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← Area code 972

972-421 phone numbers

Numbers 972-421-0000 to 972-421-9999 are assigned to Level 3 of Telecom of Texas, LLC in Dallas, TX. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 972-421