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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.62.80.0/20 | 4.1k | RIPE NCC |  GB | 7th Oct 1994 |
| 194.63.136.0/22 | 1k | RIPE NCC |  BG | 19th May 2004 |
| 194.64.148.0/22 | 1k | RIPE NCC |  DE | 6th Apr 1994 |
| 194.64.152.0/21 | 2k | RIPE NCC | DE | 6th Apr 1994 |
| 194.69.0.0/24 | 256 | RIPE NCC | DE | 20th Nov 1996 |
| 194.69.181.0/24 | 256 | RIPE NCC |  CH | 10th Mar 1997 |
| 194.69.183.0/24 | 256 | RIPE NCC | CH | 10th Mar 1997 |
| 194.69.2.0/23 | 512 | RIPE NCC | CH | 10th Mar 1998 |
| 194.69.240.0/21 | 2k | RIPE NCC |  ES | 4th Dec 1996 |
| 194.69.252.0/24 | 256 | RIPE NCC | ES | 4th Dec 1996 |
| 194.69.255.0/24 | 256 | RIPE NCC | ES | 4th Dec 1996 |
| 194.69.32.0/22 | 1k | RIPE NCC |  NL | 7th Jan 1997 |
| 194.69.38.0/23 | 512 | RIPE NCC | NL | 7th Jan 1997 |
| 194.69.4.0/23 | 512 | RIPE NCC | CH | 10th Mar 1998 |
| 194.69.40.0/23 | 512 | RIPE NCC | NL | 7th Jan 1997 |
| 194.69.44.0/22 | 1k | RIPE NCC | NL | 7th Jan 1997 |
| 194.69.48.0/21 | 2k | RIPE NCC | NL | 7th Jan 1997 |
| 194.69.56.0/22 | 1k | RIPE NCC | NL | 7th Jan 1997 |
| 194.70.192.0/19 | 8.2k | RIPE NCC | GB | 28th Jun 1994 |
| 194.70.224.0/21 | 2k | RIPE NCC | GB | 28th Jun 1994 |
| 194.70.232.0/23 | 512 | RIPE NCC | GB | 28th Jun 1994 |
| 194.70.235.0/24 | 256 | RIPE NCC | GB | 28th Jun 1994 |
| 194.70.236.0/22 | 1k | RIPE NCC | GB | 28th Jun 1994 |
| 194.76.10.0/23 | 512 | RIPE NCC |  FR | 28th Oct 2019 |
| 194.76.100.0/23 | 512 | RIPE NCC | DE | 1st Sept 1994 |
| 194.76.12.0/23 | 512 | RIPE NCC | FR | 28th Oct 2019 |
| 194.76.136.0/22 | 1k | RIPE NCC |  CY | 23rd May 2018 |
| 194.76.14.0/24 | 256 | RIPE NCC | DE | 11th Aug 1994 |
| 194.76.140.0/23 | 512 | RIPE NCC | DE | 8th Sept 1994 |
| 194.76.148.0/24 | 256 | RIPE NCC | DE | 16th Sept 1994 |
| 194.76.152.0/23 | 512 | RIPE NCC | DE | 16th Sept 1994 |
| 194.76.164.0/23 | 512 | RIPE NCC | DE | 18th Sept 1994 |
| 194.76.166.0/23 | 512 | RIPE NCC | DE | 18th Sept 1994 |
| 194.76.170.0/24 | 256 | RIPE NCC | DE | 18th Sept 1994 |
| 194.76.171.0/24 | 256 | RIPE NCC | DE | 19th Sept 1994 |
| 194.76.184.0/24 | 256 | RIPE NCC |  GE | 26th Jan 2026 |
| 194.76.19.0/24 | 256 | RIPE NCC | DE | 16th Aug 1994 |
| 194.76.194.0/23 | 512 | RIPE NCC | DE | 22nd Sept 1994 |
| 194.76.196.0/23 | 512 | RIPE NCC | DE | 22nd Sept 1994 |
| 194.76.198.0/24 | 256 | RIPE NCC |  EE | 26th Jan 2026 |
| 194.76.199.0/24 | 256 | RIPE NCC |  IT | 26th Jan 2026 |
| 194.76.20.0/22 | 1k | RIPE NCC | DE | 16th Aug 1994 |
| 194.76.216.0/24 | 256 | RIPE NCC | DE | 28th Sept 1994 |
| 194.76.219.0/24 | 256 | RIPE NCC | DE | 19th Sept 1994 |
| 194.76.228.0/23 | 512 | RIPE NCC | DE | 5th Oct 1994 |
| 194.76.230.0/24 | 256 | RIPE NCC | DE | 5th Oct 1994 |
| 194.76.24.0/23 | 512 | RIPE NCC | DE | 16th Aug 1994 |
| 194.76.247.0/24 | 256 | RIPE NCC |  CZ | 5th Apr 2012 |
| 194.76.32.0/22 | 1k | RIPE NCC |  RO | 23rd May 2018 |
| 194.76.46.0/23 | 512 | RIPE NCC |  RU | 28th Oct 2019 |