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Area Code 603

Browse available prefixes, locations, carriers, and quick path links into deeper phone number pages for this area code. Area-code research is one of the most important parts of reverse phone lookup because it gives visitors a geographic starting point before they inspect a full number.

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200Prefixes Listed
New HampshireLocation
United StatesCountry
603Area Code
Area Code Overview
Area Code603
Primary LocationNew Hampshire
CountryUnited States
Prefix Coverage200 listed prefixes
Prefixes in 603
603-200
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-203
Derry
New Cingular Wireless Pcs Llc - Dc
Wireless
603-204
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-205
Manchester
Omnipoint Miami E License Llc
Wireless
603-206
Manchester
Paetec Communications Inc. - Nh
Landline
603-208
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-209
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-210
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-212
Salem
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-213
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-214
Portsmouth
Freedom Ring Communications Llc
Landline
603-215
Portsmouth
Freedom Ring Communications Llc
Landline
603-216
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-217
Manchester
Rnk Inc.
Landline
603-218
Salem
Broadview Networks Inc. - Nh
Landline
603-219
Manchester
Sprint Spectrum L.p.
Wireless
603-221
Nashua
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-222
Manchester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-223
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-224
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-225
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-226
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-227
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-228
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-229
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-230
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-231
Nashua
Sprint Spectrum L.p.
Wireless
603-232
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-233
Manchester
Omnipoint Miami E License Llc
Wireless
603-234
Nashua
Sprint Spectrum L.p.
Wireless
603-235
Nashua
Sprint Spectrum L.p.
Wireless
603-236
Thornton
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-237
Colebrook
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-238
Manchester
Paetec Communications Inc. - Nh
Landline
603-239
Winchester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-240
Manchester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-241
Manchester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-242
Troy
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-243
Manchester
Charter Fiberlink Nh-cco Llc - Nh
Landline
603-244
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-245
Portsmouth
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-246
West Stewartstown
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-247
Derry
New Cingular Wireless Pcs Llc - Dc
Wireless
603-248
Dover
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-249
Milford
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-250
Portsmouth
Freedom Ring Communications Llc
Landline
603-251
Manchester
Paetec Communications Inc. - Nh
Landline
603-252
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-253
Center Harbor
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-254
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-255
Colebrook
Dixville Telephone Co.
Landline
603-256
Brattleboro
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-257
Portsmouth
Freedom Ring Communications Llc
Landline
603-259
Manchester
Level 3 Communications - Nh
Landline
603-260
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-261
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-262
Merrimack
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-263
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-264
Manchester
Omnipoint Miami E License Llc
Wireless
603-265
Manchester
Omnipoint Miami E License Llc
Wireless
603-266
Tilton
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-267
Belmont
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-268
Suncook
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-269
Center Barnstead
Union Telephone Co. - Nh
Wireless
603-270
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-271
Concord
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-272
Bradford
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-273
Hooksett
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-274
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-275
Manchester
Omnipoint Miami E License Llc
Wireless
603-276
Manchester
Bell Atlantic Nynex Mobile
Landline
603-277
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-278
Bretton Woods
Bretton Woods Telephone Co.
Landline
603-279
Meredith
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-280
Manchester
Level 3 Communications - Nh
Landline
603-281
Nashua
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-282
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-283
Manchester
Paetec Communications Inc. - Nh
Landline
603-284
Center Sandwich
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-285
Derry
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-286
Tilton
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-287
Manchester
Level 3 Communications - Nh
Landline
603-289
Derry
New Cingular Wireless Pcs Llc - Dc
Wireless
603-290
Derry
United States Cellular Corp. - New Hampshire
Wireless
603-291
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-292
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-293
Laconia
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-294
Manchester
Level 3 Communications - Nh
Landline
603-295
Manchester
Paetec Communications Inc. - Nh
Landline
603-296
Manchester
Choice One Communications Of New Hampshire Inc.
Landline
603-297
Portsmouth
Freedom Ring Communications Llc
Landline
603-298
White River Junction
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-300
Nashua
Sprint Spectrum L.p.
Wireless
603-301
Manchester
Rnk Inc.
Landline
603-302
Manchester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-303
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-304
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-305
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-306
Hooksett
National Mobile Communications Corporation - Vt
Landline
603-307
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-310
Manchester
Ctc Communications Corp. - Nh
Landline
603-312
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-313
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-314
Manchester
Lightship Telecom Llc - Nh
Landline
603-315
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-317
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-318
Concord
Rnk Inc.
Landline
603-319
Manchester
Lightship Telecom Llc - Nh
Landline
603-320
Derry
New Cingular Wireless Pcs Llc - Dc
Wireless
603-321
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-322
Derry
New Cingular Wireless Pcs Llc - Dc
Wireless
603-323
Tamworth
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-324
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-325
Hooksett
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-326
Manchester
Level 3 Communications - Nh
Landline
603-327
Hooksett
Lightship Telecom Llc - Nh
Landline
603-328
Manchester
Paetec Communications Inc. - Nh
Landline
603-329
Hampstead
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-330
Rochester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-331
Hooksett
Level 3 Communications - Nh
Landline
603-332
Rochester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-334
Portsmouth
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-335
Rochester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-336
Hinsdale
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-337
Rochester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-338
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-339
Derry
New Cingular Wireless Pcs Llc - Dc
Wireless
603-340
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-341
Hooksett
United States Cellular Corp. - New Hampshire
Wireless
603-342
Berlin
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-343
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-344
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-345
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-346
Manchester
Level 3 Communications - Nh
Landline
603-347
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-348
Hooksett
United States Cellular Corp. - New Hampshire
Wireless
603-349
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-350
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-351
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-352
Keene
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-353
Fairlee
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-354
Keene
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-355
Keene
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-356
North Conway
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-357
Keene
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-358
Keene
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-359
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-360
Manchester
Topsham Communications Llc
Landline
603-361
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-362
Atkinson
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-363
Spofford
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-364
Center Sandwich
Union Telephone Co. - Nh
Wireless
603-365
Nashua
Sprint Spectrum L.p.
Wireless
603-366
Laconia
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-367
Madison
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-369
Derry
Level 3 Communications - Nh
Landline
603-370
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-371
Nashua
Conversent Communications Of New Hampshire Llc
Landline
603-372
Portsmouth
Freedom Ring Communications Llc
Landline
603-373
Nashua
Conversent Communications Of New Hampshire Llc
Landline
603-374
Bartlett
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-375
Manchester
Time Warner Cable Information Svcs (new Hampshire)
Landline
603-376
Dover
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-377
Manchester
Omnipoint Miami E License Llc
Wireless
603-378
Plaistow
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-379
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-380
Derry
New Cingular Wireless Pcs Llc - Dc
Wireless
603-381
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-382
Plaistow
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-383
Jackson
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-384
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-385
Manchester
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-386
Salem
Broadview Networks Inc. - Nh
Landline
603-387
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-388
Portsmouth
Freedom Ring Communications Llc
Landline
603-389
Manchester
Choice One Communications Of New Hampshire Inc.
Landline
603-390
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-391
Hooksett
Tcg New Jersey Inc. - Nh
Landline
603-392
Manchester
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-393
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-394
Exeter
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-395
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-396
Nashua
Sprint Spectrum L.p.
Wireless
603-397
Hooksett
Comcast Phone Of New Hampshire Llc - Nh
Landline
603-398
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-399
Westmoreland
No New England Tel Op Dba Fairpoint Comm - Nh
Landline
603-400
Manchester
Charter Fiberlink Nh-cco Llc - Nh
Landline
603-401
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-402
Hooksett
Bell Atlantic Nynex Mobile
Landline
603-404
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-407
Unknown City
Bell Atlantic Nynex Mobile
Landline
603-410
Nashua
Conversent Communications Of New Hampshire Llc
Landline
603-412
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-413
Concord
Rnk Inc.
Landline
603-414
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-415
Portsmouth
Freedom Ring Communications Llc
Landline
603-418
Nashua
Conversent Communications Of New Hampshire Llc
Landline
603-419
Merrimack
United States Cellular Corp. - New Hampshire
Wireless
603-420
Manchester
Brooks Fiber Communications Of New Hampshire - Nh
Landline
603-421
Derry
No New England Tel Op Dba Fairpoint Comm - Nh
Landline

Top prefixes in this area code

603-200→603-203→603-204→603-205→603-206→603-208→603-209→603-210→
Why area code pages matter in reverse phone lookup

Area code pages help visitors understand the wider calling region connected to a number. While a full reverse phone lookup page focuses on one specific caller, an area code page shows the bigger picture by grouping prefixes, cities, and carrier patterns under the same first three digits. This makes it easier to spot whether a number appears local, regional, or part of a service area the visitor already recognizes.

For phone directory websites, area code pages also improve browsing. A user can start with a missed call, discover the number's first three digits, and then move into the related area code to see supporting location data and a list of active prefixes. That layered navigation creates a better research experience and gives visitors more confidence when they continue into a specific number page.