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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Spain
904 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.112.78.0/24 | 256 | RIPE NCC |  ES | 2nd Aug 1991 |
| 192.112.79.0/24 | 256 | RIPE NCC | ES | 2nd Aug 1991 |
| 192.146.124.0/23 | 512 | RIPE NCC | ES | 24th Jan 1992 |
| 192.146.126.0/24 | 256 | RIPE NCC | ES | 24th Jan 1992 |
| 192.146.187.0/24 | 256 | RIPE NCC | ES | 3rd Feb 1992 |
| 192.149.19.0/24 | 256 | RIPE NCC | ES | 24th Feb 1992 |
| 192.159.84.0/24 | 256 | RIPE NCC | ES | 29th Apr 1992 |
| 192.159.85.0/24 | 256 | RIPE NCC | ES | 29th Apr 1992 |
| 192.160.33.0/24 | 256 | RIPE NCC | ES | 27th Apr 1992 |
| 192.67.79.0/24 | 256 | RIPE NCC | ES | 16th Jan 1990 |
| 192.77.140.0/24 | 256 | RIPE NCC | ES | 26th Aug 1991 |
| 192.77.141.0/24 | 256 | RIPE NCC | ES | 26th Aug 1991 |
| 193.104.44.0/24 | 256 | RIPE NCC | ES | 13th Oct 2009 |
| 193.105.34.0/24 | 256 | RIPE NCC | ES | 14th Jan 2010 |
| 193.109.116.0/24 | 256 | RIPE NCC | ES | 18th Sept 2001 |
| 193.111.84.0/24 | 256 | RIPE NCC | ES | 3rd Apr 2002 |
| 193.148.4.0/24 | 256 | RIPE NCC | ES | 1st Sept 1993 |
| 193.151.246.0/24 | 256 | RIPE NCC | ES | 5th Feb 2024 |
| 193.164.226.0/23 | 512 | RIPE NCC | ES | 8th Jun 2000 |
| 193.178.115.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.212.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.218.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.31.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.178.52.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.186.1.0/24 | 256 | RIPE NCC | ES | 18th Nov 2019 |
| 193.201.108.0/24 | 256 | RIPE NCC | ES | 27th Jun 2002 |
| 193.219.103.0/24 | 256 | RIPE NCC | ES | 27th Sept 2006 |
| 193.227.132.0/24 | 256 | RIPE NCC | ES | 14th Jun 2005 |
| 193.23.166.0/24 | 256 | RIPE NCC | ES | 13th Nov 2019 |
| 193.23.173.0/24 | 256 | RIPE NCC | ES | 13th Nov 2019 |
| 193.23.242.0/24 | 256 | RIPE NCC | ES | 13th Nov 2019 |
| 193.239.196.0/24 | 256 | RIPE NCC | ES | 17th Oct 2019 |
| 193.242.98.0/24 | 256 | RIPE NCC | ES | 17th Nov 2004 |
| 193.246.154.0/23 | 512 | RIPE NCC | ES | 17th Oct 2019 |
| 193.247.214.0/23 | 512 | RIPE NCC | ES | 17th Oct 2019 |
| 193.27.47.0/24 | 256 | RIPE NCC | ES | 11th Aug 2011 |
| 193.29.49.0/24 | 256 | RIPE NCC | ES | 22nd Sept 2025 |
| 193.30.31.0/24 | 256 | RIPE NCC | ES | 10th Nov 2020 |
| 193.41.160.0/22 | 1k | RIPE NCC | ES | 17th Mar 2010 |
| 193.42.143.0/24 | 256 | RIPE NCC | ES | 15th Sept 2008 |
| 193.42.28.0/22 | 1k | RIPE NCC | ES | 13th Sept 2018 |
| 193.91.0.0/24 | 256 | RIPE NCC | ES | 24th Oct 1995 |
| 194.0.35.0/24 | 256 | RIPE NCC | ES | 1st Sept 2011 |
| 194.104.141.0/24 | 256 | RIPE NCC | ES | 1st Oct 2021 |
| 194.117.53.0/26 | 64 | RIPE NCC | ES | 8th Sept 2025 |
| 194.146.99.0/24 | 256 | RIPE NCC | ES | 22nd Nov 2019 |
| 194.147.22.0/23 | 512 | RIPE NCC | ES | 31st Oct 2019 |
| 194.15.140.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |
| 194.15.146.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |
| 194.15.182.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |