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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.34.198.128/25 | 128 | RIPE NCC |  PL | 27th Apr 2009 |
| 193.34.198.64/26 | 64 | RIPE NCC |  TR | 13th Sept 2024 |
| 193.34.199.0/25 | 128 | RIPE NCC |  NL | 20th Aug 2010 |
| 193.34.199.128/26 | 64 | RIPE NCC |  DE | 6th Jul 2026 |
| 193.34.199.192/26 | 64 | RIPE NCC |  GB | 31st Aug 2026 |
| 193.34.200.0/25 | 128 | RIPE NCC | DE | 3rd Nov 2009 |
| 193.34.200.128/25 | 128 | RIPE NCC |  RU | 3rd Dec 2009 |
| 193.34.203.0/25 | 128 | RIPE NCC | RU | 6th Apr 2010 |
| 193.34.203.128/26 | 64 | RIPE NCC |  AE | 8th Jul 2025 |
| 193.34.203.192/26 | 64 | RIPE NCC | DE | 2nd Jul 2024 |
| 193.34.228.0/23 | 512 | RIPE NCC |  MC | 8th Oct 2019 |
| 193.34.36.0/22 | 1k | RIPE NCC | DE | 8th Nov 2006 |
| 193.34.88.0/22 | 1k | RIPE NCC |  BE | 24th Nov 2006 |
| 193.35.109.0/24 | 256 | RIPE NCC | RU | 16th Sept 2011 |
| 193.35.162.0/23 | 512 | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.164.0/22 | 1k | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.168.0/21 | 2k | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.176.0/22 | 1k | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.180.0/23 | 512 | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.182.0/23 | 512 | RIPE NCC | GB | 11th Jan 1993 |
| 193.35.184.0/21 | 2k | RIPE NCC | GB | 11th Jan 1993 |
| 193.35.192.0/22 | 1k | RIPE NCC | GB | 11th Jan 1993 |
| 193.35.2.0/23 | 512 | RIPE NCC | MC | 8th Oct 2019 |
| 193.35.24.0/24 | 256 | RIPE NCC | PL | 14th Nov 2019 |
| 193.35.246.0/24 | 256 | RIPE NCC | GB | 8th Feb 1993 |
| 193.35.247.0/24 | 256 | RIPE NCC | GB | 8th Feb 1993 |
| 193.35.37.0/24 | 256 | RIPE NCC |  IE | 25th Jun 2012 |
| 193.35.45.0/24 | 256 | RIPE NCC | PL | 24th Sept 2024 |
| 193.35.60.0/24 | 256 | RIPE NCC | PL | 4th Jul 2012 |
| 193.35.61.0/24 | 256 | RIPE NCC | PL | 14th Nov 2019 |
| 193.35.64.0/20 | 4.1k | RIPE NCC |  CH | 27th Nov 1992 |
| 193.36.112.0/22 | 1k | APNIC |  TH | 19th Oct 2018 |
| 193.36.136.0/21 | 2k | RIPE NCC | GB | 2nd Sept 1994 |
| 193.36.152.0/21 | 2k | RIPE NCC | NL | 8th Mar 1993 |
| 193.36.16.0/20 | 4.1k | RIPE NCC | GB | 9th Feb 1993 |
| 193.36.160.0/23 | 512 | RIPE NCC | NL | 8th Mar 1993 |
| 193.36.173.0/24 | 256 | RIPE NCC | GB | 30th Mar 1993 |
| 193.36.2.0/24 | 256 | RIPE NCC |  FR | 12th Feb 1993 |
| 193.36.227.0/24 | 256 | RIPE NCC |  CZ | 14th Nov 2019 |
| 193.36.228.0/24 | 256 | RIPE NCC |  SC | 14th Nov 2019 |
| 193.36.4.0/22 | 1k | RIPE NCC | GB | 8th Feb 1993 |
| 193.36.45.0/24 | 256 | RIPE NCC | FR | 5th Mar 2009 |
| 193.36.56.0/22 | 1k | RIPE NCC | RU | 12th Sept 2018 |
| 193.36.73.0/24 | 256 | RIPE NCC |  AU | 8th Oct 2019 |
| 193.36.74.0/24 | 256 | RIPE NCC | DE | 14th Nov 2019 |
| 193.36.75.0/24 | 256 | RIPE NCC | NL | 8th Mar 1993 |
| 193.36.77.0/24 | 256 | RIPE NCC | GB | 3rd Mar 1993 |
| 193.36.87.0/24 | 256 | RIPE NCC | NL | 3rd Mar 1993 |
| 193.37.0.0/19 | 8.2k | RIPE NCC | GB | 31st Mar 1993 |
| 193.37.104.0/22 | 1k | RIPE NCC |  US | 27th Apr 1993 |