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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
25,273 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.108.168.0/22 | 1k | RIPE NCC |  SK | 24th Jul 1991 |
| 192.108.174.0/24 | 256 | RIPE NCC | SK | 24th Jul 1991 |
| 192.108.234.0/24 | 256 | RIPE NCC |  CH | 2nd Aug 1991 |
| 192.108.238.0/24 | 256 | RIPE NCC |  AT | 5th Aug 1991 |
| 192.108.27.0/24 | 256 | RIPE NCC |  EU | 1st May 1991 |
| 192.108.28.0/24 | 256 | RIPE NCC | EU | 1st May 1991 |
| 192.108.29.0/24 | 256 | RIPE NCC | EU | 1st May 1991 |
| 192.108.49.0/24 | 256 | RIPE NCC |  DE | 1st May 1991 |
| 192.108.55.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.108.56.0/21 | 2k | RIPE NCC | DE | 1st May 1991 |
| 192.108.64.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.108.65.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.108.74.0/23 | 512 | RIPE NCC | DE | 1st May 1991 |
| 192.108.76.0/22 | 1k | RIPE NCC | DE | 1st May 1991 |
| 192.108.80.0/21 | 2k | RIPE NCC | DE | 1st May 1991 |
| 192.109.0.0/21 | 2k | RIPE NCC | DE | 1st May 1991 |
| 192.109.107.0/24 | 256 | RIPE NCC | DE | 19th Mar 1993 |
| 192.109.112.0/23 | 512 | RIPE NCC | DE | 22nd Mar 1994 |
| 192.109.114.0/24 | 256 | RIPE NCC | DE | 14th Apr 1994 |
| 192.109.118.0/24 | 256 | RIPE NCC | DE | 18th Jan 1994 |
| 192.109.128.0/24 | 256 | RIPE NCC |  NL | 1st Sept 1993 |
| 192.109.137.0/24 | 256 | RIPE NCC | DE | 21st Jul 1992 |
| 192.109.148.0/24 | 256 | RIPE NCC |  FR | 1st Sept 1993 |
| 192.109.160.0/24 | 256 | RIPE NCC | DE | 22nd Jun 1993 |
| 192.109.161.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.162.0/24 | 256 | RIPE NCC | DE | 30th Apr 1993 |
| 192.109.163.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.164.0/24 | 256 | RIPE NCC | DE | 23rd Feb 1994 |
| 192.109.166.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.167.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.168.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.169.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.170.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.171.0/24 | 256 | RIPE NCC | DE | 16th Feb 1994 |
| 192.109.172.0/24 | 256 | RIPE NCC |  SI | 12th Nov 2019 |
| 192.109.173.0/24 | 256 | RIPE NCC | DE | 1st Sept 1993 |
| 192.109.174.0/24 | 256 | RIPE NCC | DE | 1st Sept 1993 |
| 192.109.176.0/24 | 256 | RIPE NCC | DE | 19th Mar 1993 |
| 192.109.178.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.179.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.18.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.180.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.181.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.182.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.183.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.189.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.191.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.192.0/23 | 512 | RIPE NCC | DE | 1st May 1991 |
| 192.109.194.0/24 | 256 | RIPE NCC | DE | 1st May 1991 |
| 192.109.196.0/24 | 256 | RIPE NCC | SI | 12th Nov 2019 |