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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,195 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a00:99c0::/32 | 4.3B × /64 | RIPE NCC |  ES | 14th Feb 2012 |
| 2a00:99e0::/29 | 34.4B × /64 | RIPE NCC |  DE | 6th Jun 2013 |
| 2a00:9aa0::/32 | 4.3B × /64 | RIPE NCC |  AE | 6th Jun 2013 |
| 2a00:9b20::/32 | 4.3B × /64 | RIPE NCC |  IR | 15th May 2015 |
| 2a00:9b40::/32 | 4.3B × /64 | RIPE NCC |  EE | 15th Jul 2016 |
| 2a00:9ba0::/32 | 4.3B × /64 | RIPE NCC |  GB | 10th Jun 2013 |
| 2a00:9bc0::/32 | 4.3B × /64 | RIPE NCC |  TR | 16th Feb 2012 |
| 2a00:9be0::/32 | 4.3B × /64 | RIPE NCC |  AL | 10th Jun 2013 |
| 2a00:9ca0::/32 | 4.3B × /64 | RIPE NCC |  IT | 11th Jun 2013 |
| 2a00:9cc0::/32 | 4.3B × /64 | RIPE NCC |  NL | 17th Feb 2012 |
| 2a00:9d00::/32 | 4.3B × /64 | RIPE NCC | DE | 16th Feb 2011 |
| 2a00:9d60::/32 | 4.3B × /64 | RIPE NCC | GB | 11th Jun 2013 |
| 2a00:9da0::/32 | 4.3B × /64 | RIPE NCC | GB | 19th May 2015 |
| 2a00:9dc0::/32 | 4.3B × /64 | RIPE NCC |  PL | 17th Feb 2012 |
| 2a00:9e40::/32 | 4.3B × /64 | RIPE NCC | GB | 17th Feb 2012 |
| 2a00:9ec0::/32 | 4.3B × /64 | RIPE NCC | EE | 17th Feb 2012 |
| 2a00:9f20::/32 | 4.3B × /64 | RIPE NCC | TR | 13th Jun 2013 |
| 2a00:9f60::/32 | 4.3B × /64 | RIPE NCC |  IL | 14th Jun 2013 |
| 2a00:9f80::/32 | 4.3B × /64 | RIPE NCC | EE | 17th May 2011 |
| 2a00:9fa0::/29 | 34.4B × /64 | RIPE NCC | DE | 14th Jun 2013 |
| 2a00:9fc0::/32 | 4.3B × /64 | RIPE NCC |  CZ | 20th Feb 2012 |
| 2a00:a020::/32 | 4.3B × /64 | RIPE NCC | DE | 14th Jun 2013 |
| 2a00:a060::/32 | 4.3B × /64 | RIPE NCC | GB | 17th Jun 2013 |
| 2a00:a100::/32 | 4.3B × /64 | RIPE NCC |  HU | 16th Feb 2011 |
| 2a00:a120::/32 | 4.3B × /64 | RIPE NCC |  FR | 17th Jun 2013 |
| 2a00:a180::/32 | 4.3B × /64 | RIPE NCC | DE | 17th May 2011 |
| 2a00:a1a0::/32 | 4.3B × /64 | RIPE NCC | HU | 18th Jun 2013 |
| 2a00:a1e0::/32 | 4.3B × /64 | RIPE NCC | GB | 18th Jun 2013 |
| 2a00:a240::/29 | 34.4B × /64 | RIPE NCC |  NO | 21st Feb 2012 |
| 2a00:a260::/32 | 4.3B × /64 | RIPE NCC | AL | 18th Jun 2013 |
| 2a00:a280::/32 | 4.3B × /64 | RIPE NCC | GB | 17th May 2011 |
| 2a00:a2c0::/32 | 4.3B × /64 | RIPE NCC | GB | 21st Feb 2012 |
| 2a00:a2e0::/32 | 4.3B × /64 | RIPE NCC |  US | 19th Jun 2013 |
| 2a00:a340::/32 | 4.3B × /64 | RIPE NCC | ES | 22nd Feb 2012 |
| 2a00:a3a0::/32 | 4.3B × /64 | RIPE NCC | ES | 20th Jun 2013 |
| 2a00:a3e0::/32 | 4.3B × /64 | RIPE NCC | IT | 20th Jun 2013 |
| 2a00:a440::/32 | 4.3B × /64 | RIPE NCC | TR | 23rd Feb 2012 |
| 2a00:a460::/32 | 4.3B × /64 | RIPE NCC |  AT | 21st Jun 2013 |
| 2a00:a4a0::/32 | 4.3B × /64 | RIPE NCC | FR | 21st Jun 2013 |
| 2a00:a4e0::/32 | 4.3B × /64 | RIPE NCC | GB | 21st Jun 2013 |
| 2a00:a560::/32 | 4.3B × /64 | RIPE NCC | PL | 24th Jun 2013 |
| 2a00:a5c0::/32 | 4.3B × /64 | RIPE NCC | NL | 24th Feb 2012 |
| 2a00:a5e0::/32 | 4.3B × /64 | RIPE NCC |  RU | 24th Jun 2013 |
| 2a00:a6c0::/32 | 4.3B × /64 | RIPE NCC | ES | 24th Feb 2012 |
| 2a00:a700::/32 | 4.3B × /64 | RIPE NCC | DE | 30th Jun 2015 |
| 2a00:a720::/32 | 4.3B × /64 | RIPE NCC | IT | 25th Jun 2013 |
| 2a00:a7e0::/32 | 4.3B × /64 | RIPE NCC | FR | 26th Jun 2013 |
| 2a00:a820::/32 | 4.3B × /64 | RIPE NCC | GB | 26th Jun 2013 |
| 2a00:a840::/32 | 4.3B × /64 | RIPE NCC | ES | 27th Feb 2012 |
| 2a00:a860::/32 | 4.3B × /64 | RIPE NCC | GB | 26th Jun 2013 |