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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,248 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 198.202.188.0/23 | 512 | ARIN |  US | 13th Oct 1993 |
| 198.202.19.0/24 | 256 | ARIN | US | 24th Jul 2025 |
| 198.202.190.0/23 | 512 | ARIN | US | 13th Oct 1993 |
| 198.202.192.0/23 | 512 | ARIN | US | 13th Oct 1993 |
| 198.202.194.0/24 | 256 | ARIN | US | 13th Oct 1993 |
| 198.202.197.0/24 | 256 | ARIN | US | 14th Oct 1993 |
| 198.202.198.0/24 | 256 | ARIN | US | 14th Oct 1993 |
| 198.202.204.0/24 | 256 | ARIN | US | 15th Oct 1993 |
| 198.202.205.0/24 | 256 | ARIN | US | 15th Oct 1993 |
| 198.202.206.0/24 | 256 | ARIN | US | 15th Oct 1993 |
| 198.202.207.0/24 | 256 | ARIN | US | 15th Oct 1993 |
| 198.202.209.0/24 | 256 | ARIN | US | 15th Oct 1993 |
| 198.202.210.0/24 | 256 | ARIN | US | 15th Oct 1993 |
| 198.202.212.0/24 | 256 | ARIN | US | 15th Oct 1993 |
| 198.202.213.0/24 | 256 | ARIN | US | 10th Dec 2012 |
| 198.202.215.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.216.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.217.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.218.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.220.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.222.0/24 | 256 | ARIN | US | 28th Oct 1993 |
| 198.202.223.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.224.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.225.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.227.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.230.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.231.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.232.0/24 | 256 | ARIN | US | 18th Oct 1993 |
| 198.202.233.0/24 | 256 | ARIN | US | 19th Oct 1993 |
| 198.202.234.0/24 | 256 | ARIN | US | 19th Oct 1993 |
| 198.202.236.0/24 | 256 | ARIN | US | 19th Oct 1993 |
| 198.202.237.0/24 | 256 | ARIN | US | 19th Oct 1993 |
| 198.202.238.0/24 | 256 | ARIN | US | 19th Oct 1993 |
| 198.202.239.0/24 | 256 | ARIN | US | 19th Oct 1993 |
| 198.202.243.0/24 | 256 | ARIN | US | 21st Oct 1993 |
| 198.202.244.0/24 | 256 | ARIN | US | 21st Oct 1993 |
| 198.202.245.0/24 | 256 | ARIN | US | 21st Oct 1993 |
| 198.202.246.0/24 | 256 | ARIN | US | 21st Oct 1993 |
| 198.202.254.0/24 | 256 | ARIN | US | 21st Oct 1993 |
| 198.202.255.0/24 | 256 | ARIN | US | 11th Dec 2012 |
| 198.202.32.0/22 | 1k | ARIN | US | 25th Oct 1993 |
| 198.202.36.0/22 | 1k | ARIN | US | 25th Oct 1993 |
| 198.202.40.0/22 | 1k | ARIN | US | 25th Oct 1993 |
| 198.202.44.0/24 | 256 | ARIN | US | 25th Oct 1993 |
| 198.202.45.0/24 | 256 | ARIN | US | 25th Oct 1993 |
| 198.202.46.0/23 | 512 | ARIN | US | 25th Oct 1993 |
| 198.202.48.0/23 | 512 | ARIN | US | 25th Oct 1993 |
| 198.202.50.0/23 | 512 | ARIN | US | 9th Dec 1993 |
| 198.202.52.0/22 | 1k | ARIN | US | 9th Dec 1993 |
| 198.202.56.0/21 | 2k | ARIN | US | 9th Dec 1993 |