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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2a13:2680::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2022 | |
| 2a13:26c0::/29 | 34.4B × /64 | RIPE NCC | 10th Nov 2022 | |
| 2a13:2700::/29 | 34.4B × /64 | RIPE NCC | 4th Jul 2022 | |
| 2a13:2740::/29 | 34.4B × /64 | RIPE NCC | 10th Nov 2022 | |
| 2a13:280::/29 | 34.4B × /64 | RIPE NCC | 5th Jun 2023 | |
| 2a13:28c0::/29 | 34.4B × /64 | RIPE NCC | 13th Mar 2026 | |
| 2a13:2a80::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2022 | |
| 2a13:2ac0::/29 | 34.4B × /64 | RIPE NCC | 11th Nov 2022 | |
| 2a13:2b00::/29 | 34.4B × /64 | RIPE NCC | 4th Jul 2022 | |
| 2a13:2b80::/29 | 34.4B × /64 | RIPE NCC | 18th Aug 2022 | |
| 2a13:2d00::/29 | 34.4B × /64 | RIPE NCC | 4th Jul 2022 | |
| 2a13:2d80::/29 | 34.4B × /64 | RIPE NCC | 18th Aug 2022 | |
| 2a13:2e80::/29 | 34.4B × /64 | RIPE NCC | 18th Aug 2022 | |
| 2a13:2f00::/29 | 34.4B × /64 | RIPE NCC | 5th Jul 2022 | |
| 2a13:2f80::/29 | 34.4B × /64 | RIPE NCC | 19th Aug 2022 | |
| 2a13:300::/29 | 34.4B × /64 | RIPE NCC | 27th Jun 2022 | |
| 2a13:30c0::/29 | 34.4B × /64 | RIPE NCC | 14th Nov 2022 | |
| 2a13:3100::/32 | 4.3B × /64 | RIPE NCC | 5th Jul 2022 | |
| 2a13:3180::/29 | 34.4B × /64 | RIPE NCC | 19th Aug 2022 | |
| 2a13:3200::/29 | 34.4B × /64 | RIPE NCC | 17th Jun 2022 | |
| 2a13:3280::/29 | 34.4B × /64 | RIPE NCC | 13th Mar 2026 | |
| 2a13:340::/29 | 34.4B × /64 | RIPE NCC | 12th Oct 2022 | |
| 2a13:3580::/29 | 34.4B × /64 | RIPE NCC | 16th Mar 2026 | |
| 2a13:35c0::/29 | 34.4B × /64 | RIPE NCC | 15th Nov 2022 | |
| 2a13:3740::/29 | 34.4B × /64 | RIPE NCC | 16th Nov 2022 | |
| 2a13:37c0::/29 | 34.4B × /64 | RIPE NCC | 16th Nov 2022 | |
| 2a13:3800::/29 | 34.4B × /64 | RIPE NCC | 7th Jun 2022 | |
| 2a13:380::/29 | 34.4B × /64 | RIPE NCC | 3rd Aug 2022 | |
| 2a13:3900::/29 | 34.4B × /64 | RIPE NCC | 6th Jul 2022 | |
| 2a13:3940::/29 | 34.4B × /64 | RIPE NCC | 18th Nov 2022 | |
| 2a13:39c0::/32 | 4.3B × /64 | RIPE NCC | 21st Nov 2022 | |
| 2a13:3a00::/29 | 34.4B × /64 | RIPE NCC | 17th Jun 2022 | |
| 2a13:3a40::/29 | 34.4B × /64 | RIPE NCC | 21st Nov 2022 | |
| 2a13:3b40::/29 | 34.4B × /64 | RIPE NCC | 21st Nov 2022 | |
| 2a13:3b80::/29 | 34.4B × /64 | RIPE NCC | 24th Aug 2022 | |
| 2a13:3bc0::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2022 | |
| 2a13:3c00::/29 | 34.4B × /64 | RIPE NCC | 9th Jun 2022 | |
| 2a13:3c40::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2022 | |
| 2a13:3c80::/29 | 34.4B × /64 | RIPE NCC | 24th Aug 2022 | |
| 2a13:3e00::/32 | 4.3B × /64 | RIPE NCC | 20th Jun 2022 | |
| 2a13:3e40::/29 | 34.4B × /64 | RIPE NCC | 23rd Nov 2022 | |
| 2a13:3f00::/32 | 4.3B × /64 | RIPE NCC | 8th Jul 2022 | |
| 2a13:3f40::/29 | 34.4B × /64 | RIPE NCC | 24th Nov 2022 | |
| 2a13:3fc0::/29 | 34.4B × /64 | RIPE NCC | 24th Nov 2022 | |
| 2a13:4000::/29 | 34.4B × /64 | RIPE NCC | 2nd Jun 2022 | |
| 2a13:4040::/29 | 34.4B × /64 | RIPE NCC | 24th Nov 2022 | |
| 2a13:4080::/29 | 34.4B × /64 | RIPE NCC | 25th Aug 2022 | |
| 2a13:4100::/29 | 34.4B × /64 | RIPE NCC | 8th Jul 2022 | |
| 2a13:4140::/29 | 34.4B × /64 | RIPE NCC | 24th Nov 2022 | |
| 2a13:4180::/29 | 34.4B × /64 | RIPE NCC | 25th Aug 2022 |