Earlier quoted context omitted.
run a search at broadbandnow.com, see what you get
broadbandnow.com isn't fine-grained enough to be trusted. For my zip code they list AT&T UVerse, AT&T DSL, Cox and Time Warner. The reality of my actual address is that my only options are Time Warner and AT&T DSL (old school fully copper DSL, not UVerse). I'm positive these are my only wired options because I have researched this extensively (including actually calling the companies, not just relying on bad Internet…
Also the information blurb at the bottom says I have a fiber provider, but none are listed.
Finally, it's missing some local providers which I am positive exist; our local power/water provider also provides Ethernet to local business and some residential areas, but it's not listed.