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← Area code 540

540-340 phone numbers

Numbers 540-340-0000 to 540-340-9999 are assigned to Onvoy, LLC in Warrenton, VA. 4 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 540-340