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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2620:116:4000::/40 | 16.8M × /64 | ARIN | 25th Jun 2013 | |
| 2620:116:6000::/44 | 1M × /64 | ARIN | 3rd Jul 2013 | |
| 2620:116:7000::/44 | 1M × /64 | ARIN | 19th Jul 2013 | |
| 2620:116:9000::/40 | 16.8M × /64 | ARIN | 13th Aug 2013 | |
| 2620:116:a000::/40 | 16.8M × /64 | ARIN | 20th Aug 2013 | |
| 2620:116:b000::/40 | 16.8M × /64 | ARIN | 22nd Aug 2013 | |
| 2620:116:c000::/44 | 1M × /64 | ARIN | 26th Aug 2013 | |
| 2620:116:d000::/40 | 16.8M × /64 | ARIN | 28th Aug 2013 | |
| 2620:116:e000::/40 | 16.8M × /64 | ARIN | 5th Sept 2013 | |
| 2620:117:1000::/40 | 16.8M × /64 | ARIN | 18th Sept 2013 | |
| 2620:117:3000::/40 | 16.8M × /64 | ARIN | 11th Oct 2013 | |
| 2620:117:4000::/44 | 1M × /64 | ARIN | 22nd Oct 2013 | |
| 2620:117:6000::/40 | 16.8M × /64 | ARIN | 5th Nov 2013 | |
| 2620:117:7000::/40 | 16.8M × /64 | ARIN | 5th Nov 2013 | |
| 2620:117:8000::/40 | 16.8M × /64 | ARIN | 19th Nov 2013 | |
| 2620:117:a000::/40 | 16.8M × /64 | ARIN | 22nd Nov 2013 | |
| 2620:117:e000::/40 | 16.8M × /64 | ARIN | 6th Jan 2014 | |
| 2620:118:1000::/40 | 16.8M × /64 | ARIN | 29th Jan 2014 | |
| 2620:118:6000::/40 | 16.8M × /64 | ARIN | 18th Feb 2014 | |
| 2620:118:7000::/44 | 1M × /64 | ARIN | 21st Feb 2014 | |
| 2620:118:9000::/44 | 1M × /64 | ARIN | 28th Feb 2014 | |
| 2620:118:a000::/44 | 1M × /64 | ARIN | 4th Mar 2014 | |
| 2620:118:c000::/40 | 16.8M × /64 | ARIN | 6th Mar 2014 | |
| 2620:118:d000::/44 | 1M × /64 | ARIN | 12th Mar 2014 | |
| 2620:118:f000::/40 | 16.8M × /64 | ARIN | 4th Apr 2014 | |
| 2620:119:2000::/44 | 1M × /64 | ARIN | 2nd May 2014 | |
| 2620:119:3000::/40 | 16.8M × /64 | ARIN | 5th May 2014 | |
| 2620:119:6000::/44 | 1M × /64 | ARIN | 21st May 2014 | |
| 2620:119:7000::/40 | 16.8M × /64 | ARIN | 21st May 2014 | |
| 2620:119:8000::/44 | 1M × /64 | ARIN | 28th May 2014 | |
| 2620:119:9000::/40 | 16.8M × /64 | ARIN | 30th May 2014 | |
| 2620:119:a000::/44 | 1M × /64 | ARIN | 3rd Jun 2014 | |
| 2620:119:b000::/44 | 1M × /64 | ARIN | 3rd Jun 2014 | |
| 2620:119:c000::/44 | 1M × /64 | ARIN | 4th Jun 2014 | |
| 2620:119:d000::/40 | 16.8M × /64 | ARIN | 4th Jun 2014 | |
| 2620:11:4000::/48 | 65.5k × /64 | ARIN | 10th Jun 2013 | |
| 2620:11:6000::/48 | 65.5k × /64 | ARIN | 11th Jan 2017 | |
| 2620:11:8000::/48 | 65.5k × /64 | ARIN | 6th Jun 2025 | |
| 2620:11a:1000::/44 | 1M × /64 | ARIN | 11th Jun 2014 | |
| 2620:11a:3000::/40 | 16.8M × /64 | ARIN | 16th Jun 2014 | |
| 2620:11a:4000::/40 | 16.8M × /64 | ARIN | 16th Jun 2014 | |
| 2620:11a:7000::/44 | 1M × /64 | ARIN | 17th Jun 2014 | |
| 2620:11a:8000::/44 | 1M × /64 | ARIN | 19th Jun 2014 | |
| 2620:11a:9000::/44 | 1M × /64 | ARIN | 23rd Jun 2014 | |
| 2620:11a:e000::/44 | 1M × /64 | ARIN | 16th Jul 2014 | |
| 2620:11a:f000::/36 | 268M × /64 | ARIN | 18th Jul 2014 | |
| 2620:11b:1000::/40 | 16.8M × /64 | ARIN | 22nd Jul 2014 | |
| 2620:11b:2000::/40 | 16.8M × /64 | ARIN | 24th Jul 2014 | |
| 2620:11b:5000::/44 | 1M × /64 | ARIN | 25th Jul 2014 | |
| 2620:11b:6000::/44 | 1M × /64 | ARIN | 31st Jul 2014 |