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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,256 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2602:fb97::/36 | 268M × /64 | ARIN | 30th Mar 2022 | |
| 2602:fb9b::/36 | 268M × /64 | ARIN | 25th Mar 2022 | |
| 2602:fba0::/36 | 268M × /64 | ARIN | 18th Mar 2022 | |
| 2602:fba5::/40 | 16.8M × /64 | ARIN | 16th Mar 2022 | |
| 2602:fba6::/36 | 268M × /64 | ARIN | 15th Mar 2022 | |
| 2602:fbaa::/36 | 268M × /64 | ARIN | 11th Mar 2022 | |
| 2602:fbb2::/36 | 268M × /64 | ARIN | 7th Mar 2022 | |
| 2602:fbb6::/36 | 268M × /64 | ARIN | 3rd Mar 2022 | |
| 2602:fbb8::/36 | 268M × /64 | ARIN | 25th Feb 2022 | |
| 2602:fbb9::/36 | 268M × /64 | ARIN | 24th Feb 2022 | |
| 2602:fbba::/40 | 16.8M × /64 | ARIN | 24th Feb 2022 | |
| 2602:fbbd::/36 | 268M × /64 | ARIN | 22nd Feb 2022 | |
| 2602:fbc3::/36 | 268M × /64 | ARIN | 22nd Feb 2022 | |
| 2602:fbc4::/36 | 268M × /64 | ARIN | 22nd Feb 2022 | |
| 2602:fbc7::/36 | 268M × /64 | ARIN | 15th Feb 2022 | |
| 2602:fbc9::/36 | 268M × /64 | ARIN | 11th Feb 2022 | |
| 2602:fbca::/36 | 268M × /64 | ARIN | 8th Feb 2022 | |
| 2602:fbcd::/36 | 268M × /64 | ARIN | 8th Feb 2022 | |
| 2602:fbd1::/36 | 268M × /64 | ARIN | 31st Jan 2022 | |
| 2602:fbd3::/40 | 16.8M × /64 | ARIN | 25th Jan 2022 | |
| 2602:fbd7::/36 | 268M × /64 | ARIN | 24th Jan 2022 | |
| 2602:fbdc::/40 | 16.8M × /64 | ARIN | 18th Jan 2022 | |
| 2602:fbdd::/36 | 268M × /64 | ARIN | 13th Jan 2022 | |
| 2602:fbdf::/36 | 268M × /64 | ARIN | 13th Jan 2022 | |
| 2602:fbe3::/36 | 268M × /64 | ARIN | 11th Jan 2022 | |
| 2602:fbe4::/36 | 268M × /64 | ARIN | 11th Jan 2022 | |
| 2602:fbe6::/36 | 268M × /64 | ARIN | 11th Jan 2022 | |
| 2602:fbe9::/36 | 268M × /64 | ARIN | 7th Jan 2022 | |
| 2602:fbeb::/36 | 268M × /64 | ARIN | 5th Jan 2022 | |
| 2602:fbed::/32 | 4.3B × /64 | ARIN | 3rd Jan 2022 | |
| 2602:fbf2::/36 | 268M × /64 | ARIN | 17th Dec 2021 | |
| 2602:fbf3::/40 | 16.8M × /64 | ARIN | 17th Dec 2021 | |
| 2602:fbf6::/40 | 16.8M × /64 | ARIN | 15th May 2026 | |
| 2602:fbf7::/36 | 268M × /64 | ARIN | 8th Dec 2021 | |
| 2602:fbfb::/36 | 268M × /64 | ARIN | 6th Dec 2021 | |
| 2602:fbfc::/36 | 268M × /64 | ARIN | 6th Dec 2021 | |
| 2602:fbfd::/36 | 268M × /64 | ARIN | 3rd Dec 2021 | |
| 2602:fc00::/36 | 268M × /64 | ARIN | 2nd Dec 2021 | |
| 2602:fc01::/36 | 268M × /64 | ARIN | 2nd Dec 2021 | |
| 2602:fc04::/36 | 268M × /64 | ARIN | 22nd Nov 2021 | |
| 2602:fc08::/36 | 268M × /64 | ARIN | 8th Nov 2021 | |
| 2602:fc0a::/36 | 268M × /64 | ARIN | 4th Nov 2021 | |
| 2602:fc0b::/40 | 16.8M × /64 | ARIN | 4th Nov 2021 | |
| 2602:fc0c::/36 | 268M × /64 | ARIN | 4th Nov 2021 | |
| 2602:fc11::/36 | 268M × /64 | ARIN | 21st Oct 2021 | |
| 2602:fc12::/36 | 268M × /64 | ARIN | 19th Oct 2021 | |
| 2602:fc14::/36 | 268M × /64 | ARIN | 13th Oct 2021 | |
| 2602:fc17::/36 | 268M × /64 | ARIN | 11th Oct 2021 | |
| 2602:fc18::/36 | 268M × /64 | ARIN | 11th Oct 2021 | |
| 2602:fc1a::/36 | 268M × /64 | ARIN | 7th Oct 2021 |