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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
671 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 200.33.17.0/24 | 256 | LACNIC |  MX | 1st Apr 1996 |
| 200.33.170.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.33.172.0/24 | 256 | LACNIC | MX | 4th Jun 1996 |
| 200.33.173.0/24 | 256 | LACNIC | MX | 7th Aug 1996 |
| 200.33.176.0/24 | 256 | LACNIC | MX | 9th Aug 1996 |
| 200.33.177.0/24 | 256 | LACNIC | MX | 13th Aug 1996 |
| 200.33.179.0/24 | 256 | LACNIC | MX | 13th Aug 1996 |
| 200.33.180.0/24 | 256 | LACNIC | MX | 20th Aug 1996 |
| 200.33.181.0/24 | 256 | LACNIC | MX | 15th Aug 1996 |
| 200.33.183.0/24 | 256 | LACNIC | MX | 18th Aug 1996 |
| 200.33.184.0/24 | 256 | LACNIC | MX | 18th Aug 1996 |
| 200.33.185.0/24 | 256 | LACNIC | MX | 20th Aug 1996 |
| 200.33.187.0/24 | 256 | LACNIC | MX | 8th May 1997 |
| 200.33.19.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.33.2.0/24 | 256 | LACNIC | MX | 16th Jun 1997 |
| 200.33.204.0/24 | 256 | LACNIC | MX | 18th Aug 1996 |
| 200.33.205.0/24 | 256 | LACNIC | MX | 18th Aug 1996 |
| 200.33.207.0/24 | 256 | LACNIC | MX | 22nd Aug 1996 |
| 200.33.21.0/24 | 256 | LACNIC | MX | 22nd Apr 1996 |
| 200.33.22.0/24 | 256 | LACNIC | MX | 24th Apr 1996 |
| 200.33.23.0/24 | 256 | LACNIC | MX | 30th Apr 1996 |
| 200.33.236.0/23 | 512 | LACNIC | MX | 15th Aug 1996 |
| 200.33.238.0/23 | 512 | LACNIC | MX | 20th Dec 1997 |
| 200.33.24.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.33.248.0/24 | 256 | LACNIC | MX | 26th Aug 1996 |
| 200.33.250.0/24 | 256 | LACNIC | MX | 26th Aug 1996 |
| 200.33.251.0/24 | 256 | LACNIC | MX | 26th Aug 1996 |
| 200.33.254.0/24 | 256 | LACNIC | MX | 28th Aug 1996 |
| 200.33.255.0/24 | 256 | LACNIC | MX | 29th Apr 1999 |
| 200.33.29.0/24 | 256 | LACNIC | MX | 2nd Jun 1996 |
| 200.33.32.0/24 | 256 | LACNIC | MX | 4th Jun 1996 |
| 200.33.33.0/24 | 256 | LACNIC | MX | 4th Jun 1996 |
| 200.33.34.0/24 | 256 | LACNIC | MX | 11th Jun 1996 |
| 200.33.35.0/24 | 256 | LACNIC | MX | 15th Jun 1996 |
| 200.33.36.0/24 | 256 | LACNIC | MX | 1st Jul 1996 |
| 200.33.37.0/24 | 256 | LACNIC | MX | 1st Jul 1996 |
| 200.33.38.0/24 | 256 | LACNIC | MX | 30th Jun 1996 |
| 200.33.39.0/24 | 256 | LACNIC | MX | 30th Jun 1996 |
| 200.33.41.0/24 | 256 | LACNIC | MX | 30th Jun 1996 |
| 200.33.43.0/24 | 256 | LACNIC | MX | 7th Jul 1996 |
| 200.33.44.0/24 | 256 | LACNIC | MX | 7th Jul 1996 |
| 200.33.45.0/24 | 256 | LACNIC | MX | 7th Jul 1996 |
| 200.33.46.0/24 | 256 | LACNIC | MX | 9th Jul 1996 |
| 200.33.47.0/24 | 256 | LACNIC | MX | 9th Jul 1996 |
| 200.33.49.0/24 | 256 | LACNIC | MX | 11th Jul 1996 |
| 200.33.5.0/24 | 256 | LACNIC | MX | 19th Jun 1996 |
| 200.33.50.0/24 | 256 | LACNIC | MX | 11th Jul 1996 |
| 200.33.52.0/24 | 256 | LACNIC | MX | 17th Jul 1996 |
| 200.33.53.0/24 | 256 | LACNIC | MX | 17th Jul 1996 |
| 200.33.54.0/24 | 256 | LACNIC | MX | 17th Jul 1996 |