Mount Vernon, Illinois
Central Time Zone (UTC-6) · IL · —
About Area Codes in Mount Vernon, Illinois
Mount Vernon, Illinois is served by 2 area codes: 618, 730. When multiple area codes serve the same geographic area, it typically indicates overlay codes have been added to accommodate growing demand for phone numbers. All local calls within Mount Vernon require 10-digit dialing. The city is in the Central time zone (UTC-6).
Other cities in area code 618
Frequently Asked Questions
What area code is Mount Vernon, Illinois?
Mount Vernon, Illinois uses area codes 618 and 730.
What time zone is Mount Vernon in?
Mount Vernon is in the Central time zone (UTC-6).
Do I need to dial 10 digits when calling Mount Vernon?
Yes, all local calls in Mount Vernon require 10-digit dialing because the area is served by multiple overlay area codes.
When was area code 618 created?
Area code 618 is one of the original 86 area codes established in 1947 as part of the North American Numbering Plan (NANP).
What cities share area code 618 with Mount Vernon?
Other cities sharing area code 618 with Mount Vernon include Alton, Belleville, Carbondale, Collinsville, East St. Louis, among others.
Also called Mount Vernon:
Mount Vernon, IL · Central Time Zone