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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,256 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2602:f91c::/36 | 268M × /64 | ARIN |  US | 17th Apr 2024 |
| 2602:f91d::/40 | 16.8M × /64 | ARIN |  NL | 15th Jan 2025 |
| 2602:f91f::/36 | 268M × /64 | ARIN | US | 11th Apr 2024 |
| 2602:f924::/36 | 268M × /64 | ARIN |  CA | 4th Apr 2024 |
| 2602:f926::/36 | 268M × /64 | ARIN | US | 3rd Apr 2024 |
| 2602:f928::/40 | 16.8M × /64 | ARIN | US | 3rd Apr 2024 |
| 2602:f929::/36 | 268M × /64 | ARIN | US | 2nd Apr 2024 |
| 2602:f92e::/40 | 16.8M × /64 | ARIN | US | 2nd Apr 2024 |
| 2602:f92f::/40 | 16.8M × /64 | ARIN | US | 1st Apr 2024 |
| 2602:f930::/40 | 16.8M × /64 | ARIN | US | 1st Apr 2024 |
| 2602:f932::/40 | 16.8M × /64 | ARIN | US | 28th Mar 2024 |
| 2602:f934::/36 | 268M × /64 | ARIN | US | 22nd Mar 2024 |
| 2602:f935::/40 | 16.8M × /64 | ARIN | US | 22nd Mar 2024 |
| 2602:f936::/40 | 16.8M × /64 | ARIN | US | 21st Mar 2024 |
| 2602:f93c::/36 | 268M × /64 | ARIN | US | 18th Mar 2024 |
| 2602:f93e::/40 | 16.8M × /64 | ARIN | US | 15th Mar 2024 |
| 2602:f93f::/36 | 268M × /64 | ARIN | US | 15th Mar 2024 |
| 2602:f940::/40 | 16.8M × /64 | ARIN | CA | 15th Mar 2024 |
| 2602:f941::/40 | 16.8M × /64 | ARIN | US | 15th Mar 2024 |
| 2602:f944::/36 | 268M × /64 | ARIN | US | 14th Mar 2024 |
| 2602:f945::/40 | 16.8M × /64 | ARIN | US | 13th Mar 2024 |
| 2602:f948::/40 | 16.8M × /64 | ARIN | US | 12th Mar 2024 |
| 2602:f94b::/40 | 16.8M × /64 | ARIN | US | 11th Mar 2024 |
| 2602:f94d::/40 | 16.8M × /64 | ARIN | US | 7th Mar 2024 |
| 2602:f94f::/36 | 268M × /64 | ARIN | CA | 7th Mar 2024 |
| 2602:f951::/40 | 16.8M × /64 | ARIN | US | 6th Mar 2024 |
| 2602:f952::/40 | 16.8M × /64 | ARIN | CA | 6th Mar 2024 |
| 2602:f955::/36 | 268M × /64 | ARIN | US | 4th Mar 2024 |
| 2602:f958::/36 | 268M × /64 | ARIN | CA | 4th Mar 2024 |
| 2602:f95e::/40 | 16.8M × /64 | ARIN | US | 28th Feb 2024 |
| 2602:f961::/40 | 16.8M × /64 | ARIN | US | 28th Feb 2024 |
| 2602:f963::/36 | 268M × /64 | ARIN | US | 27th Feb 2024 |
| 2602:f965::/40 | 16.8M × /64 | ARIN |  GD | 26th Feb 2024 |
| 2602:f966::/32 | 4.3B × /64 | ARIN | US | 26th Feb 2024 |
| 2602:f967::/40 | 16.8M × /64 | ARIN | US | 26th Feb 2024 |
| 2602:f96a::/40 | 16.8M × /64 | ARIN | CA | 22nd Feb 2024 |
| 2602:f96e::/40 | 16.8M × /64 | ARIN | US | 21st Feb 2024 |
| 2602:f970::/36 | 268M × /64 | ARIN | CA | 14th Feb 2024 |
| 2602:f985::/40 | 16.8M × /64 | ARIN | CA | 5th Feb 2024 |
| 2602:f986::/36 | 268M × /64 | ARIN | US | 5th Feb 2024 |
| 2602:f989::/40 | 16.8M × /64 | ARIN | US | 31st Jan 2024 |
| 2602:f98a::/40 | 16.8M × /64 | ARIN | US | 31st Jan 2024 |
| 2602:f98c::/36 | 268M × /64 | ARIN | US | 31st Jan 2024 |
| 2602:f990::/36 | 268M × /64 | ARIN | US | 30th Jan 2024 |
| 2602:f991::/36 | 268M × /64 | ARIN | US | 29th Jan 2024 |
| 2602:f998::/36 | 268M × /64 | ARIN | US | 23rd Jan 2024 |
| 2602:f999::/36 | 268M × /64 | ARIN | US | 23rd Jan 2024 |
| 2602:f99a::/40 | 16.8M × /64 | ARIN | US | 22nd Jan 2024 |
| 2602:f99e::/36 | 268M × /64 | ARIN | US | 16th Jan 2024 |
| 2602:f9a1::/36 | 268M × /64 | ARIN | US | 16th Jan 2024 |