Non-geographic area codes for personal communication services(en.wikipedia.org)
en.wikipedia.org
Non-geographic area codes for personal communication services
https://en.wikipedia.org/wiki/Personal_communications_service_(NANP)
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TIL Area Code 529 has been designated as a general purpose code to communicate with fixed and mobile devices, including unattended devices. Examples are database systems and back office control systems. It is not assigned to a geographic area. Area code 529 was put into service on September 16, 2022.