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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2620:13d:1000::/40 | 16.8M × /64 | ARIN | 19th Dec 2018 | |
| 2620:13d:3000::/44 | 1M × /64 | ARIN | 2nd Jan 2019 | |
| 2620:13d:5000::/44 | 1M × /64 | ARIN | 9th Jan 2019 | |
| 2620:13d:6000::/44 | 1M × /64 | ARIN | 10th Jan 2019 | |
| 2620:13d:7000::/40 | 16.8M × /64 | ARIN | 10th Jan 2019 | |
| 2620:13d:8000::/44 | 1M × /64 | ARIN | 22nd Jan 2019 | |
| 2620:13d:9000::/44 | 1M × /64 | ARIN | 23rd Jan 2019 | |
| 2620:13d:b000::/40 | 16.8M × /64 | ARIN | 29th Jan 2019 | |
| 2620:13e:1000::/44 | 1M × /64 | ARIN | 20th Feb 2019 | |
| 2620:13e:2000::/40 | 16.8M × /64 | ARIN | 26th Feb 2019 | |
| 2620:13e:4000::/44 | 1M × /64 | ARIN | 4th Mar 2019 | |
| 2620:13e:6000::/40 | 16.8M × /64 | ARIN | 11th Mar 2019 | |
| 2620:13e:8000::/44 | 1M × /64 | ARIN | 13th Mar 2019 | |
| 2620:13e:a000::/40 | 16.8M × /64 | ARIN | 21st Mar 2019 | |
| 2620:13e:b000::/44 | 1M × /64 | ARIN | 22nd Mar 2019 | |
| 2620:13e:c000::/44 | 1M × /64 | ARIN | 28th Mar 2019 | |
| 2620:13e:f000::/44 | 1M × /64 | ARIN | 8th Apr 2019 | |
| 2620:13f:1000::/44 | 1M × /64 | ARIN | 18th Apr 2019 | |
| 2620:13f:2000::/36 | 268M × /64 | ARIN | 18th Apr 2019 | |
| 2620:13f:3000::/40 | 16.8M × /64 | ARIN | 29th Apr 2019 | |
| 2620:13f:4000::/44 | 1M × /64 | ARIN | 2nd May 2019 | |
| 2620:13f:9000::/44 | 1M × /64 | ARIN | 21st May 2019 | |
| 2620:13f::/44 | 1M × /64 | ARIN | 15th Apr 2019 | |
| 2620:13f:b000::/44 | 1M × /64 | ARIN | 30th May 2019 | |
| 2620:13f:c000::/44 | 1M × /64 | ARIN | 30th May 2019 | |
| 2620:140::/38 | 67.1M × /64 | ARIN | 7th Sept 2010 | |
| 2620:141::/36 | 268M × /64 | ARIN | 21st Jan 2011 | |
| 2620:143::/37 | 134M × /64 | ARIN | 15th Feb 2011 | |
| 2620:144::/32 | 4.3B × /64 | ARIN | 23rd Mar 2011 | |
| 2620:146::/36 | 268M × /64 | ARIN | 14th Apr 2011 | |
| 2620:148::/36 | 268M × /64 | ARIN | 12th May 2011 | |
| 2620:14:2000::/48 | 65.5k × /64 | ARIN | 8th Feb 2017 | |
| 2620:14:4000::/48 | 65.5k × /64 | ARIN | 3rd Jan 2013 | |
| 2620:14:a000::/48 | 65.5k × /64 | ARIN | 17th Feb 2017 | |
| 2620:14:c000::/48 | 65.5k × /64 | ARIN | 9th Jan 2013 | |
| 2620:14b::/36 | 268M × /64 | ARIN | 4th May 2011 | |
| 2620:14c::/36 | 268M × /64 | ARIN | 20th Jun 2011 | |
| 2620:14e::/36 | 268M × /64 | ARIN | 5th Jul 2011 | |
| 2620:14f::/36 | 268M × /64 | ARIN | 11th Jul 2011 | |
| 2620:150::/36 | 268M × /64 | ARIN | 10th Aug 2011 | |
| 2620:152::/36 | 268M × /64 | ARIN | 29th Sept 2011 | |
| 2620:153::/36 | 268M × /64 | ARIN | 10th Oct 2011 | |
| 2620:156::/36 | 268M × /64 | ARIN | 19th Mar 2012 | |
| 2620:157::/36 | 268M × /64 | ARIN | 20th Mar 2012 | |
| 2620:159::/36 | 268M × /64 | ARIN | 17th Apr 2012 | |
| 2620:15:2000::/48 | 65.5k × /64 | ARIN | 24th Feb 2017 | |
| 2620:15:4000::/48 | 65.5k × /64 | ARIN | 16th Apr 2026 | |
| 2620:15:a000::/48 | 65.5k × /64 | ARIN | 1st Mar 2017 | |
| 2620:15:c000::/48 | 65.5k × /64 | ARIN | 11th Jan 2013 | |
| 2620:15a::/36 | 268M × /64 | ARIN | 23rd Apr 2012 |