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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,248 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2620:64:6000::/48 | 65.5k × /64 | ARIN | 22nd Jan 2019 | |
| 2620:64:c000::/44 | 1M × /64 | ARIN | 19th Dec 2013 | |
| 2620:65:4080::/48 | 65.5k × /64 | ARIN | 5th May 2016 | |
| 2620:65:c000::/48 | 65.5k × /64 | ARIN | 23rd Dec 2013 | |
| 2620:66:2000::/48 | 65.5k × /64 | ARIN | 1st Feb 2019 | |
| 2620:66:8000::/48 | 65.5k × /64 | ARIN | 5th Jul 2011 | |
| 2620:66::/48 | 65.5k × /64 | ARIN | 12th Aug 2010 | |
| 2620:66:c000::/48 | 65.5k × /64 | ARIN | 26th Dec 2013 | |
| 2620:66:e000::/48 | 65.5k × /64 | ARIN | 8th Feb 2019 | |
| 2620:67:8000::/48 | 65.5k × /64 | ARIN | 3rd Jan 2013 | |
| 2620:67:e000::/48 | 65.5k × /64 | ARIN | 22nd Feb 2019 | |
| 2620:68:4000::/44 | 1M × /64 | ARIN | 2nd Jan 2014 | |
| 2620:68:6000::/48 | 65.5k × /64 | ARIN | 25th Feb 2019 | |
| 2620:68:8000::/48 | 65.5k × /64 | ARIN | 6th Jul 2011 | |
| 2620:68:c000::/44 | 1M × /64 | ARIN | 2nd Jan 2014 | |
| 2620:69:4000::/48 | 65.5k × /64 | ARIN | 2nd Jan 2014 | |
| 2620:69:8000::/48 | 65.5k × /64 | ARIN | 6th Jul 2011 | |
| 2620:69:a000::/48 | 65.5k × /64 | ARIN | 4th Mar 2019 | |
| 2620:69:e000::/48 | 65.5k × /64 | ARIN | 5th Mar 2019 | |
| 2620:6:4000::/48 | 65.5k × /64 | ARIN | 17th Aug 2012 | |
| 2620:6:6000::/48 | 65.5k × /64 | ARIN | 18th Aug 2016 | |
| 2620:6:8000::/48 | 65.5k × /64 | ARIN | 5th Apr 2011 | |
| 2620:6::/48 | 65.5k × /64 | ARIN | 7th Jun 2010 | |
| 2620:6:c000::/48 | 65.5k × /64 | ARIN | 23rd Aug 2012 | |
| 2620:6:e000::/48 | 65.5k × /64 | ARIN | 30th Aug 2016 | |
| 2620:6a:4000::/48 | 65.5k × /64 | ARIN | 21st Jan 2014 | |
| 2620:6a:8000::/48 | 65.5k × /64 | ARIN | 18th Jul 2011 | |
| 2620:6a:a000::/48 | 65.5k × /64 | ARIN | 8th Mar 2019 | |
| 2620:6a:e000::/48 | 65.5k × /64 | ARIN | 15th Mar 2019 | |
| 2620:6b:2000::/48 | 65.5k × /64 | ARIN | 18th Mar 2019 | |
| 2620:6b:6000::/48 | 65.5k × /64 | ARIN | 20th Mar 2019 | |
| 2620:6b:8000::/48 | 65.5k × /64 | ARIN | 20th Jul 2011 | |
| 2620:6b::/48 | 65.5k × /64 | ARIN | 8th Feb 2011 | |
| 2620:6b:a000::/48 | 65.5k × /64 | ARIN | 21st Mar 2019 | |
| 2620:6b:c000::/48 | 65.5k × /64 | ARIN | 5th Feb 2014 | |
| 2620:6b:e000::/48 | 65.5k × /64 | ARIN | 25th Mar 2019 | |
| 2620:6c:8080::/48 | 65.5k × /64 | ARIN | 13th Jul 2012 | |
| 2620:6c::/42 | 4.2M × /64 | ARIN | 4th May 2010 | |
| 2620:6c:c060::/48 | 65.5k × /64 | ARIN | 10th Mar 2016 | |
| 2620:6d:4020::/48 | 65.5k × /64 | ARIN | 14th Mar 2016 | |
| 2620:6d:40::/48 | 65.5k × /64 | ARIN | 30th May 2013 | |
| 2620:6d:8000::/48 | 65.5k × /64 | ARIN | 22nd Jul 2011 | |
| 2620:6d:a000::/48 | 65.5k × /64 | ARIN | 29th Mar 2019 | |
| 2620:6d:e000::/48 | 65.5k × /64 | ARIN | 3rd Apr 2019 | |
| 2620:6e:2000::/48 | 65.5k × /64 | ARIN | 3rd Apr 2019 | |
| 2620:6e:4000::/48 | 65.5k × /64 | ARIN | 13th Feb 2014 | |
| 2620:6e:8000::/44 | 1M × /64 | ARIN | 25th Jul 2011 | |
| 2620:6e::/48 | 65.5k × /64 | ARIN | 24th Aug 2010 | |
| 2620:6e:c000::/48 | 65.5k × /64 | ARIN | 21st Mar 2014 | |
| 2620:6e:e000::/48 | 65.5k × /64 | ARIN | 9th Apr 2019 |