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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.56.95.0/24 | 256 | RIPE NCC |  FR | 12th Oct 1992 |
| 193.56.96.0/24 | 256 | RIPE NCC | FR | 12th Oct 1992 |
| 193.56.97.0/24 | 256 | RIPE NCC | FR | 12th Oct 1992 |
| 193.56.98.0/24 | 256 | RIPE NCC | FR | 12th Oct 1992 |
| 193.56.99.0/24 | 256 | RIPE NCC | FR | 12th Oct 1992 |
| 193.57.10.0/24 | 256 | RIPE NCC | FR | 24th Sept 1993 |
| 193.57.104.0/24 | 256 | RIPE NCC |  CH | 15th Nov 2019 |
| 193.57.108.0/24 | 256 | RIPE NCC |  HU | 15th Nov 2019 |
| 193.57.11.0/24 | 256 | RIPE NCC | FR | 29th Dec 1993 |
| 193.57.111.0/24 | 256 | RIPE NCC | FR | 4th May 1994 |
| 193.57.127.0/24 | 256 | RIPE NCC | HU | 15th Nov 2019 |
| 193.57.132.0/22 | 1k | RIPE NCC | FR | 14th Apr 1994 |
| 193.57.140.0/24 | 256 | RIPE NCC | CH | 15th Nov 2019 |
| 193.57.142.0/23 | 512 | RIPE NCC |  NO | 10th Oct 2019 |
| 193.57.152.0/22 | 1k | RIPE NCC | FR | 16th Mar 1993 |
| 193.57.173.0/24 | 256 | RIPE NCC |  GB | 15th Nov 2019 |
| 193.57.174.0/23 | 512 | RIPE NCC |  NL | 10th Oct 2019 |
| 193.57.182.0/23 | 512 | RIPE NCC |  US | 5th Jul 1994 |
| 193.57.202.0/23 | 512 | RIPE NCC | NL | 10th Oct 2019 |
| 193.57.222.0/24 | 256 | RIPE NCC | FR | 15th Jul 1993 |
| 193.57.224.0/24 | 256 | RIPE NCC | GB | 15th Nov 2019 |
| 193.57.232.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.233.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.234.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.235.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.236.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.237.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.238.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.239.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.24.0/24 | 256 | RIPE NCC | FR | 19th Jan 1993 |
| 193.57.240.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.242.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.243.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.244.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.245.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.246.0/24 | 256 | RIPE NCC | FR | 2nd Apr 1993 |
| 193.57.25.0/24 | 256 | RIPE NCC | FR | 19th Jan 1993 |
| 193.57.250.0/23 | 512 | RIPE NCC | FR | 15th Jul 1993 |
| 193.57.252.0/23 | 512 | RIPE NCC | FR | 15th Jul 1993 |
| 193.57.26.0/24 | 256 | RIPE NCC | FR | 19th Jan 1993 |
| 193.57.32.0/24 | 256 | RIPE NCC | FR | 20th Jan 1993 |
| 193.57.48.0/24 | 256 | RIPE NCC | FR | 20th Jan 1993 |
| 193.57.50.0/23 | 512 | RIPE NCC |  DE | 10th Oct 2019 |
| 193.57.58.0/23 | 512 | RIPE NCC | DE | 10th Oct 2019 |
| 193.57.6.0/24 | 256 | RIPE NCC |  FI | 18th Oct 1993 |
| 193.57.64.0/24 | 256 | RIPE NCC | FR | 3rd Feb 1993 |
| 193.57.77.0/24 | 256 | RIPE NCC | FR | 15th Apr 1994 |
| 193.57.78.0/23 | 512 | RIPE NCC | FR | 15th Apr 1994 |
| 193.57.80.0/22 | 1k | RIPE NCC | GB | 1st May 2018 |
| 193.57.84.0/22 | 1k | RIPE NCC | FR | 14th Apr 1994 |