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Area Code 203

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
ConnecticutLocation
United StatesCountry
203Area Code
Area Code Overview
Area Code203
Primary LocationConnecticut
CountryUnited States
Prefix Coverage200 listed prefixes
Prefixes in 203
203-200
New Haven
Bandwidth.com Clec Llc - Ct
Landline
203-201
Norwalk
Usa Mobility Wireless Inc.
Wireless
203-202
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-204
Stamford
Teleport Communications Group - New York - Ct
Landline
203-205
Danbury
Southern New England Telephone Co.
Landline
203-206
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-207
Danbury
Southern New England Telephone Co.
Landline
203-208
Hartford
Comcast Phone Of Connecticut Inc. - Ct
Landline
203-209
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-210
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-212
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-213
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-214
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-215
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-216
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-217
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-218
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-219
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-220
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-221
Westport
Southern New England Telephone Co.
Landline
203-222
Westport
Southern New England Telephone Co.
Landline
203-223
Stamford
Sprint Spectrum L.p.
Wireless
203-224
Bridgeport
Southern New England Telephone Co.
Landline
203-225
Shelton
Southern New England Telephone Co.
Landline
203-226
Westport
Southern New England Telephone Co.
Landline
203-227
Westport
Southern New England Telephone Co.
Landline
203-228
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-229
Norwalk
Southern New England Telephone Co.
Landline
203-230
Hamden
Southern New England Telephone Co.
Landline
203-231
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-232
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-233
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-234
North Haven
Southern New England Telephone Co.
Landline
203-235
Meriden
Southern New England Telephone Co.
Landline
203-236
Waterbury
Southern New England Telephone Co.
Landline
203-237
Meriden
Southern New England Telephone Co.
Landline
203-238
Meriden
Southern New England Telephone Co.
Landline
203-239
North Haven
Southern New England Telephone Co.
Landline
203-240
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-241
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-242
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-243
Bloomfield
Omnipoint Communications Inc. - Ct
Wireless
203-244
Hartford
Cablevision Lightpath Inc. - Ct
Landline
203-245
Madison
Southern New England Telephone Co.
Landline
203-246
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-247
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-248
Hamden
Southern New England Telephone Co.
Landline
203-249
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-250
Cheshire
Southern New England Telephone Co.
Landline
203-251
Stamford
Southern New England Telephone Co.
Landline
203-252
Bloomfield
Cablevision Lightpath Inc. - Ct
Landline
203-253
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-254
Unknown City
Southern New England Telephone Co.
Landline
203-255
Unknown City
Southern New England Telephone Co.
Landline
203-256
Unknown City
Southern New England Telephone Co.
Landline
203-257
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-258
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-259
Unknown City
Southern New England Telephone Co.
Landline
203-260
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-261
Trumbull
Southern New England Telephone Co.
Landline
203-262
Southbury
Southern New England Telephone Co.
Landline
203-263
Southbury
Southern New England Telephone Co.
Landline
203-264
Southbury
Southern New England Telephone Co.
Landline
203-265
Wallingford
Southern New England Telephone Co.
Landline
203-266
Southbury
Southern New England Telephone Co.
Landline
203-267
Southbury
Southern New England Telephone Co.
Landline
203-268
Trumbull
Southern New England Telephone Co.
Landline
203-269
Wallingford
Southern New England Telephone Co.
Landline
203-270
Newtown
Southern New England Telephone Co.
Landline
203-271
Cheshire
Southern New England Telephone Co.
Landline
203-272
Cheshire
Southern New England Telephone Co.
Landline
203-273
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-274
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-275
Bridgeport
Southern New England Telephone Co.
Landline
203-276
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-277
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-278
Bloomfield
Omnipoint Communications Inc. - Ct
Wireless
203-279
Bridgeport
Usa Mobility Wireless Inc.
Wireless
203-280
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-281
Hamden
Southern New England Telephone Co.
Landline
203-282
Stamford
Usa Mobility Wireless Inc.
Wireless
203-283
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-284
Wallingford
Southern New England Telephone Co.
Landline
203-285
Hartford
Teleport Communications Group - New York - Ct
Landline
203-286
New Haven
Conversent Communications Of Connecticut Llc
Landline
203-287
Hamden
Southern New England Telephone Co.
Landline
203-288
Hamden
Southern New England Telephone Co.
Landline
203-289
Danbury
Usa Mobility Wireless Inc.
Wireless
203-290
New York
Global Naps Inc. - Ri
Landline
203-291
Westport
Southern New England Telephone Co.
Landline
203-292
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-293
Hartford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-294
Wallingford
Southern New England Telephone Co.
Landline
203-295
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-296
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-297
Middletown
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-298
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-299
Norwalk
Southern New England Telephone Co.
Landline
203-300
Bloomfield
Omnipoint Communications Inc. - Ct
Wireless
203-301
Milford
Southern New England Telephone Co.
Landline
203-302
White Plains
Teleport Communications Group - Ny
Landline
203-303
Hartford
Teleport Communications Group - New York - Ct
Landline
203-304
Hartford
Teleport Communications Group - New York - Ct
Landline
203-305
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-306
Hartford
Choice One Communications Inc. - Ct
Landline
203-307
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-308
Bloomfield
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-309
Wallingford
Sprint Spectrum L.p.
Wireless
203-310
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-312
New Fairfield
Southern New England Telephone Co.
Landline
203-313
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-314
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-315
Branford
Southern New England Telephone Co.
Landline
203-316
Stamford
Southern New England Telephone Co.
Landline
203-317
Meriden
Southern New England Telephone Co.
Landline
203-318
Madison
Southern New England Telephone Co.
Landline
203-319
Unknown City
Southern New England Telephone Co.
Landline
203-320
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-321
Stamford
Southern New England Telephone Co.
Landline
203-322
Stamford
Southern New England Telephone Co.
Landline
203-323
Stamford
Southern New England Telephone Co.
Landline
203-324
Stamford
Southern New England Telephone Co.
Landline
203-325
Stamford
Southern New England Telephone Co.
Landline
203-326
Stamford
Southern New England Telephone Co.
Landline
203-327
Stamford
Southern New England Telephone Co.
Landline
203-328
Stamford
Southern New England Telephone Co.
Landline
203-329
Stamford
Southern New England Telephone Co.
Landline
203-330
Bridgeport
Southern New England Telephone Co.
Landline
203-331
Bridgeport
Southern New England Telephone Co.
Landline
203-332
Bridgeport
Southern New England Telephone Co.
Landline
203-333
Bridgeport
Southern New England Telephone Co.
Landline
203-334
Bridgeport
Southern New England Telephone Co.
Landline
203-335
Bridgeport
Southern New England Telephone Co.
Landline
203-336
Bridgeport
Southern New England Telephone Co.
Landline
203-337
Bridgeport
Southern New England Telephone Co.
Landline
203-338
Bridgeport
Southern New England Telephone Co.
Landline
203-339
Bridgeport
Southern New England Telephone Co.
Landline
203-340
Hicksville
Cablevision Lightpath Inc. - Ct
Landline
203-341
Westport
Southern New England Telephone Co.
Landline
203-342
Bridgeport
Usa Mobility Wireless Inc.
Wireless
203-343
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-344
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-345
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-346
Waterbury
Southern New England Telephone Co.
Landline
203-347
New York
Level 3 Communications Llc - Ct
Landline
203-348
Stamford
Southern New England Telephone Co.
Landline
203-349
Hartford
Teleport Communications Group - New York - Ct
Landline
203-350
Hartford
Teleport Communications Group - New York - Ct
Landline
203-351
Stamford
Southern New England Telephone Co.
Landline
203-352
Stamford
Southern New England Telephone Co.
Landline
203-353
Stamford
Southern New England Telephone Co.
Landline
203-354
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-355
Norwalk
Cablevision Lightpath Inc. - Ct
Landline
203-356
Stamford
Southern New England Telephone Co.
Landline
203-357
Stamford
Southern New England Telephone Co.
Landline
203-358
Stamford
Southern New England Telephone Co.
Landline
203-359
Stamford
Southern New England Telephone Co.
Landline
203-360
Norwalk
Metro Pcs Inc.
Landline
203-361
Wallingford
Level 3 Communications Llc - Ct
Landline
203-362
Bridgeport
Southern New England Telephone Co.
Landline
203-363
Stamford
Southern New England Telephone Co.
Landline
203-364
Newtown
Southern New England Telephone Co.
Landline
203-365
Bridgeport
Southern New England Telephone Co.
Landline
203-366
Bridgeport
Southern New England Telephone Co.
Landline
203-367
Bridgeport
Southern New England Telephone Co.
Landline
203-368
Bridgeport
Southern New England Telephone Co.
Landline
203-369
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-370
Southbury
American Messaging (am) Inc.
Landline
203-371
Bridgeport
Southern New England Telephone Co.
Landline
203-372
Bridgeport
Southern New England Telephone Co.
Landline
203-373
Bridgeport
Southern New England Telephone Co.
Landline
203-374
Bridgeport
Southern New England Telephone Co.
Landline
203-375
Stratford
Southern New England Telephone Co.
Landline
203-376
Wallingford
Cellco Partnership Dba Verizon Wireless - Ct
Wireless
203-377
Stratford
Southern New England Telephone Co.
Landline
203-378
Stratford
Southern New England Telephone Co.
Landline
203-379
Meriden
Southern New England Telephone Co.
Landline
203-380
Stratford
Southern New England Telephone Co.
Landline
203-381
Stratford
Southern New England Telephone Co.
Landline
203-382
Bridgeport
Southern New England Telephone Co.
Landline
203-383
Stratford
Southern New England Telephone Co.
Landline
203-384
Bridgeport
Southern New England Telephone Co.
Landline
203-385
Stratford
Southern New England Telephone Co.
Landline
203-386
Stratford
Southern New England Telephone Co.
Landline
203-387
New Haven
Southern New England Telephone Co.
Landline
203-388
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-389
New Haven
Southern New England Telephone Co.
Landline
203-390
New Haven
Usa Mobility Wireless Inc.
Wireless
203-391
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-392
New Haven
Southern New England Telephone Co.
Landline
203-393
Bethany
Southern New England Telephone Co.
Landline
203-394
Bridgeport
Southern New England Telephone Co.
Landline
203-395
Bridgeport
Sprint Spectrum L.p.
Wireless
203-396
Bridgeport
Southern New England Telephone Co.
Landline
203-397
New Haven
Southern New England Telephone Co.
Landline
203-398
Norwalk
Usa Mobility Wireless Inc.
Wireless
203-399
Stamford
Brooks Fiber Communications Of Connecticut Inc-ct
Landline
203-400
Middletown
New Cingular Wireless Pcs Llc - Dc
Wireless
203-401
New Haven
Southern New England Telephone Co.
Landline
203-402
Shelton
Southern New England Telephone Co.
Landline

Top prefixes in this area code

203-200→203-201→203-202→203-204→203-205→203-206→203-207→203-208→
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.