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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,124 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a02:f0c0::/29 | 34.4B × /64 | RIPE NCC | 5th Dec 2012 | |
| 2a02:f100::/29 | 34.4B × /64 | RIPE NCC | 6th Dec 2012 | |
| 2a02:f140::/29 | 34.4B × /64 | RIPE NCC | 6th Dec 2012 | |
| 2a02:f240::/29 | 34.4B × /64 | RIPE NCC | 7th Jun 2018 | |
| 2a02:f280::/29 | 34.4B × /64 | RIPE NCC | 10th Dec 2012 | |
| 2a02:f440::/29 | 34.4B × /64 | RIPE NCC | 14th Jan 2026 | |
| 2a02:f500::/29 | 34.4B × /64 | RIPE NCC | 14th Dec 2012 | |
| 2a02:f50::/32 | 4.3B × /64 | RIPE NCC | 28th May 2009 | |
| 2a02:f580::/29 | 34.4B × /64 | RIPE NCC | 6th May 2025 | |
| 2a02:f60::/32 | 4.3B × /64 | RIPE NCC | 29th May 2009 | |
| 2a02:f680::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2023 | |
| 2a02:f6c0::/29 | 34.4B × /64 | RIPE NCC | 19th Dec 2012 | |
| 2a02:f700::/29 | 34.4B × /64 | RIPE NCC | 20th Dec 2012 | |
| 2a02:f740::/29 | 34.4B × /64 | RIPE NCC | 20th Dec 2012 | |
| 2a02:f80::/32 | 4.3B × /64 | RIPE NCC | 2nd Jun 2009 | |
| 2a02:f88::/32 | 4.3B × /64 | RIPE NCC | 3rd Jun 2009 | |
| 2a02:f900::/29 | 34.4B × /64 | RIPE NCC | 21st Dec 2012 | |
| 2a02:f940::/29 | 34.4B × /64 | RIPE NCC | 21st Dec 2012 | |
| 2a02:fa40::/29 | 34.4B × /64 | RIPE NCC | 2nd Jan 2013 | |
| 2a02:fb40::/29 | 34.4B × /64 | RIPE NCC | 16th Jan 2024 | |
| 2a02:fb80::/29 | 34.4B × /64 | RIPE NCC | 7th Jan 2013 | |
| 2a02:fbc0::/29 | 34.4B × /64 | RIPE NCC | 8th Jan 2013 | |
| 2a02:fc40::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2017 | |
| 2a02:fc80::/29 | 34.4B × /64 | RIPE NCC | 9th Jan 2013 | |
| 2a02:fd0::/32 | 4.3B × /64 | RIPE NCC | 10th Jun 2009 | |
| 2a02:fd40::/29 | 34.4B × /64 | RIPE NCC | 8th Jun 2026 | |
| 2a02:fd80::/29 | 34.4B × /64 | RIPE NCC | 11th Jan 2013 | |
| 2a02:fd8::/32 | 4.3B × /64 | RIPE NCC | 18th Aug 2010 | |
| 2a02:fdc0::/29 | 34.4B × /64 | RIPE NCC | 14th Jan 2013 | |
| 2a02:fe40::/29 | 34.4B × /64 | RIPE NCC | 14th Jan 2013 | |
| 2a02:fec0::/29 | 34.4B × /64 | RIPE NCC | 15th Jan 2013 | |
| 2a02:ff40::/29 | 34.4B × /64 | RIPE NCC | 16th Jan 2013 | |
| 2a02:ffc0::/29 | 34.4B × /64 | RIPE NCC | 6th Jan 2020 | |
| 2a03:1020::/32 | 4.3B × /64 | RIPE NCC | 15th Jul 2014 | |
| 2a03:1040::/32 | 4.3B × /64 | RIPE NCC | 10th Oct 2012 | |
| 2a03:1060::/32 | 4.3B × /64 | RIPE NCC | 15th Jul 2014 | |
| 2a03:1120::/32 | 4.3B × /64 | RIPE NCC | 15th Jul 2014 | |
| 2a03:1140::/32 | 4.3B × /64 | RIPE NCC | 10th Oct 2012 | |
| 2a03:1200::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2011 | |
| 2a03:1220::/32 | 4.3B × /64 | RIPE NCC | 16th Jul 2014 | |
| 2a03:1260::/32 | 4.3B × /64 | RIPE NCC | 16th Jul 2014 | |
| 2a03:12a0::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2015 | |
| 2a03:1320::/32 | 4.3B × /64 | RIPE NCC | 17th Jul 2014 | |
| 2a03:1340::/32 | 4.3B × /64 | RIPE NCC | 11th Oct 2012 | |
| 2a03:13e0::/32 | 4.3B × /64 | RIPE NCC | 18th Jul 2014 | |
| 2a03:140::/32 | 4.3B × /64 | RIPE NCC | 3rd Oct 2012 | |
| 2a03:1420::/32 | 4.3B × /64 | RIPE NCC | 21st Jul 2014 | |
| 2a03:1480::/32 | 4.3B × /64 | RIPE NCC | 17th Aug 2015 | |
| 2a03:14c0::/32 | 4.3B × /64 | RIPE NCC | 12th Oct 2012 | |
| 2a03:1560::/32 | 4.3B × /64 | RIPE NCC | 22nd Jul 2014 |