About this number
(443) 603 is a landline based telephone number operated by Paetec Communications, Inc. - and is located in zip code 21202 in the city of Baltimore, Maryland, which is in Baltimore County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 443 and Network Numbering Exchange (NXX - also known as a prefix) of 603. It has an Operating Company Number (OCN) of 4716. A Common Language Location Identifier (CLLI) of BLTMMDCHW29. As well as a Local access and transport area (LATA) of 238. Zip code 21202 has a population of 22,832 as of the 2010 census.