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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,256 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 198.49.164.0/24 | 256 | LACNIC |  CR | 19th Feb 1993 |
| 198.49.165.0/24 | 256 | ARIN |  US | 22nd Feb 1993 |
| 198.49.166.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.168.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.169.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.170.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.171.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.172.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.173.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.174.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.175.0/24 | 256 | ARIN |  CA | 22nd Feb 1993 |
| 198.49.176.0/24 | 256 | ARIN | US | 9th Jun 1997 |
| 198.49.179.0/24 | 256 | ARIN | US | 24th Feb 1993 |
| 198.49.181.0/24 | 256 | ARIN | US | 24th Feb 1993 |
| 198.49.192.0/24 | 256 | ARIN | US | 27th Feb 1993 |
| 198.49.195.0/24 | 256 | ARIN | US | 27th Feb 1993 |
| 198.49.196.0/24 | 256 | ARIN | US | 27th Feb 1993 |
| 198.49.197.0/24 | 256 | ARIN | US | 1st Mar 1993 |
| 198.49.198.0/24 | 256 | ARIN | US | 2nd Mar 1993 |
| 198.49.199.0/24 | 256 | ARIN | US | 2nd Mar 1993 |
| 198.49.2.0/24 | 256 | APNIC |  AU | 3rd Feb 2011 |
| 198.49.20.0/24 | 256 | ARIN | US | 27th Jan 1993 |
| 198.49.200.0/24 | 256 | ARIN | US | 12th Apr 2022 |
| 198.49.201.0/24 | 256 | ARIN | US | 2nd Mar 1993 |
| 198.49.202.0/24 | 256 | ARIN | US | 2nd Mar 1993 |
| 198.49.209.0/24 | 256 | ARIN | US | 2nd Mar 1993 |
| 198.49.21.0/24 | 256 | ARIN | US | 22nd Feb 1993 |
| 198.49.210.0/24 | 256 | ARIN | US | 2nd Mar 1993 |
| 198.49.211.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.49.212.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.49.213.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.49.215.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.49.216.0/24 | 256 | ARIN | US | 4th Mar 1993 |
| 198.49.218.0/24 | 256 | ARIN | US | 4th Mar 1993 |
| 198.49.220.0/24 | 256 | ARIN | US | 4th Mar 1993 |
| 198.49.221.0/24 | 256 | ARIN | US | 4th Mar 1993 |
| 198.49.223.0/24 | 256 | ARIN | US | 4th Mar 1993 |
| 198.49.224.0/24 | 256 | ARIN | US | 4th Mar 1993 |
| 198.49.225.0/24 | 256 | ARIN | US | 4th Mar 1993 |
| 198.49.226.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.227.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.228.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.229.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.230.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.231.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.232.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.233.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.234.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.49.235.0/24 | 256 | ARIN | US | 8th Mar 1993 |
| 198.49.236.0/24 | 256 | ARIN | US | 8th Mar 1993 |