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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,124 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a02:c4c::/30 | 17.2B × /64 | RIPE NCC | 26th Mar 2009 | |
| 2a02:c680::/31 | 8.6B × /64 | RIPE NCC | 24th Sept 2012 | |
| 2a02:c690::/31 | 8.6B × /64 | RIPE NCC | 26th Jun 2015 | |
| 2a02:c700::/29 | 34.4B × /64 | RIPE NCC | 25th Sept 2012 | |
| 2a02:c780::/29 | 34.4B × /64 | RIPE NCC | 25th Sept 2012 | |
| 2a02:c7c0::/29 | 34.4B × /64 | RIPE NCC | 25th Sept 2012 | |
| 2a02:c800::/29 | 34.4B × /64 | RIPE NCC | 8th Jul 2015 | |
| 2a02:c8c0::/29 | 34.4B × /64 | RIPE NCC | 26th Sept 2012 | |
| 2a02:c940::/29 | 34.4B × /64 | RIPE NCC | 27th Sept 2012 | |
| 2a02:c980::/29 | 34.4B × /64 | RIPE NCC | 27th Sept 2012 | |
| 2a02:c9c0::/29 | 34.4B × /64 | RIPE NCC | 27th Sept 2012 | |
| 2a02:ca40::/29 | 34.4B × /64 | RIPE NCC | 1st Oct 2012 | |
| 2a02:ca80::/29 | 34.4B × /64 | RIPE NCC | 1st Oct 2012 | |
| 2a02:ca8::/32 | 4.3B × /64 | RIPE NCC | 6th Apr 2009 | |
| 2a02:cac0::/29 | 34.4B × /64 | RIPE NCC | 1st Oct 2012 | |
| 2a02:cbc0::/30 | 17.2B × /64 | RIPE NCC | 2nd Oct 2012 | |
| 2a02:cc00::/29 | 34.4B × /64 | RIPE NCC | 21st Feb 2019 | |
| 2a02:cc80::/29 | 34.4B × /64 | RIPE NCC | 1st May 2025 | |
| 2a02:ccc0::/29 | 34.4B × /64 | RIPE NCC | 3rd Oct 2012 | |
| 2a02:cd40::/29 | 34.4B × /64 | RIPE NCC | 4th Oct 2012 | |
| 2a02:cd80::/29 | 34.4B × /64 | RIPE NCC | 4th Oct 2012 | |
| 2a02:cf00::/29 | 34.4B × /64 | RIPE NCC | 8th Oct 2012 | |
| 2a02:d000::/29 | 34.4B × /64 | RIPE NCC | 9th Oct 2012 | |
| 2a02:d040::/29 | 34.4B × /64 | RIPE NCC | 9th Oct 2012 | |
| 2a02:d080::/29 | 34.4B × /64 | RIPE NCC | 9th Oct 2012 | |
| 2a02:d0::/32 | 4.3B × /64 | RIPE NCC | 27th Feb 2008 | |
| 2a02:d200::/29 | 34.4B × /64 | RIPE NCC | 12th Oct 2012 | |
| 2a02:d2c0::/29 | 34.4B × /64 | RIPE NCC | 16th Oct 2012 | |
| 2a02:d30::/32 | 4.3B × /64 | RIPE NCC | 15th Apr 2009 | |
| 2a02:d340::/29 | 34.4B × /64 | RIPE NCC | 17th Oct 2012 | |
| 2a02:d380::/29 | 34.4B × /64 | RIPE NCC | 17th Oct 2012 | |
| 2a02:d440::/29 | 34.4B × /64 | RIPE NCC | 17th Oct 2012 | |
| 2a02:d4c0::/30 | 17.2B × /64 | RIPE NCC | 18th Oct 2012 | |
| 2a02:d4e0::/30 | 17.2B × /64 | RIPE NCC | 22nd Oct 2012 | |
| 2a02:d50::/32 | 4.3B × /64 | RIPE NCC | 20th Apr 2009 | |
| 2a02:d540::/29 | 34.4B × /64 | RIPE NCC | 15th Jun 2026 | |
| 2a02:d580::/29 | 34.4B × /64 | RIPE NCC | 19th Oct 2012 | |
| 2a02:d640::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2012 | |
| 2a02:d680::/30 | 17.2B × /64 | RIPE NCC | 23rd Oct 2012 | |
| 2a02:d780::/29 | 34.4B × /64 | RIPE NCC | 24th Oct 2012 | |
| 2a02:d7c0::/29 | 34.4B × /64 | RIPE NCC | 24th Oct 2012 | |
| 2a02:d800::/29 | 34.4B × /64 | RIPE NCC | 13th Aug 2019 | |
| 2a02:d80::/29 | 34.4B × /64 | RIPE NCC | 21st Apr 2009 | |
| 2a02:d840::/29 | 34.4B × /64 | RIPE NCC | 26th Oct 2012 | |
| 2a02:d900::/29 | 34.4B × /64 | RIPE NCC | 26th Oct 2012 | |
| 2a02:d940::/29 | 34.4B × /64 | RIPE NCC | 26th Oct 2012 | |
| 2a02:d980::/29 | 34.4B × /64 | RIPE NCC | 29th Oct 2012 | |
| 2a02:d9c0::/29 | 34.4B × /64 | RIPE NCC | 30th Oct 2012 | |
| 2a02:da00::/29 | 34.4B × /64 | RIPE NCC | 30th Oct 2012 | |
| 2a02:da40::/29 | 34.4B × /64 | RIPE NCC | 30th Oct 2012 |