Numbers with prefix 667 in United States
In United States's numbering plan, the area code 667 covers Maryland. It identifies where a line was allocated, not who is calling: numbers are portable and caller ID can be spoofed, so the digits alone do not identify the caller.
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Numbers reported with prefix 667
74 numbersAbout numbers 667
Numbers starting with 667 are landlines in United States. They are assigned geographically. Sales calls from landlines are common, especially from telecom and energy companies.
Official source and review
Google libphonenumber (compiled from national numbering plans) · Document: 2026-08-28 · Reviewed: 2026-08-31
A prefix describes an official allocation. Portability and caller-ID spoofing mean it cannot identify the caller on its own.