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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.94.79.0/24 | 256 | ARIN |  US | 22nd Feb 1991 |
| 192.94.8.0/24 | 256 | ARIN | US | 7th Feb 1991 |
| 192.94.80.0/24 | 256 | ARIN | US | 22nd Feb 1991 |
| 192.94.81.0/24 | 256 | ARIN | US | 22nd Feb 1991 |
| 192.94.82.0/23 | 512 | ARIN | US | 22nd Feb 1991 |
| 192.94.84.0/22 | 1k | ARIN | US | 22nd Feb 1991 |
| 192.94.88.0/22 | 1k | ARIN | US | 22nd Feb 1991 |
| 192.94.9.0/24 | 256 | ARIN | US | 7th Feb 1991 |
| 192.94.94.0/24 | 256 | ARIN | US | 22nd Feb 1991 |
| 192.94.95.0/24 | 256 | ARIN | US | 22nd Feb 1991 |
| 192.94.96.0/22 | 1k | ARIN | US | 22nd Feb 1991 |
| 192.96.10.0/24 | 256 | AFRINIC |  ZA | 17th Jun 1992 |
| 192.96.100.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.101.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.102.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.104.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.105.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.106.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.107.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.108.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.11.0/24 | 256 | AFRINIC | ZA | 11th Mar 1992 |
| 192.96.110.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.111.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.112.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.113.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.114.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.115.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.116.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.117.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.118.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.119.0/24 | 256 | AFRINIC | ZA | 29th Mar 1993 |
| 192.96.12.0/24 | 256 | AFRINIC | ZA | 11th Mar 1992 |
| 192.96.13.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.135.0/24 | 256 | ARIN | US | 6th Oct 2025 |
| 192.96.138.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.14.0/24 | 256 | AFRINIC | ZA | 17th Jun 1992 |
| 192.96.144.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.146.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.147.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.148.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.149.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.150.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.151.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.152.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.153.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.154.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.155.0/24 | 256 | AFRINIC | ZA | 30th Mar 1993 |
| 192.96.158.0/24 | 256 | AFRINIC | ZA | 21st Jan 1993 |
| 192.96.16.0/24 | 256 | AFRINIC | ZA | 18th Jun 1992 |
| 192.96.160.0/22 | 1k | ARIN | US | 11th Jan 2013 |