Area code 908 is atelephonearea code in theNorth American Numbering Plan (NANP) in thenorthern part of theU.S. state ofNew Jersey. The numbering plan area (NPA) comprises communities inUnion County,Somerset County, northern parts ofMiddlesex County,Hunterdon County,Warren County, and parts ofMorris County as well as some cell phones inMonmouth andOcean Counties.

Area code 201, originally the only area code for New Jersey when the first nationwidetelephone numbering plan was created in 1947, had been the area code for all of northern and central New Jersey since 1956.

In June 1989, New Jersey Bell announced a split of numbering plan area 201 to create a new area code, 908, in North Jersey. During a permissive dialing period, which ended on June 8, 1991, existing telephone numbers in the service area could be dialed with area codes 201 or 908.^[1][2][3] Customers in the remaining 201 area had to prefix existing and new numbers in 908 with 1-908. At the time of the split, 1.5 million access lines were served by the new area code.^{[citation needed]}

On January 1, 1997, 908 was reduced to its western portion, formingarea code 732 in the central-eastern region of New Jersey.^[4] It was the penultimate area code added in the X0X format when909 was added a year later in California.

Middlesex County is largely 908 inSouth Plainfield and parts ofEdison (particularly Inman Avenue and north of Oak Tree Road) andPiscataway (particularly the New Market area nearPlainfield). 908 and theDelaware Valley's856 are the only area codes in the state that have yet to be overlaid.

Before October 2021, area code 908 had telephone numbers assigned for thecentral office code 988. In 2020,988 was designated nationwide as a dialing code for theNational Suicide Prevention Lifeline, which created a conflict for exchanges that permitseven-digit dialing. This area code was therefore scheduled to transition toten-digit dialing by October 24, 2021.^[5]

• List of New Jersey area codes
• List of North American Numbering Plan area codes

• "Area Code Maps".North American Numbering Plan Administrator.

40°28′28″N74°25′33″W / 40.4744°N 74.4258°W /40.4744; -74.4258

• Area codes in New Jersey
• Area codes in the United States

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