https://www.npanxxsource.com/
NPA NXX Telephone Area Code / Prefix and Exchange Databases
United States and Canadian NPA NXX area code prefix, local calling areas and wireless telephone number identification reference databases updated monthly.
telephone area codenpa nxxprefixexchangedatabases
https://www.area-codes.com/
NPA NXX Area Code Database List Directory with Exchanges
npa nxxarea codedatabase listdirectoryexchanges