Area Code — 603

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Phone numbers in area code 603 cover the cities of Amherst, Auburn, Brookline, Candia, Chester, Deerfield, Derry, Londonderry, E Candia, East Candia, E Derry, East Derry, Epping, Francestown, Fremont, Goffstown, Dunbarton, Greenfield, Greenville, Mason, Hollis, Hudson, Litchfield, Merrimack, Milford, Mont Vernon, Mount Vernon, Mt Vernon, Nashua, New Boston, New Ipswich, N Salem, No Salem, North Salem, Pelham, Raymond, Salem, Lyndeboro, Lyndeborough, Temple, Wilton, Windham, Manchester, Pinardville, Hooksett, Nh Insurance, Bedford, Shared Firm Zip, Waterville Valley, Waterville Vly, Watervl Vly, Andover, Ashland, Barnstead, Belmont, Bradford, Sutton, Alexandria, Bridgewater, Bristol, Campton, Ellsworth, Thornton, Canterbury, Center Barnstead, Ctr Barnstead, Center Harbor, Centre Harbor, Ctr Harbor, Center Sandwich, Ctr Sandwich, Sandwich, Contoocook, Hopkinton, Danbury, E Andover, East Andover, Elkins, Epsom, Franklin, W Franklin, West Franklin, Gilmanton, Glencliff, Grafton, E Hebron, East Hebron, Groton, Hebron, Henniker, Hill, Deering, Hillsboro, Hillsborough, Windsor, Holderness, Laconia, Lakeport, Weirs Beach, Gilford, Guilford, Lincoln, Lochmere, Meredith, Moultonboro, Moultonborough, Mount Sunapee, Mt Sunapee, Newbury, New Hampton, New London, Chichester, North Chichester, N Sandwich, North Sandwich, N Sutton, North Sutton, Northwood, N Woodstock, North Woodstock, Pittsfield, Plymouth, Dorchester, Rumney, Salisbury, Sanbornton, S Newbury, South Newbury, S Sutton, South Sutton, Stinson Lake, Allenstown, Pembroke, Suncook, Northfield, Tilton, Warner, Warren, Washington, Weare, Wentworth, Springfield, W Springfield, West Springfield, Wilmot, Wilmot Flat, Winnisquam, Nottingham, W Nottingham, West Nottingham, Woodstock, Brm J Jill, J Jill, Concord, Boscawen, Penacook, Webster, Bow, Nh Dept Of Safety, Loudon, Keene, N Swanzey, North Swanzey, Roxbury, Surry, Keene State College, Antrim, Ashuelot, Bennington, Chesterfield, Dublin, E Sullivan, East Sullivan, Nelson, Sullivan, E Swanzey, East Swanzey, Swanzey, Swanzey Center, Swanzey Ctr, Fitzwilliam, Gilsum, Hancock, Harrisville, Hinsdale, Jaffrey, Marlborough, Marlow, Munsonville, Stoddard, Peterborough, Sharon, Rindge, Spofford, Troy, W Chesterfield, W Chesterfld, West Chesterfield, Westmoreland, W Peterboro, W Peterborough, West Peterborough, W Swanzey, West Swanzey, Richmond, Winchester, Littleton, Berlin, Bethlehem, Bretton Woods, Colebrook, Columbia, Dixville, Dixville Notch, Stewartstown, Errol, Wentworths Location, Wntwrths Lctn, Easton, Franconia, Gorham, Shelburne, Groveton, Northumberland, Northumberlnd, Stark, Jefferson, Lancaster, Landaff, Lisbon, Lyman, Sugar Hill, Dummer, Milan, Mount Washington, Mt Washington, N Stratford, No Stratford, North Stratford, Stratford, Clarksville, Pittsburg, Randolph, Twin Mountain, W Stewartstown, W Stewartstwn, West Stewartstown, Carroll, Dalton, Whitefield, Acworth, Alstead, Alstead Center, East Alstead, Langdon, Charlestown, Unity, Drewsville, E Lempster, East Lempster, Lempster, S Acworth, So Acworth, South Acworth, Walpole, N Walpole, No Walpole, North Walpole, Bath, Canaan, Orange, Claremont, Cornish, Cornish Flat, Enfield, Enfield Center, Enfield Ctr, Etna, Georges Mills, Goshen, Grantham, Guild, Hanover, Dartmouth Hitchcock Med Ctr, Lebanon, Haverhill, Lyme, Lyme Center, Meriden, Monroe, Croydon, Newport, N Haverhill, No Haverhill, North Haverhill, Orford, Piermont, Benton, Pike, Plainfield, Sunapee, W Lebanon, West Lebanon, Woodsville, Newington, Portsmouth, Air National Guard, Alton, Alton Bay, West Alton, Atkinson, Bartlett, Harts Lctn, Harts Location, Center Conway, Chatham, North Chatham, South Chatham, Center Ossipee, Ctr Ossipee, Center Strafford, Ctr Strafford, Center Tuftonboro, Ctr Tuftnboro, Ctr Tuftonboro, Tuftonboro, Chocorua, Albany, Conway, Danville, S Danville, So Danville, South Danville, Dover, Liberty Mutual Insurance, Madbury, Durham, Lee, Barrington, E Hampstead, East Hampstead, E Kingston, East Kingston, S Hampton, So Hampton, South Hampton, E Wakefield, East Wakefield, Wakefield, Eaton, Eaton Center, Eaton Ctr, Brentwood, Exeter, Kensington, Farmington, Freedom, Gilmanton Iron Works, Gilmanton Iw, Glen, Gonic, Rochester, Greenland, Hampstead, Hampton, Hampton Beach, Hampton Falls, Intervale, Jackson, Kearsarge, Kingston, Madison, Melvin Village, Melvin Vlg, Milton, Milton Mills, Mirror Lake, New Castle, Newcastle, New Durham, Newfields, Newmarket, Newton, Newton Jct, Newton Junction, Hales Lctn, Hales Location, N Conway, No Conway, North Conway, N Hampton, No Hampton, North Hampton, Ossipee, Plaistow, E Rochester, East Rochester, Rollinsford, Rye, Rye Beach, Brookfield, Sanbornville, Sandown, Seabrook, Silver Lake, Somersworth, Effingham, S Effingham, So Effingham, South Effingham, S Tamworth, So Tamworth, South Tamworth, Strafford, Stratham, Tamworth, Middleton, Union, W Ossipee, West Ossipee, Wolfeboro, Wolfeboro Falls, Wolfeboro Fls, Wonalancet in NH

The 603 area code covers the zip codes 3031, 3032, 3033, 3034, 3036, 3037, 3038, 3040, 3041, 3042, 3043, 3044, 3045, 3046, 3047, 3048, 3049, 3051, 3052, 3053, 3054, 3055, 3057, 3060, 3061, 3062, 3063, 3064, 3070, 3071, 3073, 3076, 3077, 3079, 3082, 3084, 3086, 3087, 3101, 3102, 3103, 3104, 3105, 3106, 3107, 3108, 3109, 3110, 3111, 3215, 3216, 3217, 3218, 3220, 3221, 3222, 3223, 3224, 3225, 3226, 3227, 3229, 3230, 3231, 3233, 3234, 3235, 3237, 3238, 3240, 3241, 3242, 3243, 3244, 3245, 3246, 3247, 3249, 3251, 3252, 3253, 3254, 3255, 3256, 3257, 3258, 3259, 3260, 3261, 3262, 3263, 3264, 3266, 3268, 3269, 3272, 3273, 3274, 3275, 3276, 3278, 3279, 3280, 3281, 3282, 3284, 3285, 3287, 3289, 3290, 3291, 3293, 3298, 3299, 3301, 3302, 3303, 3304, 3305, 3307, 3431, 3435, 3440, 3441, 3442, 3443, 3444, 3445, 3446, 3447, 3448, 3449, 3450, 3451, 3452, 3455, 3456, 3457, 3458, 3461, 3462, 3464, 3465, 3466, 3467, 3468, 3469, 3470, 3561, 3570, 3574, 3575, 3576, 3579, 3580, 3581, 3582, 3583, 3584, 3585, 3586, 3588, 3589, 3590, 3592, 3593, 3595, 3597, 3598, 3601, 3602, 3603, 3604, 3605, 3607, 3608, 3609, 3740, 3741, 3743, 3745, 3746, 3748, 3749, 3750, 3751, 3752, 3753, 3754, 3755, 3756, 3765, 3766, 3768, 3769, 3770, 3771, 3773, 3774, 3777, 3779, 3780, 3781, 3782, 3784, 3785, 3801, 3802, 3803, 3804, 3805, 3809, 3810, 3811, 3812, 3813, 3814, 3815, 3816, 3817, 3818, 3819, 3820, 3821, 3822, 3823, 3824, 3825, 3826, 3827, 3830, 3832, 3833, 3835, 3836, 3837, 3838, 3839, 3840, 3841, 3842, 3843, 3844, 3845, 3846, 3847, 3848, 3849, 3850, 3851, 3852, 3853, 3854, 3855, 3856, 3857, 3858, 3859, 3860, 3861, 3862, 3864, 3865, 3866, 3867, 3868, 3869, 3870, 3871, 3872, 3873, 3874, 3875, 3878, 3882, 3883, 3884, 3885, 3886, 3887, 3890, 3894, 3896, 3897 in NH

Rate centers: NEWMARKET, MANCHESTER, NASHUA, PORTSMOUTH, LYME, KEENE, SUNCOOK, SALEM, DERRY, ERROL, BERLIN, BRISTOL, CONCORD, CAMPTON, COLEBROOK, PLYMOUTH, WINCHESTER, TROY, WOODSVILLE, RAYMOND, WSTEWATSTN, DOVER, MILFORD, CENTER HBR, W LEBANON, DIXVL NTCH, WCHESTEFLD, PLAISTOW, PETERBROGH, LITTLETON, MERRIMACK, NEW BOSTON, TILTON, BELMONT, CTRBARNSTE, PIERMONT, LACONIA, SO HAMPTON, HANOVER, BRETTON WD, MEREDITH, BARRINGTON, CANAAN, CTRSANDWIH, CLAREMONT, GREENVILLE, DURHAM, CTROSSIPEE, CHESTER, ENFIELD, LEBANON, FRANKLIN, BEDFORD, MILAN, TAMWORTH, HAMPSTEAD, ROCHESTER, HINSDALE, KINGSTON, NOWOODSTOK, MILTON, GOFFSTOWN, ORFORD, NO CONWAY, SPOFFORD, GLNTNIRWRS, MADISON, NEWPORT, CANDIA, BARTLETT, RYE BEACH, JACKSON, JEFFERSON, EXETER, WESTMORELD, HOLLIS, SUNAPEE, HENNIKER, PITTSFIELD, NO WALPOLE, MARLOW, CONWAY, WARNER, DEERFIELD, HILLSBORO, GORHAM, SEABROOK, MERIDEN, MILTON ML, HLLSBUPVLG, WASHINGTON, LANCASTER, DANBURY, PELHAM, WOLFEBORO, SANBORNVL, HANCOCK, NEW LONDON, WEARE, JAFFREY, PITTSBURG, MELVIN VLG, GREENFIELD, DIR ASST, DUBLIN, PENACOOK, ALSTEAD, FITZWILLIM, ANTRIM, HAMPTON, NORTHWOOD, PIKE, GROVETON, MONROE, SALISBURY, WILTON, PLAINFIELD, EPPING, SOMERSWTH, CHATHAM, EPSOM, NEW DURHAM, CANTERBURY, RINDGE, ANDOVER, CONTOOCOOK, FARMINGTON, WALPOLE, WARREN, DUNBARTON, BARNSTEAD, RUMNEY, BOSCAWEN, CHICHESTER, FRANCONIA, CHARLESTN, HARRISVL, WHITEFIELD, LISBON, TWIN MT, SULLIVAN, ALTON, BETHLEHEM, MARLBOROGH, SUTTON, NO STRATFD, BRADFORD, EASTCONWAY, ASHLAND

Companies: COMCAST PHONE OF NEW HAMPSHIRE, LLC, NEW CINGULAR WIRELESS PCS, LLC - DC, OMNIPOINT MIAMI E LICENSE, LLC, UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE, BELL ATLANTIC NYNEX MOBILE, PAETEC COMMUNICATIONS, INC., OTEL TELEKOM, INC., RNK, INC., TCG NEW JERSEY, INC., NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM, DSCI CORPORATION, FREEDOM RING COMMUNICATIONS, LLC, BROOKS FIBER COMMUNICATIONS OF NEW HAMPSHIRE, NEXTEL COMMUNICATIONS, INC., CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC, CTC COMMUNICATIONS CORP., CHOICE ONE COMMUNICATIONS OF NEW HAMPSHIRE, INC., IDT AMERICA CORP, LEVEL 3 COMMUNICATIONS, CRC COMMUNICATIONS OF MAINE, INC., BROADVIEW NETWORKS, INC., SPRINT SPECTRUM L.P., LIGHTSHIP TELECOM, LLC, CHARTER FIBERLINK NH-CCO-LLC, GLOBAL NAPS, INC., DIXVILLE TELEPHONE CO., AT&T LOCAL, METRO PCS, INC., UNION TELEPHONE CO., NATIONAL MOBILE COMMUNICATIONS CORPORATION - VT, BRETTON WOODS TELEPHONE CO., TOPSHAM COMMUNICATIONS, LLC, MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY, MERRIMACK COUNTY TELEPHONE CO., HOLLIS TELEPHONE COMPANY, INC., KEARSARGE TELEPHONE CO., GRANITE STATE TELEPHONE, INC., RURAL CELLULAR CORPORATION, MULTIPLE OCN LISTING, WILTON TELEPHONE CO., NORTHLAND TELEPHONE OF MAINE, INC., BANDWIDTH.COM CLEC, LLC, DUNBARTON TELEPHONE COMPANY, SECURESYSCOM, INC., NEUTRAL TANDEM-NEW HAMPSHIRE, LLC

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