About this number
(610) 402 is a landline based telephone number operated by Ctsi, Inc. - Pa and is located in zip code 18101 in the city of Allentown, Pennsylvania, which is in Lehigh County, and is in the Northeast. It has a Number Planning Area (NPA - also known as an Area Code) of 610 and Network Numbering Exchange (NXX - also known as a prefix) of 402. It has an Operating Company Number (OCN) of 7513. A Common Language Location Identifier (CLLI) of ALTWPAALDS0. As well as a Local access and transport area (LATA) of 228. Zip code 18101 has a population of 3,897 as of the 2010 census.