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NDC: 603

This is the National Destination Code(NDC):603 page list. Its detail is as below.
Area code 603 is one of the original 86 area codes created by AT&T and the Bell System in 1947. It originally served the entire state of New Hampshire. To avoid exhausting all possible phone numbers in this area code, relief planning has begun. Currently, it covers the entire state of New Hampshire, and it overlaps coverage areas with area code .
Prefix State Primary city Usage Carrier
(603) 309- New Hampshire Newport Wireless Bell Atlantic Nynex Mobile
(603) 310- New Hampshire Bedford Landline Ctc Communications Corp.
(603) 312- New Hampshire Dover Wireless Bell Atlantic Nynex Mobile
(603) 313- New Hampshire Keene Wireless United States Cellular Corp. - New Hampshire
(603) 314- New Hampshire Manchester Landline Lightship Telecom
(603) 315- New Hampshire Manchester Wireless Bell Atlantic Nynex Mobile
(603) 317- New Hampshire Milan Landline Brooks Fiber Communications Of New Hampshire
(603) 318- New Hampshire Nashua Landline Bell Atlantic Nynex Mobile
(603) 319- New Hampshire Portsmouth Landline Lightship Telecom
(603) 320- New Hampshire Nashua Wireless New Cingular Wireless PCS - DC
(603) 321- New Hampshire Nashua Wireless Bell Atlantic Nynex Mobile
(603) 322- New Hampshire W Lebanon Wireless New Cingular Wireless PCS - DC
(603) 323- New Hampshire Tamworth Landline No New England Tel Op DBA Fairpoint Comm
(603) 324- New Hampshire Nashua Landline Brooks Fiber Communications Of New Hampshire
(603) 325- New Hampshire Manchester Landline Brooks Fiber Communications Of New Hampshire
(603) 326- New Hampshire Berlin Landline Level 3 Communications
(603) 327- New Hampshire Salem Landline Lightship Telecom
(603) 328- New Hampshire Salem Landline Paetec Communications
(603) 329- New Hampshire Hampstead Landline No New England Tel Op DBA Fairpoint Comm
(603) 330- New Hampshire Rochester Landline No New England Tel Op DBA Fairpoint Comm
(603) 331- New Hampshire Colebrook Landline Level 3 Communications
(603) 332- New Hampshire Rochester Landline No New England Tel Op DBA Fairpoint Comm
(603) 334- New Hampshire Portsmouth Landline No New England Tel Op DBA Fairpoint Comm
(603) 335- New Hampshire Rochester Landline No New England Tel Op DBA Fairpoint Comm
(603) 336- New Hampshire Hinsdale Landline No New England Tel Op DBA Fairpoint Comm
(603) 337- New Hampshire Rochester Landline No New England Tel Op DBA Fairpoint Comm
(603) 338- New Hampshire Keene Landline Brooks Fiber Communications Of New Hampshire
(603) 339- New Hampshire Derry Wireless New Cingular Wireless PCS - DC
(603) 340- New Hampshire Suncook Wireless Bell Atlantic Nynex Mobile
(603) 341- New Hampshire Merrimack Wireless United States Cellular Corp. - New Hampshire
(603) 342- New Hampshire Berlin Landline No New England Tel Op DBA Fairpoint Comm
(603) 343- New Hampshire Dover Landline Comcast Phone Of New Hampshire
(603) 344- New Hampshire Suncook Wireless United States Cellular Corp. - New Hampshire
(603) 345- New Hampshire Merrimack Wireless United States Cellular Corp. - New Hampshire
(603) 346- New Hampshire Plymouth Landline Level 3 Communications
(603) 347- New Hampshire Kingston Landline Comcast Phone Of New Hampshire
(603) 348- New Hampshire N Woodstock Wireless United States Cellular Corp. - New Hampshire
(603) 349- New Hampshire W Lebanon Wireless United States Cellular Corp. - New Hampshire
(603) 350- New Hampshire E Rochester Landline Brooks Fiber Communications Of New Hampshire
(603) 351- New Hampshire Manchester Landline Brooks Fiber Communications Of New Hampshire
(603) 352- New Hampshire Keene Landline No New England Tel Op DBA Fairpoint Comm
(603) 353- New Hampshire Orford Landline No New England Tel Op DBA Fairpoint Comm
(603) 354- New Hampshire Keene Landline No New England Tel Op DBA Fairpoint Comm
(603) 355- New Hampshire Keene Landline No New England Tel Op DBA Fairpoint Comm
(603) 356- New Hampshire North Conway Landline No New England Tel Op DBA Fairpoint Comm
(603) 357- New Hampshire Keene Landline No New England Tel Op DBA Fairpoint Comm
(603) 358- New Hampshire Keene Landline No New England Tel Op DBA Fairpoint Comm
(603) 359- New Hampshire Lebanon Wireless Bell Atlantic Nynex Mobile
(603) 360- New Hampshire Orford Landline Topsham Communications
(603) 361- New Hampshire Manchester Landline Bell Atlantic Nynex Mobile
(603) 362- New Hampshire Hampstead Landline No New England Tel Op DBA Fairpoint Comm
(603) 363- New Hampshire Chesterfield Landline No New England Tel Op DBA Fairpoint Comm
(603) 364- New Hampshire Gilmanton Landline Union Telephone Co.
(603) 365- New Hampshire Merrimack Wireless Sprint Spectrum L.p.
(603) 366- New Hampshire Laconia Landline No New England Tel Op DBA Fairpoint Comm
(603) 367- New Hampshire Madison Landline No New England Tel Op DBA Fairpoint Comm
(603) 369- New Hampshire Concord Landline Level 3 Communications
(603) 370- New Hampshire Candia Wireless Bell Atlantic Nynex Mobile
(603) 371- New Hampshire Peterborough Landline Conversent Communications Of New Hampshire
(603) 372- New Hampshire Claremont Landline Freedom Ring Communications
(603) 373- New Hampshire Portsmouth Landline Conversent Communications Of New Hampshire
(603) 374- New Hampshire Bartlett Landline No New England Tel Op DBA Fairpoint Comm
(603) 375- New Hampshire Ashland Landline Time Warner Cable Information Svcs (new Hampshire)
(603) 376- New Hampshire Dover Wireless No New England Tel Op DBA Fairpoint Comm
(603) 377- New Hampshire Merrimack Wireless Omnipoint Miami E License
(603) 378- New Hampshire Plaistow Landline No New England Tel Op DBA Fairpoint Comm
(603) 379- New Hampshire Rye Landline Brooks Fiber Communications Of New Hampshire
(603) 380- New Hampshire Portsmouth Wireless New Cingular Wireless PCS - DC
(603) 381- New Hampshire W Lebanon Wireless United States Cellular Corp. - New Hampshire
(603) 382- New Hampshire Plaistow Landline No New England Tel Op DBA Fairpoint Comm
(603) 383- New Hampshire Jackson Landline No New England Tel Op DBA Fairpoint Comm
(603) 384- New Hampshire Manchester Landline Comcast Phone Of New Hampshire
(603) 385- New Hampshire Manchester Wireless No New England Tel Op DBA Fairpoint Comm
(603) 386- New Hampshire Nashua Landline Broadview Networks
(603) 387- New Hampshire Laconia Wireless Bell Atlantic Nynex Mobile
(603) 388- New Hampshire Colebrook Landline Freedom Ring Communications
(603) 389- New Hampshire Durham Landline Choice One Communications Of New Hampshire
(603) 390- New Hampshire Jefferson Landline Brooks Fiber Communications Of New Hampshire
(603) 391- New Hampshire Manchester Landline Teleport Communications America
(603) 392- New Hampshire Winchester Landline Comcast Phone Of New Hampshire
(603) 393- New Hampshire Laconia Wireless United States Cellular Corp. - New Hampshire
(603) 394- New Hampshire Seabrook Landline No New England Tel Op DBA Fairpoint Comm
(603) 395- New Hampshire Exeter Landline Brooks Fiber Communications Of New Hampshire
(603) 396- New Hampshire Merrimack Wireless Sprint Spectrum L.p.
(603) 397- New Hampshire Durham Landline Comcast Phone Of New Hampshire
(603) 398- New Hampshire W Lebanon Wireless United States Cellular Corp. - New Hampshire
(603) 399- New Hampshire Westmoreland Landline No New England Tel Op DBA Fairpoint Comm
(603) 400- New Hampshire Hollis Landline Charter Fiberlink
(603) 401- New Hampshire Hampton Wireless Bell Atlantic Nynex Mobile
(603) 402- New Hampshire Nashua Wireless Bell Atlantic Nynex Mobile
(603) 410- New Hampshire Manchester Landline Conversent Communications Of New Hampshire
(603) 412- New Hampshire Plymouth Wireless United States Cellular Corp. - New Hampshire
(603) 413- New Hampshire Manchester Landline Paetec Communications
(603) 414- New Hampshire Sunapee Wireless United States Cellular Corp. - New Hampshire
(603) 415- New Hampshire Concord Landline Freedom Ring Communications
(603) 418- New Hampshire Exeter Landline Conversent Communications Of New Hampshire
(603) 419- New Hampshire Suncook Wireless United States Cellular Corp. - New Hampshire
(603) 420- New Hampshire Nashua Landline Brooks Fiber Communications Of New Hampshire
(603) 421- New Hampshire Derry Landline No New England Tel Op DBA Fairpoint Comm
(603) 422- New Hampshire Portsmouth Landline No New England Tel Op DBA Fairpoint Comm