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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.96.40.0/24 | 256 | AFRINIC |  ZA | 15th Jun 1992 |
| 192.96.43.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.45.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.47.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.48.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.49.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.50.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.51.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.52.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.53.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.54.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.55.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.56.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.58.0/24 | 256 | AFRINIC | ZA | 17th Mar 2003 |
| 192.96.59.0/24 | 256 | ARIN |  US | 18th Feb 2015 |
| 192.96.6.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.60.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.61.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.68.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.69.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.70.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.71.0/24 | 256 | AFRINIC | ZA | 15th Jun 1992 |
| 192.96.72.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.74.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.75.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.76.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.77.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.78.0/24 | 256 | ARIN |  CA | 18th Feb 2015 |
| 192.96.79.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.80.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.81.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.82.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.83.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.84.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.85.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.86.0/24 | 256 | AFRINIC | ZA | 23rd Jul 1992 |
| 192.96.87.0/24 | 256 | AFRINIC | ZA | 12th Aug 1992 |
| 192.96.88.0/24 | 256 | AFRINIC | ZA | 12th Aug 1992 |
| 192.96.9.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.93.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.97.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.98.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.99.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.97.0.0/16 | 65.5k | ARIN | US | 5th Mar 1991 |
| 193.0.129.0/24 | 256 | RIPE NCC | US | 12th Nov 2019 |
| 193.0.144.0/24 | 256 | RIPE NCC |  PL | 27th Apr 2012 |
| 193.0.166.0/23 | 512 | RIPE NCC |  RU | 9th Aug 2012 |
| 193.0.184.0/24 | 256 | RIPE NCC | US | 12th Nov 2019 |
| 193.0.198.0/24 | 256 | RIPE NCC |  DE | 7th Dec 2020 |
| 193.0.212.0/24 | 256 | RIPE NCC | US | 12th Nov 2019 |