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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with unannounced space registered through ARIN, largest first.
Unannounced blocks registered through ARIN
30,456 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.68.222.0/24 | 256 | ARIN |  US | 11th Jun 1990 |
| 192.68.225.0/24 | 256 | ARIN | US | 11th Jun 1990 |
| 192.68.226.0/24 | 256 | ARIN | US | 12th Jun 1990 |
| 192.68.227.0/24 | 256 | ARIN | US | 13th Jun 1990 |
| 192.68.229.0/24 | 256 | ARIN |  CA | 13th Jun 1990 |
| 192.68.233.0/24 | 256 | ARIN | US | 15th Jun 1990 |
| 192.68.25.0/24 | 256 | ARIN | US | 21st Dec 1989 |
| 192.68.253.0/24 | 256 | ARIN | US | 4th Jun 1990 |
| 192.68.28.0/24 | 256 | ARIN | US | 21st Dec 1989 |
| 192.68.30.0/24 | 256 | ARIN | US | 21st Dec 1989 |
| 192.68.52.0/24 | 256 | ARIN | US | 23rd Jan 1990 |
| 192.68.53.0/24 | 256 | ARIN | CA | 15th Feb 1990 |
| 192.68.54.0/23 | 512 | ARIN | CA | 15th Feb 1990 |
| 192.68.56.0/21 | 2k | ARIN | CA | 15th Feb 1990 |
| 192.68.64.0/23 | 512 | ARIN | CA | 15th Feb 1990 |
| 192.68.66.0/24 | 256 | ARIN | CA | 15th Feb 1990 |
| 192.68.67.0/24 | 256 | ARIN | CA | 30th Apr 1993 |
| 192.68.75.0/24 | 256 | ARIN | US | 15th Feb 1990 |
| 192.69.0.0/24 | 256 | ARIN | US | 13th Sept 1993 |
| 192.69.101.0/24 | 256 | ARIN | CA | 22nd Jun 2000 |
| 192.69.117.0/24 | 256 | ARIN | US | 5th Mar 1992 |
| 192.69.130.0/23 | 512 | ARIN | US | 18th Nov 2014 |
| 192.69.140.0/24 | 256 | ARIN | US | 18th Aug 2000 |
| 192.69.142.0/24 | 256 | ARIN | US | 6th Jan 1992 |
| 192.69.149.0/24 | 256 | ARIN | US | 3rd Oct 1994 |
| 192.69.150.0/23 | 512 | ARIN | US | 3rd Oct 1994 |
| 192.69.152.0/22 | 1k | ARIN | US | 3rd Oct 1994 |
| 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 |
| 192.70.121.0/24 | 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 |
| 192.70.138.0/24 | 256 | ARIN | US | 26th Mar 1990 |