Area Codes Phone Directory 240-423

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State	Major City	Time Zone
Maryland	Baltimore	Eastern

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Example: (240) 423-5555 or 2012145555

Prefix	Primary City	Company	County	Usage	Introduced
240-423	Silver Spring, MD	Omnipoint Communications Cap Operations	Montgomery	Cell Number	05/21/2001

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240-4230###

240-4231###

240-4232###

240-4233###

240-4234###

240-4235###

240-4236###

240-4237###

240-4238###

240-4239###