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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.96.164.0/24 | 256 | AFRINIC |  ZA | 21st Jan 1993 |
| 192.96.165.0/24 | 256 | AFRINIC | ZA | 21st Jan 1993 |
| 192.96.166.0/24 | 256 | AFRINIC | ZA | 21st Jan 1993 |
| 192.96.167.0/24 | 256 | AFRINIC | ZA | 21st Jan 1993 |
| 192.96.178.0/24 | 256 | AFRINIC | ZA | 21st Jan 1993 |
| 192.96.179.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.180.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.181.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.182.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.183.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.184.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.185.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.186.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.187.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.188.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.189.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.19.0/24 | 256 | AFRINIC | ZA | 18th Jun 1992 |
| 192.96.190.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.191.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.194.0/24 | 256 | AFRINIC | ZA | 24th Oct 2002 |
| 192.96.195.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.196.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.197.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.198.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.199.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.224.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.225.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.226.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.227.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.228.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.229.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.23.0/24 | 256 | ARIN |  US | 12th Feb 2015 |
| 192.96.230.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.231.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.232.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.237.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 192.96.242.0/24 | 256 | AFRINIC | ZA | 5th May 1993 |
| 192.96.245.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.246.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.253.0/24 | 256 | AFRINIC | ZA | 6th May 1993 |
| 192.96.254.0/24 | 256 | AFRINIC | ZA | 28th Oct 2002 |
| 192.96.3.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.32.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.33.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.34.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.35.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.36.0/24 | 256 | ARIN | US | 17th Feb 2015 |
| 192.96.37.0/24 | 256 | AFRINIC | ZA | 26th Nov 2015 |
| 192.96.39.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.4.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |