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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,248 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2607:edc0::/32 | 4.3B × /64 | ARIN |  PR | 8th Jan 2025 |
| 2607:ef00::/32 | 4.3B × /64 | ARIN |  US | 6th Aug 2012 |
| 2607:ef80::/32 | 4.3B × /64 | ARIN |  CA | 16th Dec 2016 |
| 2607:f008::/32 | 4.3B × /64 | ARIN | US | 15th May 2007 |
| 2607:f048::/32 | 4.3B × /64 | ARIN | US | 29th May 2007 |
| 2607:f080::/32 | 4.3B × /64 | ARIN | US | 19th Jun 2007 |
| 2607:f090::/32 | 4.3B × /64 | ARIN | CA | 2nd Jul 2007 |
| 2607:f0a0::/32 | 4.3B × /64 | ARIN | US | 12th Jul 2007 |
| 2607:f0a8::/32 | 4.3B × /64 | ARIN | US | 17th Jul 2007 |
| 2607:f0e0::/32 | 4.3B × /64 | ARIN | US | 6th Aug 2007 |
| 2607:f0e8::/32 | 4.3B × /64 | ARIN | US | 8th Aug 2007 |
| 2607:f0f8::/32 | 4.3B × /64 | ARIN | US | 14th Aug 2007 |
| 2607:f138::/32 | 4.3B × /64 | ARIN | US | 11th Sept 2007 |
| 2607:f158::/32 | 4.3B × /64 | ARIN | US | 25th Sept 2007 |
| 2607:f168::/32 | 4.3B × /64 | ARIN | US | 26th Sept 2007 |
| 2607:f198::/32 | 4.3B × /64 | ARIN | US | 11th Oct 2007 |
| 2607:f1a0::/32 | 4.3B × /64 | ARIN | US | 11th Oct 2007 |
| 2607:f1b0::/32 | 4.3B × /64 | ARIN | US | 17th Oct 2007 |
| 2607:f1e8::/32 | 4.3B × /64 | ARIN | US | 25th Oct 2007 |
| 2607:f200::/32 | 4.3B × /64 | ARIN | US | 31st Oct 2007 |
| 2607:f228::/32 | 4.3B × /64 | ARIN | CA | 7th Nov 2007 |
| 2607:f230::/32 | 4.3B × /64 | ARIN | CA | 9th Nov 2007 |
| 2607:f240::/32 | 4.3B × /64 | ARIN | US | 14th Nov 2007 |
| 2607:f260::/32 | 4.3B × /64 | ARIN | US | 3rd Dec 2007 |
| 2607:f288::/32 | 4.3B × /64 | ARIN | US | 14th Dec 2007 |
| 2607:f2a8::/32 | 4.3B × /64 | ARIN | US | 4th Jan 2008 |
| 2607:f2b0::/32 | 4.3B × /64 | ARIN | US | 8th Jan 2008 |
| 2607:f310::/32 | 4.3B × /64 | ARIN | US | 7th Feb 2008 |
| 2607:f338::/32 | 4.3B × /64 | ARIN | CA | 26th Feb 2008 |
| 2607:f3b8::/32 | 4.3B × /64 | ARIN | US | 24th Mar 2008 |
| 2607:f40::/32 | 4.3B × /64 | ARIN | US | 2nd Dec 2022 |
| 2607:f420::/32 | 4.3B × /64 | ARIN | US | 26th Jan 2023 |
| 2607:f428::/32 | 4.3B × /64 | ARIN | US | 9th Apr 2008 |
| 2607:f458::/32 | 4.3B × /64 | ARIN | US | 25th Apr 2008 |
| 2607:f468::/32 | 4.3B × /64 | ARIN | US | 1st May 2008 |
| 2607:f480::/32 | 4.3B × /64 | ARIN | US | 1st May 2008 |
| 2607:f488::/32 | 4.3B × /64 | ARIN | US | 5th May 2008 |
| 2607:f4c8::/32 | 4.3B × /64 | ARIN | US | 20th May 2008 |
| 2607:f4e8::/32 | 4.3B × /64 | ARIN | US | 22nd May 2008 |
| 2607:f4f8::/32 | 4.3B × /64 | ARIN | US | 2nd Jun 2008 |
| 2607:f510::/32 | 4.3B × /64 | ARIN | US | 6th Jun 2008 |
| 2607:f540::/32 | 4.3B × /64 | ARIN | CA | 18th Jun 2008 |
| 2607:f548::/32 | 4.3B × /64 | ARIN | US | 18th Jun 2008 |
| 2607:f550::/32 | 4.3B × /64 | ARIN | US | 23rd Jun 2008 |
| 2607:f568::/32 | 4.3B × /64 | ARIN | US | 27th Jun 2008 |
| 2607:f5d0::/32 | 4.3B × /64 | ARIN | US | 12th Aug 2008 |
| 2607:f5f8::/32 | 4.3B × /64 | ARIN | US | 20th Aug 2008 |
| 2607:f608::/32 | 4.3B × /64 | ARIN | US | 22nd Aug 2008 |
| 2607:f618::/32 | 4.3B × /64 | ARIN | US | 25th Aug 2008 |
| 2607:f620::/32 | 4.3B × /64 | ARIN | US | 25th Aug 2008 |