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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,310 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 200.14.118.0/24 | 256 | LACNIC |  CL | 21st Mar 1995 |
| 200.14.34.0/24 | 256 | LACNIC |  EC | 28th Dec 2006 |
| 200.14.38.0/24 | 256 | LACNIC |  AR | 9th Nov 2010 |
| 200.14.39.0/24 | 256 | LACNIC | AR | 9th Nov 2010 |
| 200.14.64.0/24 | 256 | LACNIC | CL | 27th Sept 1994 |
| 200.14.65.0/24 | 256 | LACNIC | CL | 27th Sept 1994 |
| 200.14.72.0/24 | 256 | LACNIC | CL | 2nd Nov 1994 |
| 200.14.73.0/24 | 256 | LACNIC | CL | 7th Nov 1994 |
| 200.14.75.0/24 | 256 | LACNIC | AR | 9th Nov 2010 |
| 200.14.76.0/23 | 512 | LACNIC | CL | 7th Nov 1994 |
| 200.14.78.0/24 | 256 | LACNIC | CL | 7th Nov 1994 |
| 200.14.8.0/21 | 2k | LACNIC |  VE | 1st Mar 1994 |
| 200.14.83.0/24 | 256 | LACNIC | EC | 30th Jun 2011 |
| 200.14.92.0/24 | 256 | LACNIC | CL | 30th Nov 1994 |
| 200.14.93.0/24 | 256 | LACNIC | CL | 30th Nov 1994 |
| 200.14.94.0/24 | 256 | LACNIC | CL | 30th Nov 1994 |
| 200.14.95.0/24 | 256 | LACNIC | CL | 30th Nov 1994 |
| 200.14.98.0/24 | 256 | LACNIC | CL | 3rd Feb 1995 |
| 200.14.99.0/24 | 256 | LACNIC | CL | 3rd Feb 1995 |
| 200.141.48.0/20 | 4.1k | RIPE NCC |  AE | 13th Mar 2025 |
| 200.149.176.0/20 | 4.1k | RIPE NCC | AE | 13th Mar 2025 |
| 200.154.0.0/16 | 65.5k | LACNIC |  BR | 28th Aug 2001 |
| 200.16.64.0/24 | 256 | LACNIC | AR | 27th Sept 1994 |
| 200.16.65.0/24 | 256 | LACNIC | AR | 12th Jan 1995 |
| 200.16.76.0/23 | 512 | LACNIC | AR | 12th Jan 1995 |
| 200.16.84.0/24 | 256 | LACNIC | AR | 21st Mar 1995 |
| 200.16.85.0/24 | 256 | LACNIC | AR | 21st Mar 1995 |
| 200.16.87.0/24 | 256 | LACNIC | AR | 21st Mar 1995 |
| 200.16.88.0/24 | 256 | ARIN |  US | 31st Mar 1995 |
| 200.163.80.0/20 | 4.1k | RIPE NCC | US | 13th Mar 2025 |
| 200.169.176.0/20 | 4.1k | RIPE NCC | US | 13th Mar 2025 |
| 200.169.80.0/20 | 4.1k | LACNIC | BR | 18th Jun 2001 |
| 200.170.0.0/18 | 16.4k | LACNIC | BR | 20th Apr 2001 |
| 200.18.20.0/22 | 1k | LACNIC | BR | 16th Feb 2000 |
| 200.18.224.0/20 | 4.1k | LACNIC | BR | 16th Feb 2000 |
| 200.18.24.0/21 | 2k | LACNIC | BR | 16th Feb 2000 |
| 200.181.80.0/20 | 4.1k | RIPE NCC | US | 13th Mar 2025 |
| 200.187.96.0/22 | 1k | LACNIC | BR | 7th May 2020 |
| 200.188.192.0/20 | 4.1k | LACNIC | BR | 1st Mar 2001 |
| 200.189.42.0/23 | 512 | LACNIC | BR | 29th Apr 2014 |
| 200.189.68.0/22 | 1k | LACNIC |  MX | 26th Jun 2024 |
| 200.19.8.0/21 | 2k | LACNIC | BR | 16th Feb 2000 |
| 200.192.108.0/22 | 1k | LACNIC | BR | 19th Nov 2009 |
| 200.192.176.0/20 | 4.1k | LACNIC | BR | 12th Nov 1999 |
| 200.192.192.0/20 | 4.1k | LACNIC | BR | 19th Jul 2000 |
| 200.192.234.0/24 | 256 | LACNIC | BR | 6th Aug 2015 |
| 200.192.235.0/24 | 256 | LACNIC | BR | 6th Aug 2015 |
| 200.194.0.0/18 | 16.4k | LACNIC | MX | 12th Jun 2014 |
| 200.196.96.0/19 | 8.2k | LACNIC | BR | 25th Jan 2001 |
| 200.2.104.0/21 | 2k | LACNIC | CL | 5th Dec 1995 |