 2022 | |
| 2400:ab40::/32 | 4.3B × /64 | APNIC | 10th Feb 2017 | |
| 2400:aba0::/32 | 4.3B × /64 | APNIC | 16th Sept 2022 | |
| 2400:abc0::/32 | 4.3B × /64 | APNIC | 10th Feb 2017 | |
| 2400:abe0::/32 | 4.3B × /64 | APNIC | 16th Sept 2022 | |
| 2400:ac60::/32 | 4.3B × /64 | APNIC | 16th Sept 2022 | |
| 2400:ad00::/32 | 4.3B × /64 | APNIC | 5th May 2011 | |
| 2400:ad20::/32 | 4.3B × /64 | APNIC | 21st Sept 2022 | |
| 2400:ad80::/32 | 4.3B × /64 | APNIC | 26th Feb 2014 | |
| 2400:ade0::/32 | 4.3B × /64 | APNIC | 24th Sept 2022 | |
| 2400:ae20::/32 | 4.3B × /64 | APNIC | 26th Sept 2022 | |
| 2400:aee0::/32 | 4.3B × /64 | APNIC | 27th Sept 2022 | |
| 2400:afc0::/32 | 4.3B × /64 | APNIC | 14th Feb 2017 |