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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,149 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.207.62.0/24 | 256 | ARIN |  US | 9th Sept 2015 |
| 192.207.63.0/24 | 256 | ARIN | US | 20th Aug 1992 |
| 192.207.65.0/24 | 256 | LACNIC |  EC | 20th Aug 1992 |
| 192.207.68.0/24 | 256 | LACNIC | EC | 20th Aug 1992 |
| 192.207.69.0/24 | 256 | ARIN | US | 20th Aug 1992 |
| 192.207.70.0/23 | 512 | ARIN | US | 20th Aug 1992 |
| 192.207.72.0/24 | 256 | ARIN | US | 20th Aug 1992 |
| 192.207.75.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.8.0/22 | 1k | ARIN | US | 12th Aug 1992 |
| 192.207.82.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.83.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.84.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.85.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.86.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.87.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.88.0/24 | 256 | ARIN | US | 4th Apr 1994 |
| 192.207.89.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.90.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.92.0/23 | 512 | ARIN | US | 21st Aug 1992 |
| 192.207.94.0/24 | 256 | ARIN | US | 21st Aug 1992 |
| 192.207.95.0/24 | 256 | ARIN | US | 25th Aug 1992 |
| 192.208.0.0/24 | 256 | ARIN | US | 20th Aug 2015 |
| 192.208.112.0/23 | 512 | ARIN | US | 29th Aug 1992 |
| 192.208.158.0/23 | 512 | ARIN | US | 24th Apr 2015 |
| 192.208.48.0/22 | 1k | ARIN | US | 26th Aug 1992 |
| 192.208.64.0/19 | 8.2k | ARIN | US | 29th Aug 1992 |
| 192.208.96.0/20 | 4.1k | ARIN | US | 29th Aug 1992 |
| 192.209.1.0/24 | 256 | ARIN | US | 14th Aug 1992 |
| 192.209.128.0/17 | 32.8k | ARIN | US | 19th Jul 1993 |
| 192.209.16.0/24 | 256 | ARIN | US | 14th Aug 1992 |
| 192.209.2.0/23 | 512 | ARIN | US | 14th Aug 1992 |
| 192.209.4.0/22 | 1k | ARIN | US | 14th Aug 1992 |
| 192.209.64.0/18 | 16.4k | ARIN | US | 14th Aug 1992 |
| 192.209.8.0/21 | 2k | ARIN | US | 14th Aug 1992 |
| 192.21.0.0/16 | 65.5k | RIPE NCC |  SE | 22nd Jan 1986 |
| 192.210.1.0/24 | 256 | ARIN |  CA | 26th Aug 1992 |
| 192.210.2.0/23 | 512 | ARIN | CA | 26th Aug 1992 |
| 192.210.32.0/21 | 2k | ARIN | US | 28th Aug 1992 |
| 192.210.40.0/23 | 512 | ARIN | US | 28th Aug 1992 |
| 192.210.64.0/18 | 16.4k | ARIN | CA | 28th Sept 1992 |
| 192.211.64.0/19 | 8.2k | ARIN | US | 18th Aug 1992 |
| 192.211.96.0/20 | 4.1k | ARIN | US | 18th Aug 1992 |
| 192.214.97.0/24 | 256 | ARIN | US | 31st Jul 2015 |
| 192.214.98.0/23 | 512 | ARIN | US | 28th Apr 2015 |
| 192.219.100.0/24 | 256 | ARIN | CA | 18th Mar 1993 |
| 192.219.101.0/24 | 256 | ARIN | CA | 18th Mar 1993 |
| 192.219.102.0/24 | 256 | ARIN | CA | 18th Mar 1993 |
| 192.219.103.0/24 | 256 | ARIN | CA | 18th Mar 1993 |
| 192.219.104.0/24 | 256 | ARIN | CA | 22nd Mar 1993 |
| 192.219.105.0/24 | 256 | ARIN | CA | 23rd Mar 1993 |