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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,195 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.69.156.0/23 | 512 | ARIN |  US | 3rd Oct 1994 |
| 192.69.158.0/24 | 256 | ARIN | US | 3rd Oct 1994 |
| 192.69.188.0/23 | 512 | ARIN | US | 21st Nov 2014 |
| 192.69.190.0/24 | 256 | ARIN | US | 13th Aug 1999 |
| 192.69.191.0/24 | 256 | ARIN | US | 1st Jul 2026 |
| 192.69.229.0/24 | 256 | ARIN | US | 13th Sept 1993 |
| 192.69.230.0/24 | 256 | ARIN | US | 13th Sept 1993 |
| 192.69.231.0/24 | 256 | ARIN | US | 13th Sept 1993 |
| 192.69.234.0/24 | 256 | ARIN |  DE | 20th Jan 1990 |
| 192.69.248.0/21 | 2k | ARIN | US | 9th Dec 2025 |
| 192.69.46.0/24 | 256 | ARIN | US | 25th Jan 1993 |
| 192.69.64.0/24 | 256 | ARIN |  BE | 20th Aug 1993 |
| 192.69.8.0/21 | 2k | ARIN | US | 14th Aug 2024 |
| 192.69.80.0/24 | 256 | ARIN | US | 18th Aug 2000 |
| 192.69.82.0/23 | 512 | ARIN | US | 11th Nov 2014 |
| 192.69.84.0/24 | 256 | ARIN | US | 17th Sept 1993 |
| 192.70.100.0/22 | 1k | RIPE NCC |  FR | 1st Sept 1993 |
| 192.70.112.0/23 | 512 | RIPE NCC | FR | 1st Sept 1993 |
| 192.70.114.0/24 | 256 | RIPE NCC | FR | 15th Mar 1990 |
| 192.70.115.0/24 | 256 | RIPE NCC | FR | 15th Mar 1990 |
| 192.70.116.0/24 | 256 | RIPE NCC | FR | 15th Mar 1990 |
| 192.70.117.0/24 | 256 | RIPE NCC | FR | 20th May 1993 |
| 192.70.118.0/24 | 256 | RIPE NCC | FR | 24th Aug 2009 |
| 192.70.119.0/24 | 256 | RIPE NCC | FR | 19th Apr 1993 |
| 192.70.121.0/24 | 256 | ARIN | US | 24th Mar 1990 |
| 192.70.127.0/24 | 256 | ARIN | US | 24th Mar 1990 |
| 192.70.128.0/24 | 256 | ARIN | US | 24th Mar 1990 |
| 192.70.129.0/24 | 256 | ARIN | US | 24th Mar 1990 |
| 192.70.130.0/24 | 256 | ARIN | US | 24th Mar 1990 |
| 192.70.132.0/24 | 256 | ARIN | US | 25th Mar 1990 |
| 192.70.133.0/24 | 256 | RIPE NCC |  TR | 26th Mar 1990 |
| 192.70.134.0/24 | 256 | RIPE NCC | TR | 26th Mar 1990 |
| 192.70.136.0/24 | 256 | RIPE NCC |  IT | 26th Mar 1990 |
| 192.70.138.0/24 | 256 | ARIN | US | 26th Mar 1990 |
| 192.70.139.0/24 | 256 | ARIN | US | 26th Mar 1990 |
| 192.70.140.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.142.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.143.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.144.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.145.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.146.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.147.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.148.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.150.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.151.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.152.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.153.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.154.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.155.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |
| 192.70.156.0/24 | 256 | RIPE NCC | DE | 23rd May 1990 |