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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Mexico
666 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 138.204.204.0/22 | 1k | LACNIC |  MX | 10th Aug 2015 |
| 148.222.188.0/22 | 1k | LACNIC | MX | 21st Dec 1992 |
| 148.224.30.0/24 | 256 | LACNIC | MX | 21st May 1993 |
| 148.224.40.0/22 | 1k | LACNIC | MX | 21st May 1993 |
| 148.224.47.0/24 | 256 | LACNIC | MX | 21st May 1993 |
| 148.224.52.0/22 | 1k | LACNIC | MX | 21st May 1993 |
| 148.227.128.0/19 | 8.2k | LACNIC | MX | 26th Dec 1997 |
| 148.227.160.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 148.227.164.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 148.227.166.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 148.227.168.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 148.227.171.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 148.227.176.0/20 | 4.1k | LACNIC | MX | 26th Dec 1997 |
| 148.227.192.0/20 | 4.1k | LACNIC | MX | 26th Dec 1997 |
| 148.227.224.0/19 | 8.2k | LACNIC | MX | 26th Dec 1997 |
| 148.242.0.0/16 | 65.5k | LACNIC | MX | 10th Oct 2000 |
| 148.248.0.0/16 | 65.5k | LACNIC | MX | 1st Sept 1994 |
| 168.196.3.0/24 | 256 | LACNIC | MX | 19th Aug 2016 |
| 170.238.220.0/22 | 1k | LACNIC | MX | 11th Nov 2016 |
| 170.84.188.0/22 | 1k | LACNIC | MX | 7th Jun 2016 |
| 177.21.144.0/22 | 1k | LACNIC | MX | 24th Feb 2025 |
| 177.234.0.0/17 | 32.8k | LACNIC | MX | 13th Sept 2013 |
| 181.199.192.0/20 | 4.1k | LACNIC | MX | 23rd Jul 2013 |
| 187.165.0.0/16 | 65.5k | LACNIC | MX | 11th Jul 2011 |
| 187.166.0.0/15 | 131k | LACNIC | MX | 11th Jul 2011 |
| 187.179.160.0/19 | 8.2k | LACNIC | MX | 27th Jul 2010 |
| 187.179.192.0/18 | 16.4k | LACNIC | MX | 27th Jul 2010 |
| 187.191.128.0/17 | 32.8k | LACNIC | MX | 12th Jun 2014 |
| 187.251.32.0/19 | 8.2k | LACNIC | MX | 29th Nov 2012 |
| 189.201.246.0/24 | 256 | LACNIC | MX | 6th Aug 2007 |
| 189.201.247.0/24 | 256 | LACNIC | MX | 6th Aug 2007 |
| 189.51.172.0/22 | 1k | LACNIC | MX | 17th Jun 2020 |
| 190.103.32.0/20 | 4.1k | LACNIC | MX | 7th Jul 2026 |
| 190.110.0.0/19 | 8.2k | LACNIC | MX | 10th Sept 2008 |
| 190.2.191.0/24 | 256 | LACNIC | MX | 21st Jul 2026 |
| 191.52.220.0/22 | 1k | LACNIC | MX | 11th Jun 2020 |
| 192.100.155.0/24 | 256 | LACNIC | MX | 22nd Apr 1991 |
| 192.100.156.0/24 | 256 | LACNIC | MX | 22nd Apr 1991 |
| 192.100.158.0/24 | 256 | LACNIC | MX | 19th Mar 1992 |
| 192.100.160.0/24 | 256 | LACNIC | MX | 21st Dec 1992 |
| 192.100.167.0/24 | 256 | LACNIC | MX | 21st Dec 1992 |
| 192.100.174.0/24 | 256 | LACNIC | MX | 29th Jan 1993 |
| 192.100.178.0/24 | 256 | LACNIC | MX | 29th Jan 1993 |
| 192.100.183.0/24 | 256 | LACNIC | MX | 6th Dec 1993 |
| 192.100.184.0/23 | 512 | LACNIC | MX | 28th Apr 1993 |
| 192.100.190.0/24 | 256 | LACNIC | MX | 21st Apr 1994 |
| 192.100.203.0/24 | 256 | LACNIC | MX | 16th Feb 1994 |
| 192.100.205.0/24 | 256 | LACNIC | MX | 24th Feb 1994 |
| 192.100.207.0/24 | 256 | LACNIC | MX | 14th Mar 1994 |
| 192.100.209.0/24 | 256 | LACNIC | MX | 14th Mar 1994 |