Still would nice to have a database of US and other global locations
> with who services them and what technology.
It may not be official but if you go to
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they have interactive google maps of areas with red balloons where towers are. Clicking on a balloon will show you who it belongs to. From what I understand it won't show everything except towers that are registered with the FCC. Also take into account that it may not be listed as its present name e.g. it may say something like VoiceStream I LLC instead of T-Mobile or it might say Airtouch LLC instead of Verizon. Also mobile operators sometimes "aggregate" with other operators on a single tower being run by someone who owns the tower.