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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,502 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2806:436::/32 | 4.3B × /64 | LACNIC |  MX | 6th Nov 2024 |
| 2806:43a::/32 | 4.3B × /64 | LACNIC | MX | 12th Nov 2024 |
| 2806:43b::/32 | 4.3B × /64 | LACNIC | MX | 30th Oct 2024 |
| 2806:441::/32 | 4.3B × /64 | LACNIC | MX | 24th Feb 2025 |
| 2806:442::/32 | 4.3B × /64 | LACNIC | MX | 21st Mar 2025 |
| 2806:443::/32 | 4.3B × /64 | LACNIC | MX | 10th Aug 2026 |
| 2806:446::/32 | 4.3B × /64 | LACNIC | MX | 8th Apr 2025 |
| 2806:448::/32 | 4.3B × /64 | LACNIC | MX | 16th Apr 2025 |
| 2806:44a::/32 | 4.3B × /64 | LACNIC | MX | 22nd May 2025 |
| 2806:44c::/32 | 4.3B × /64 | LACNIC | MX | 19th Jun 2025 |
| 2806:44e::/32 | 4.3B × /64 | LACNIC | MX | 15th Aug 2025 |
| 2806:453::/32 | 4.3B × /64 | LACNIC | MX | 19th Jan 2026 |
| 2806:455::/32 | 4.3B × /64 | LACNIC | MX | 26th Feb 2026 |
| 2806:45c::/32 | 4.3B × /64 | LACNIC | MX | 17th Mar 2026 |
| 2806:45d::/32 | 4.3B × /64 | LACNIC | MX | 22nd Jul 2026 |
| 2806:463::/32 | 4.3B × /64 | LACNIC | MX | 16th Apr 2026 |
| 2806:465::/32 | 4.3B × /64 | LACNIC | MX | 21st Apr 2026 |
| 2806:466::/32 | 4.3B × /64 | LACNIC | MX | 30th Apr 2026 |
| 2806:468::/32 | 4.3B × /64 | LACNIC | MX | 9th Jun 2026 |
| 2806:46a::/32 | 4.3B × /64 | LACNIC | MX | 22nd Jul 2026 |
| 2806:46b::/32 | 4.3B × /64 | LACNIC | MX | 17th Jul 2026 |
| 2806:46c::/32 | 4.3B × /64 | LACNIC | MX | 17th Jul 2026 |
| 2806:46d::/32 | 4.3B × /64 | LACNIC | MX | 10th Aug 2026 |
| 2806:46e::/32 | 4.3B × /64 | LACNIC | MX | 28th Jul 2026 |
| 2806:46f::/32 | 4.3B × /64 | LACNIC | MX | 28th Jul 2026 |
| 2806:471::/32 | 4.3B × /64 | LACNIC | MX | 28th Jul 2026 |
| 2806:472::/32 | 4.3B × /64 | LACNIC | MX | 10th Aug 2026 |
| 2806:478::/32 | 4.3B × /64 | LACNIC | MX | 17th Aug 2026 |
| 2806:47b::/32 | 4.3B × /64 | LACNIC | MX | 17th Aug 2026 |
| 2806:47c::/32 | 4.3B × /64 | LACNIC | MX | 25th Aug 2026 |
| 2806:47d::/32 | 4.3B × /64 | LACNIC | MX | 19th Aug 2026 |
| 2806:47f::/32 | 4.3B × /64 | LACNIC | MX | 28th Sept 2026 |
| 2806:480::/32 | 4.3B × /64 | LACNIC | MX | 4th Sept 2026 |
| 2806:481::/32 | 4.3B × /64 | LACNIC | MX | 29th Sept 2026 |
| 2806:484::/32 | 4.3B × /64 | LACNIC | MX | 28th Oct 2026 |
| 2806:486::/32 | 4.3B × /64 | LACNIC | MX | 16th Oct 2026 |
| 2806:488::/32 | 4.3B × /64 | LACNIC | MX | 23rd Oct 2026 |
| 2806:489::/32 | 4.3B × /64 | LACNIC | MX | 7th Oct 2026 |
| 2806:48a::/32 | 4.3B × /64 | LACNIC | MX | 16th Oct 2026 |
| 2806:48c::/32 | 4.3B × /64 | LACNIC | MX | 21st Oct 2026 |
| 2806:48e::/32 | 4.3B × /64 | LACNIC | MX | 16th Oct 2026 |
| 2a00:1000::/32 | 4.3B × /64 | RIPE NCC |  DE | 17th Jun 2009 |
| 2a00:1040::/32 | 4.3B × /64 | RIPE NCC |  DK | 29th Sept 2009 |
| 2a00:1048::/32 | 4.3B × /64 | RIPE NCC |  NL | 24th Jun 2009 |
| 2a00:1060::/32 | 4.3B × /64 | RIPE NCC |  MT | 26th Jun 2009 |
| 2a00:1070::/32 | 4.3B × /64 | RIPE NCC |  GB | 29th Jun 2009 |
| 2a00:1078::/32 | 4.3B × /64 | RIPE NCC |  RU | 30th Jun 2009 |
| 2a00:1088::/32 | 4.3B × /64 | RIPE NCC |  IT | 2nd Jul 2009 |
| 2a00:10c8::/32 | 4.3B × /64 | RIPE NCC | IT | 9th Jul 2009 |
| 2a00:10da::/31 | 8.6B × /64 | RIPE NCC |  SK | 10th Jul 2009 |