prefixcheck.com
prefixcheck.com is a live English-language website hosted on Amazon.com, Inc. (AS16509) in the United States, served by Vercel. cl0q first saw it on 2026-08-16 and last crawled it on 2026-08-16. It resolves to 76.76.21.21 and has mail (MX) records set up. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.
How the site describes itself:
PrefixCheck — Check the prefix.
Operator-grade reference for the global container stack. ISO 6346 check digit, four-character size and type, CSC plate, container door anatomy, owner prefix universe, UN/LOCODE. Browser-based tools, iPhone scanner in TestFlight.
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-08-16 |
| Last crawled | 2026-08-16 |
| IPv4 | 76.76.21.21 |
| Network | AS16509 Amazon.com, Inc. · California |
| Mail (MX) | route3.mx.cloudflare.net,route1.mx.cloudflare.net,route2.mx.cloudflare.net |
| Language | en |
| Server | Vercel |