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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,001 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a13:4200::/29 | 34.4B × /64 | RIPE NCC | 20th Jun 2022 | |
| 2a13:4240::/29 | 34.4B × /64 | RIPE NCC | 25th Nov 2022 | |
| 2a13:4280::/29 | 34.4B × /64 | RIPE NCC | 25th Aug 2022 | |
| 2a13:42c0::/29 | 34.4B × /64 | RIPE NCC | 17th Mar 2026 | |
| 2a13:4340::/29 | 34.4B × /64 | RIPE NCC | 25th Nov 2022 | |
| 2a13:4380::/29 | 34.4B × /64 | RIPE NCC | 25th Aug 2022 | |
| 2a13:43c0::/29 | 34.4B × /64 | RIPE NCC | 25th Nov 2022 | |
| 2a13:440::/29 | 34.4B × /64 | RIPE NCC | 13th Oct 2022 | |
| 2a13:4480::/29 | 34.4B × /64 | RIPE NCC | 17th Mar 2026 | |
| 2a13:44c0::/29 | 34.4B × /64 | RIPE NCC | 25th Nov 2022 | |
| 2a13:4500::/29 | 34.4B × /64 | RIPE NCC | 11th Jul 2022 | |
| 2a13:4580::/29 | 34.4B × /64 | RIPE NCC | 26th Aug 2022 | |
| 2a13:45c0::/29 | 34.4B × /64 | RIPE NCC | 28th Nov 2022 | |
| 2a13:4740::/29 | 34.4B × /64 | RIPE NCC | 28th Nov 2022 | |
| 2a13:4780::/29 | 34.4B × /64 | RIPE NCC | 29th Aug 2022 | |
| 2a13:4880::/29 | 34.4B × /64 | RIPE NCC | 30th Aug 2022 | |
| 2a13:4940::/29 | 34.4B × /64 | RIPE NCC | 30th Nov 2022 | |
| 2a13:4980::/29 | 34.4B × /64 | RIPE NCC | 30th Aug 2022 | |
| 2a13:4a00::/29 | 34.4B × /64 | RIPE NCC | 21st Jun 2022 | |
| 2a13:4b40::/29 | 34.4B × /64 | RIPE NCC | 1st Dec 2022 | |
| 2a13:4b80::/29 | 34.4B × /64 | RIPE NCC | 30th Aug 2022 | |
| 2a13:4bc0::/29 | 34.4B × /64 | RIPE NCC | 1st Dec 2022 | |
| 2a13:4cc0::/29 | 34.4B × /64 | RIPE NCC | 1st Dec 2022 | |
| 2a13:4d40::/29 | 34.4B × /64 | RIPE NCC | 1st Dec 2022 | |
| 2a13:4dc0::/29 | 34.4B × /64 | RIPE NCC | 2nd Dec 2022 | |
| 2a13:4e00::/29 | 34.4B × /64 | RIPE NCC | 6th Sept 2023 | |
| 2a13:4e40::/29 | 34.4B × /64 | RIPE NCC | 2nd Dec 2022 | |
| 2a13:4f80::/29 | 34.4B × /64 | RIPE NCC | 31st Aug 2022 | |
| 2a13:4fc0::/29 | 34.4B × /64 | RIPE NCC | 5th Dec 2022 | |
| 2a13:5000::/29 | 34.4B × /64 | RIPE NCC | 3rd Jun 2022 | |
| 2a13:5140::/29 | 34.4B × /64 | RIPE NCC | 5th Dec 2022 | |
| 2a13:5180::/29 | 34.4B × /64 | RIPE NCC | 2nd Sept 2022 | |
| 2a13:51c0::/29 | 34.4B × /64 | RIPE NCC | 5th Dec 2022 | |
| 2a13:52c0::/29 | 34.4B × /64 | RIPE NCC | 6th Dec 2022 | |
| 2a13:5340::/29 | 34.4B × /64 | RIPE NCC | 6th Dec 2022 | |
| 2a13:5380::/29 | 34.4B × /64 | RIPE NCC | 2nd Sept 2022 | |
| 2a13:53c0::/29 | 34.4B × /64 | RIPE NCC | 6th Dec 2022 | |
| 2a13:5440::/29 | 34.4B × /64 | RIPE NCC | 7th Dec 2022 | |
| 2a13:5500::/29 | 34.4B × /64 | RIPE NCC | 12th Jul 2022 | |
| 2a13:5540::/29 | 34.4B × /64 | RIPE NCC | 8th Dec 2022 | |
| 2a13:5600::/29 | 34.4B × /64 | RIPE NCC | 21st Jun 2022 | |
| 2a13:5880::/29 | 34.4B × /64 | RIPE NCC | 5th Sept 2022 | |
| 2a13:58c0::/29 | 34.4B × /64 | RIPE NCC | 9th Dec 2022 | |
| 2a13:5980::/29 | 34.4B × /64 | RIPE NCC | 6th Sept 2022 | |
| 2a13:5a80::/29 | 34.4B × /64 | RIPE NCC | 7th Sept 2022 | |
| 2a13:5ac0::/29 | 34.4B × /64 | RIPE NCC | 12th Dec 2022 | |
| 2a13:5b00::/32 | 4.3B × /64 | RIPE NCC | 12th Jul 2022 | |
| 2a13:5b40::/29 | 34.4B × /64 | RIPE NCC | 12th Dec 2022 | |
| 2a13:5bc0::/29 | 34.4B × /64 | RIPE NCC | 13th Dec 2022 | |
| 2a13:5c00::/29 | 34.4B × /64 | RIPE NCC | 10th Jun 2022 |