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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,521 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a02:1638::/32 | 4.3B × /64 | RIPE NCC |  CZ | 28th May 2010 |
| 2a02:16b0::/32 | 4.3B × /64 | RIPE NCC |  KW | 8th Jun 2010 |
| 2a02:16b8::/32 | 4.3B × /64 | RIPE NCC |  UA | 7th Jun 2010 |
| 2a02:16c0::/29 | 34.4B × /64 | RIPE NCC |  IR | 9th Jun 2010 |
| 2a02:1700::/32 | 4.3B × /64 | RIPE NCC |  GB | 11th Jun 2010 |
| 2a02:170::/32 | 4.3B × /64 | RIPE NCC |  NL | 13th Mar 2008 |
| 2a02:1718::/32 | 4.3B × /64 | RIPE NCC |  AE | 14th Jun 2010 |
| 2a02:1750::/32 | 4.3B × /64 | RIPE NCC |  RU | 17th Jun 2010 |
| 2a02:1770::/32 | 4.3B × /64 | RIPE NCC |  PL | 17th Jun 2010 |
| 2a02:1780::/32 | 4.3B × /64 | RIPE NCC |  SE | 18th Jun 2010 |
| 2a02:1788::/32 | 4.3B × /64 | RIPE NCC | GB | 18th Jun 2010 |
| 2a02:178::/32 | 4.3B × /64 | RIPE NCC |  TR | 17th Mar 2008 |
| 2a02:1790::/32 | 4.3B × /64 | RIPE NCC |  FI | 21st Jun 2010 |
| 2a02:17a8::/32 | 4.3B × /64 | RIPE NCC |  BA | 23rd Jun 2010 |
| 2a02:17f0::/32 | 4.3B × /64 | RIPE NCC | GB | 24th Jun 2010 |
| 2a02:190::/32 | 4.3B × /64 | RIPE NCC | SE | 18th Mar 2008 |
| 2a02:1e8::/32 | 4.3B × /64 | RIPE NCC | RU | 26th Mar 2008 |
| 2a02:2030::/32 | 4.3B × /64 | RIPE NCC | BA | 29th Jun 2010 |
| 2a02:2040::/32 | 4.3B × /64 | RIPE NCC |  IT | 29th Jun 2010 |
| 2a02:2060::/32 | 4.3B × /64 | RIPE NCC |  FR | 30th Jun 2010 |
| 2a02:2080::/32 | 4.3B × /64 | RIPE NCC | GB | 1st Jul 2010 |
| 2a02:20b8::/32 | 4.3B × /64 | RIPE NCC |  HR | 7th Jul 2010 |
| 2a02:20c0::/32 | 4.3B × /64 | RIPE NCC | GB | 8th Jul 2010 |
| 2a02:20e0::/29 | 34.4B × /64 | RIPE NCC | NL | 12th Jul 2010 |
| 2a02:20f8::/32 | 4.3B × /64 | RIPE NCC | FR | 12th Jul 2010 |
| 2a02:2140::/29 | 34.4B × /64 | RIPE NCC | FR | 14th Jul 2010 |
| 2a02:2150::/32 | 4.3B × /64 | RIPE NCC | IT | 15th Jul 2010 |
| 2a02:2180::/32 | 4.3B × /64 | RIPE NCC |  DK | 16th Jul 2010 |
| 2a02:21b8::/32 | 4.3B × /64 | RIPE NCC | NL | 22nd Jul 2010 |
| 2a02:21c0::/32 | 4.3B × /64 | RIPE NCC | BA | 22nd Jul 2010 |
| 2a02:21d8::/32 | 4.3B × /64 | RIPE NCC |  CH | 27th Jul 2010 |
| 2a02:2200::/32 | 4.3B × /64 | RIPE NCC |  NO | 30th Jul 2010 |
| 2a02:2218::/29 | 34.4B × /64 | RIPE NCC | FR | 3rd Aug 2010 |
| 2a02:2258::/32 | 4.3B × /64 | RIPE NCC | FR | 9th Aug 2010 |
| 2a02:22b0::/32 | 4.3B × /64 | RIPE NCC | NO | 17th Aug 2010 |
| 2a02:22b8::/32 | 4.3B × /64 | RIPE NCC | NO | 18th Aug 2010 |
| 2a02:22c8::/32 | 4.3B × /64 | RIPE NCC | DK | 18th Aug 2010 |
| 2a02:22d8::/32 | 4.3B × /64 | RIPE NCC |  DE | 19th Aug 2010 |
| 2a02:2300::/32 | 4.3B × /64 | RIPE NCC | GB | 24th Aug 2010 |
| 2a02:2358::/32 | 4.3B × /64 | RIPE NCC | FR | 2nd Sept 2010 |
| 2a02:2388::/32 | 4.3B × /64 | RIPE NCC | NL | 3rd Sept 2010 |
| 2a02:2390::/32 | 4.3B × /64 | RIPE NCC |  GE | 6th Sept 2010 |
| 2a02:23b0::/32 | 4.3B × /64 | RIPE NCC | FR | 7th Sept 2010 |
| 2a02:23d8::/32 | 4.3B × /64 | RIPE NCC | DE | 9th Sept 2010 |
| 2a02:2410::/32 | 4.3B × /64 | RIPE NCC |  AT | 14th Sept 2010 |
| 2a02:2438::/32 | 4.3B × /64 | RIPE NCC | RU | 16th Sept 2010 |
| 2a02:2458::/32 | 4.3B × /64 | RIPE NCC | GB | 17th Sept 2010 |
| 2a02:2468::/32 | 4.3B × /64 | RIPE NCC |  CA | 20th Sept 2010 |
| 2a02:2480::/32 | 4.3B × /64 | RIPE NCC | DE | 21st Sept 2010 |
| 2a02:24c8::/32 | 4.3B × /64 | RIPE NCC |  SA | 27th Sept 2010 |