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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with unannounced space registered through ARIN, largest first.
Unannounced blocks in United States
26,289 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2602:f7fa::/40 | 16.8M × /64 | ARIN |  US | 20th Sept 2024 |
| 2602:f7fd::/36 | 268M × /64 | ARIN | US | 17th Sept 2024 |
| 2602:f801::/36 | 268M × /64 | ARIN | US | 12th Sept 2024 |
| 2602:f807::/40 | 16.8M × /64 | ARIN | US | 9th Sept 2024 |
| 2602:f808::/40 | 16.8M × /64 | ARIN | US | 9th Sept 2024 |
| 2602:f809::/36 | 268M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80a::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80c::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80e::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80f::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f810::/40 | 16.8M × /64 | ARIN | US | 5th Sept 2024 |
| 2602:f811::/40 | 16.8M × /64 | ARIN | US | 5th Sept 2024 |
| 2602:f814::/36 | 268M × /64 | ARIN | US | 4th Sept 2024 |
| 2602:f817::/40 | 16.8M × /64 | ARIN | US | 3rd Sept 2024 |
| 2602:f818::/40 | 16.8M × /64 | ARIN | US | 3rd Sept 2024 |
| 2602:f819::/40 | 16.8M × /64 | ARIN | US | 3rd Sept 2024 |
| 2602:f81a::/40 | 16.8M × /64 | ARIN | US | 3rd Sept 2024 |
| 2602:f81b::/40 | 16.8M × /64 | ARIN | US | 3rd Sept 2024 |
| 2602:f81d::/40 | 16.8M × /64 | ARIN | US | 30th Aug 2024 |
| 2602:f81e::/40 | 16.8M × /64 | ARIN | US | 30th Aug 2024 |
| 2602:f81f::/40 | 16.8M × /64 | ARIN | US | 30th Aug 2024 |
| 2602:f820::/40 | 16.8M × /64 | ARIN | US | 30th Aug 2024 |
| 2602:f823::/40 | 16.8M × /64 | ARIN | US | 30th Aug 2024 |
| 2602:f82a::/40 | 16.8M × /64 | ARIN | US | 27th Aug 2024 |
| 2602:f82b::/40 | 16.8M × /64 | ARIN | US | 27th Aug 2024 |
| 2602:f82c::/40 | 16.8M × /64 | ARIN | US | 26th Aug 2024 |
| 2602:f82f::/36 | 268M × /64 | ARIN | US | 22nd Aug 2024 |
| 2602:f835::/36 | 268M × /64 | ARIN | US | 21st Aug 2024 |
| 2602:f837::/40 | 16.8M × /64 | ARIN | US | 20th Aug 2024 |
| 2602:f83e::/40 | 16.8M × /64 | ARIN | US | 15th Aug 2024 |
| 2602:f83f::/40 | 16.8M × /64 | ARIN | US | 15th Aug 2024 |
| 2602:f842::/36 | 268M × /64 | ARIN | US | 14th Aug 2024 |
| 2602:f848::/40 | 16.8M × /64 | ARIN | US | 13th Aug 2024 |
| 2602:f84b::/36 | 268M × /64 | ARIN | US | 9th Aug 2024 |
| 2602:f84c::/40 | 16.8M × /64 | ARIN | US | 8th Aug 2024 |
| 2602:f84d::/40 | 16.8M × /64 | ARIN | US | 8th Aug 2024 |
| 2602:f84f::/40 | 16.8M × /64 | ARIN | US | 6th Aug 2024 |
| 2602:f850::/40 | 16.8M × /64 | ARIN | US | 6th Aug 2024 |
| 2602:f851::/36 | 268M × /64 | ARIN | US | 5th Aug 2024 |
| 2602:f853::/40 | 16.8M × /64 | ARIN | US | 5th Aug 2024 |
| 2602:f854::/40 | 16.8M × /64 | ARIN | US | 2nd Aug 2024 |
| 2602:f858::/36 | 268M × /64 | ARIN | US | 1st Aug 2024 |
| 2602:f859::/40 | 16.8M × /64 | ARIN | US | 31st Jul 2024 |
| 2602:f85a::/44 | 1M × /64 | ARIN | US | 31st Jul 2024 |
| 2602:f862::/40 | 16.8M × /64 | ARIN | US | 29th Jul 2024 |
| 2602:f863::/40 | 16.8M × /64 | ARIN | US | 29th Jul 2024 |
| 2602:f867::/36 | 268M × /64 | ARIN | US | 26th Jul 2024 |
| 2602:f868::/36 | 268M × /64 | ARIN | US | 25th Jul 2024 |
| 2602:f86a::/40 | 16.8M × /64 | ARIN | US | 24th Jul 2024 |
| 2602:f86d::/40 | 16.8M × /64 | ARIN | US | 24th Jul 2024 |