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← Area code 425

425-678 phone numbers

Numbers 425-678-0000 to 425-678-9999 are assigned to Level 3 Telecom of Washington, LLC (rate centre HALLS LAKE, WA, NANPA abbreviation). 8 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 425-678