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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
30,463 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 198.162.159.0/24 | 256 | ARIN |  CA | 28th Oct 1993 |
| 198.162.2.0/24 | 256 | ARIN | CA | 12th Aug 1993 |
| 198.162.224.0/24 | 256 | ARIN |  US | 15th Oct 1993 |
| 198.162.230.0/24 | 256 | ARIN | US | 13th May 2013 |
| 198.162.231.0/24 | 256 | ARIN | CA | 11th Mar 1994 |
| 198.162.236.0/24 | 256 | ARIN | CA | 18th Jan 1994 |
| 198.162.237.0/24 | 256 | ARIN | CA | 22nd Mar 1994 |
| 198.162.238.0/24 | 256 | ARIN | CA | 22nd Mar 1994 |
| 198.162.239.0/24 | 256 | ARIN | US | 29th Mar 1994 |
| 198.162.240.0/21 | 2k | ARIN | CA | 4th Nov 1993 |
| 198.162.248.0/22 | 1k | ARIN | CA | 3rd Mar 1994 |
| 198.162.252.0/23 | 512 | ARIN | CA | 3rd Mar 1994 |
| 198.162.254.0/24 | 256 | ARIN | CA | 28th Mar 1994 |
| 198.162.4.0/24 | 256 | ARIN | CA | 1st Sept 1993 |
| 198.162.5.0/24 | 256 | ARIN | CA | 9th Sept 1993 |
| 198.162.6.0/24 | 256 | ARIN | CA | 14th Sept 1993 |
| 198.162.64.0/24 | 256 | ARIN | CA | 2nd Jun 1993 |
| 198.162.65.0/24 | 256 | ARIN | CA | 5th Feb 1997 |
| 198.162.66.0/24 | 256 | ARIN | CA | 3rd Jun 1993 |
| 198.162.7.0/24 | 256 | ARIN | CA | 10th Sept 1993 |
| 198.162.70.0/24 | 256 | ARIN | CA | 9th Jul 1993 |
| 198.162.72.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.73.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.74.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.75.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.76.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.77.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.78.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.79.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.8.0/24 | 256 | ARIN | CA | 20th Sept 1993 |
| 198.162.80.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.81.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.82.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.83.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 198.162.84.0/24 | 256 | ARIN | CA | 31st Aug 1993 |
| 198.162.85.0/24 | 256 | ARIN | CA | 31st Aug 1993 |
| 198.162.86.0/24 | 256 | ARIN | CA | 13th Oct 1993 |
| 198.162.88.0/22 | 1k | ARIN | US | 20th Dec 2024 |
| 198.162.9.0/24 | 256 | ARIN | CA | 21st Sept 1993 |
| 198.162.94.0/24 | 256 | ARIN | CA | 19th Oct 1993 |
| 198.162.95.0/24 | 256 | ARIN | CA | 19th Oct 1993 |
| 198.163.0.0/24 | 256 | ARIN | US | 13th May 2013 |
| 198.163.1.0/24 | 256 | ARIN | CA | 17th May 1993 |
| 198.163.104.0/22 | 1k | ARIN | CA | 19th Jan 1994 |
| 198.163.108.0/23 | 512 | ARIN | CA | 3rd Feb 1994 |
| 198.163.110.0/24 | 256 | ARIN | CA | 3rd Feb 1994 |
| 198.163.112.0/23 | 512 | ARIN | CA | 23rd Feb 1994 |
| 198.163.114.0/24 | 256 | ARIN | CA | 17th Nov 1994 |
| 198.163.115.0/24 | 256 | ARIN | CA | 17th Nov 1993 |
| 198.163.116.0/23 | 512 | ARIN | CA | 17th Nov 1993 |