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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,521 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a01:6a0::/32 | 4.3B × /64 | RIPE NCC |  IT | 4th Dec 2007 |
| 2a01:6a80::/32 | 4.3B × /64 | RIPE NCC |  CZ | 16th Jun 2011 |
| 2a01:6aa0::/32 | 4.3B × /64 | RIPE NCC |  RU | 16th Dec 2013 |
| 2a01:6ac0::/32 | 4.3B × /64 | RIPE NCC |  DE | 15th Jun 2012 |
| 2a01:6b00::/32 | 4.3B × /64 | RIPE NCC | RU | 2nd Mar 2011 |
| 2a01:6b60::/32 | 4.3B × /64 | RIPE NCC |  FR | 17th Dec 2013 |
| 2a01:6ba0::/32 | 4.3B × /64 | RIPE NCC | RU | 17th Dec 2013 |
| 2a01:6c00::/32 | 4.3B × /64 | RIPE NCC |  PL | 29th Dec 2010 |
| 2a01:6c0::/32 | 4.3B × /64 | RIPE NCC | DE | 11th Dec 2007 |
| 2a01:6c20::/32 | 4.3B × /64 | RIPE NCC | RU | 17th Dec 2013 |
| 2a01:6ce0::/32 | 4.3B × /64 | RIPE NCC |  IE | 18th Dec 2013 |
| 2a01:6d20::/32 | 4.3B × /64 | RIPE NCC |  FI | 18th Dec 2013 |
| 2a01:6d40::/32 | 4.3B × /64 | RIPE NCC |  BE | 22nd Jun 2016 |
| 2a01:6e20::/32 | 4.3B × /64 | RIPE NCC | RU | 19th Dec 2013 |
| 2a01:6fa0::/32 | 4.3B × /64 | RIPE NCC |  ES | 20th Dec 2013 |
| 2a01:6fc0::/29 | 34.4B × /64 | RIPE NCC |  AT | 20th Jun 2012 |
| 2a01:6fe0::/32 | 4.3B × /64 | RIPE NCC |  UA | 23rd Dec 2013 |
| 2a01:7000::/32 | 4.3B × /64 | RIPE NCC | IT | 6th Dec 2010 |
| 2a01:7020::/32 | 4.3B × /64 | RIPE NCC | IE | 23rd Dec 2013 |
| 2a01:7060::/32 | 4.3B × /64 | RIPE NCC | FR | 23rd Dec 2013 |
| 2a01:7100::/32 | 4.3B × /64 | RIPE NCC | RU | 2nd Mar 2011 |
| 2a01:7180::/32 | 4.3B × /64 | RIPE NCC |  NL | 20th Jun 2011 |
| 2a01:718::/32 | 4.3B × /64 | RIPE NCC |  TR | 28th Dec 2007 |
| 2a01:720::/32 | 4.3B × /64 | RIPE NCC | TR | 31st Dec 2007 |
| 2a01:7240::/32 | 4.3B × /64 | RIPE NCC | IE | 21st Jun 2012 |
| 2a01:7280::/32 | 4.3B × /64 | RIPE NCC |  GB | 20th Jun 2011 |
| 2a01:72c0::/32 | 4.3B × /64 | RIPE NCC | PL | 3rd Jul 2015 |
| 2a01:72e0::/32 | 4.3B × /64 | RIPE NCC | ES | 27th Dec 2013 |
| 2a01:730::/32 | 4.3B × /64 | RIPE NCC | TR | 8th Jan 2008 |
| 2a01:7320::/32 | 4.3B × /64 | RIPE NCC |  IR | 30th Dec 2013 |
| 2a01:7340::/29 | 34.4B × /64 | RIPE NCC | NL | 21st Jun 2012 |
| 2a01:7380::/32 | 4.3B × /64 | RIPE NCC |  US | 20th Jun 2011 |
| 2a01:738::/32 | 4.3B × /64 | RIPE NCC | GB | 10th Jan 2008 |
| 2a01:73a0::/32 | 4.3B × /64 | RIPE NCC | FR | 2nd Jan 2014 |
| 2a01:740::/32 | 4.3B × /64 | RIPE NCC | DE | 10th Jan 2008 |
| 2a01:7460::/32 | 4.3B × /64 | RIPE NCC | IT | 3rd Jul 2015 |
| 2a01:74a0::/32 | 4.3B × /64 | RIPE NCC | GB | 3rd Jan 2014 |
| 2a01:7560::/32 | 4.3B × /64 | RIPE NCC | ES | 2nd Jun 2016 |
| 2a01:7580::/32 | 4.3B × /64 | RIPE NCC | ES | 20th Jun 2011 |
| 2a01:75a0::/32 | 4.3B × /64 | RIPE NCC |  AE | 6th Jan 2014 |
| 2a01:75e0::/32 | 4.3B × /64 | RIPE NCC | US | 7th Jan 2014 |
| 2a01:7620::/32 | 4.3B × /64 | RIPE NCC |  LU | 7th Jan 2014 |
| 2a01:7660::/32 | 4.3B × /64 | RIPE NCC | DE | 7th Jan 2014 |
| 2a01:76a0::/32 | 4.3B × /64 | RIPE NCC |  DK | 8th Jan 2014 |
| 2a01:7720::/32 | 4.3B × /64 | RIPE NCC | RU | 9th Jan 2014 |
| 2a01:7740::/29 | 34.4B × /64 | RIPE NCC | GB | 26th Jun 2012 |
| 2a01:7760::/32 | 4.3B × /64 | RIPE NCC | DE | 9th Jan 2014 |
| 2a01:77a0::/32 | 4.3B × /64 | RIPE NCC | IT | 9th Jan 2014 |
| 2a01:7840::/32 | 4.3B × /64 | RIPE NCC | TR | 26th Jun 2012 |
| 2a01:7880::/32 | 4.3B × /64 | RIPE NCC | ES | 3rd Jul 2015 |