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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2620:106:d000::/40 | 16.8M × /64 | ARIN | 26th Aug 2011 | |
| 2620:107:2000::/44 | 1M × /64 | ARIN | 13th Sept 2011 | |
| 2620:107:5000::/40 | 16.8M × /64 | ARIN | 19th Sept 2011 | |
| 2620:107:6000::/44 | 1M × /64 | ARIN | 19th Sept 2011 | |
| 2620:107:7000::/44 | 1M × /64 | ARIN | 22nd Sept 2011 | |
| 2620:107:8000::/40 | 16.8M × /64 | ARIN | 26th Sept 2011 | |
| 2620:107:c000::/44 | 1M × /64 | ARIN | 26th Sept 2011 | |
| 2620:107:d000::/44 | 1M × /64 | ARIN | 3rd Oct 2011 | |
| 2620:107:e000::/40 | 16.8M × /64 | ARIN | 3rd Oct 2011 | |
| 2620:108:2000::/44 | 1M × /64 | ARIN | 14th Oct 2011 | |
| 2620:108:3000::/44 | 1M × /64 | ARIN | 17th Oct 2011 | |
| 2620:108:5000::/44 | 1M × /64 | ARIN | 18th Oct 2011 | |
| 2620:108:6000::/36 | 268M × /64 | ARIN | 1st Nov 2011 | |
| 2620:108::/40 | 16.8M × /64 | ARIN | 4th Oct 2011 | |
| 2620:108:b000::/44 | 1M × /64 | ARIN | 22nd Nov 2011 | |
| 2620:108:c000::/40 | 16.8M × /64 | ARIN | 22nd Nov 2011 | |
| 2620:108:e000::/44 | 1M × /64 | ARIN | 28th Nov 2011 | |
| 2620:108:f000::/44 | 1M × /64 | ARIN | 29th Nov 2011 | |
| 2620:109:1000::/40 | 16.8M × /64 | ARIN | 1st Dec 2011 | |
| 2620:109:2000::/44 | 1M × /64 | ARIN | 9th Dec 2011 | |
| 2620:109:3000::/44 | 1M × /64 | ARIN | 12th Dec 2011 | |
| 2620:109:4000::/40 | 16.8M × /64 | ARIN | 19th Dec 2011 | |
| 2620:109:5000::/44 | 1M × /64 | ARIN | 20th Dec 2011 | |
| 2620:109:7000::/40 | 16.8M × /64 | ARIN | 30th Dec 2011 | |
| 2620:109:9000::/40 | 16.8M × /64 | ARIN | 6th Jan 2012 | |
| 2620:109::/40 | 16.8M × /64 | ARIN | 1st Dec 2011 | |
| 2620:109:d000::/44 | 1M × /64 | ARIN | 13th Jan 2012 | |
| 2620:109:e000::/40 | 16.8M × /64 | ARIN | 13th Jan 2012 | |
| 2620:109:f000::/44 | 1M × /64 | ARIN | 18th Jan 2012 | |
| 2620:10:2000::/48 | 65.5k × /64 | ARIN | 27th Dec 2016 | |
| 2620:10:4000::/48 | 65.5k × /64 | ARIN | 3rd Dec 2012 | |
| 2620:10:6000::/48 | 65.5k × /64 | ARIN | 29th Dec 2016 | |
| 2620:10:a000::/48 | 65.5k × /64 | ARIN | 3rd Jan 2017 | |
| 2620:10:c000::/48 | 65.5k × /64 | ARIN | 4th Dec 2012 | |
| 2620:10:e000::/48 | 65.5k × /64 | ARIN | 6th Jan 2017 | |
| 2620:10a:1000::/44 | 1M × /64 | ARIN | 18th Jan 2012 | |
| 2620:10a:2000::/44 | 1M × /64 | ARIN | 19th Jan 2012 | |
| 2620:10a:3000::/40 | 16.8M × /64 | ARIN | 19th Jan 2012 | |
| 2620:10a:5000::/40 | 16.8M × /64 | ARIN | 20th Jan 2012 | |
| 2620:10a:9000::/40 | 16.8M × /64 | ARIN | 30th Jan 2012 | |
| 2620:10a:c000::/44 | 1M × /64 | ARIN | 7th Jul 2026 | |
| 2620:10a:d000::/44 | 1M × /64 | ARIN | 10th Feb 2012 | |
| 2620:10a:f000::/40 | 16.8M × /64 | ARIN | 16th Feb 2012 | |
| 2620:10b:1000::/40 | 16.8M × /64 | ARIN | 28th Feb 2012 | |
| 2620:10b:3000::/40 | 16.8M × /64 | ARIN | 29th Feb 2012 | |
| 2620:10b:5000::/44 | 1M × /64 | ARIN | 7th Mar 2012 | |
| 2620:10b:6000::/40 | 16.8M × /64 | ARIN | 8th Mar 2012 | |
| 2620:10b:9000::/44 | 1M × /64 | ARIN | 21st Mar 2012 | |
| 2620:10b::/44 | 1M × /64 | ARIN | 27th Feb 2012 | |
| 2620:10b:a000::/44 | 1M × /64 | ARIN | 26th Mar 2012 |