"I skimmed the post but couldn't find out how one would know what provider to use." I personally do carrier lookups in the unix shell with a 'curl' command usi

"I skimmed the post but couldn't find out how one would know what provider to use." I personally do carrier lookups in the unix shell with a 'curl' command using the Twilio API (see my other comment under you). However, you can just look this information up on a number of different websites: https://www.freecarrierlookup.com/ https://www.freecarrierlookup.com/ ... et. al ...