The title for this is incorrectly applying the public suffix list (https://publicsuffix.org/) and comes up with "tx.us". That's not the registered domain name here.
// The registrar notes several more specific domains available in each state,
// such as state.*.us, dst.*.us, etc., but resolution of these is somewhat
// haphazard; in some states these domains resolve as addresses, while in others
// only subdomains are available, or even nothing at all. We include the
// most common ones where it's clear that different sites are different
// entities.