Area Code — 203

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Phone numbers in area code 203 cover the cities of Ansonia, Beacon Falls, Botsford, Branford, Cheshire, Macys By Mail, Bloomingdales By Mail Ltd, Derby, Guilford, Hawleyville, Madison, Meriden, Milford, Monroe, Stepney, Upper Stepney, Newtown, N Branford, North Branford, Northford, No Haven, North Haven, Orange, Oxford, Seymour, Sandy Hook, Huntington, Shelton, South Britain, Southbury, Stevenson, Wallingford, Yalesville, Ct Gen Med Claims Office, Publishers Clearing House, Fosdick Corp, International Masters Pub, N Haven, New Haven, Hamden, East Haven, E Haven, Fair Haven, Westville, Allingtown, W Haven, West Haven, Whitneyville, Centerville-mount Carmel, Mount Carmel, Bethany, Woodbridge, Advertising Distr Co, Conn Bank & Trust Co, Bridgeport, Trumbull, Easton, Stratford, Stratmar Fulfillment Corp, Promotion Marketing Ser Inc, Controlled Distribution, U S Postal Service, Waterbury, Wtby, Plaza, East End, Wolcott, Prospect, Middlebury, Uniroyal Inc, Bethlehem, Naugatuck, Union City, Woodbury, Bethel, Brookfield, Brookfield Center, Brookfld Ctr, Cos Cob, Danbury, New Fairfield, Shared Zip For Brm, Grolier Entrprz Inc, Union Carbide Corp, Darien, Noroton, Noroton Heights, Tokeneke, Fairfield, General Electric, Georgetown, Belle Haven, Greenwich, Glenville, Greens Farms, New Canaan, Norwalk, Rowayton, South Norwalk, East Norwalk, M B I Inc, Setan Industries, Perkin Elmer Corp, Old Greenwich, Redding Cen, Redding Center, Redding Ridge, Ridgefield, Riverside, Promotion Systems Inc, Saugatuck, Westport, Weston, Promotional Dev Inc, Websters Unified, Southport, Redding, West Redding, Wilton, Stamford, Ridgeway, Glenbrook, Springdale, Conn National Bank, Champion International, Clairol Co, Conn Bank & Trust, Pitney Bowes Inc, Gecc in CT

The 203 area code covers the zip codes 6401, 6403, 6404, 6405, 6408, 6410, 6411, 6418, 6437, 6440, 6443, 6450, 6451, 6460, 6461, 6468, 6470, 6471, 6472, 6473, 6477, 6478, 6482, 6483, 6484, 6487, 6488, 6491, 6492, 6493, 6494, 6495, 6501, 6502, 6503, 6504, 6505, 6506, 6507, 6508, 6509, 6510, 6511, 6512, 6513, 6514, 6515, 6516, 6517, 6518, 6519, 6520, 6521, 6524, 6525, 6530, 6531, 6532, 6533, 6534, 6535, 6536, 6537, 6538, 6540, 6601, 6602, 6604, 6605, 6606, 6607, 6608, 6610, 6611, 6612, 6614, 6615, 6650, 6673, 6699, 6701, 6702, 6703, 6704, 6705, 6706, 6708, 6710, 6712, 6716, 6720, 6721, 6722, 6723, 6724, 6725, 6726, 6749, 6751, 6762, 6770, 6798, 6801, 6804, 6807, 6810, 6811, 6812, 6813, 6814, 6816, 6817, 6820, 6824, 6825, 6828, 6829, 6830, 6831, 6836, 6838, 6840, 6850, 6851, 6852, 6853, 6854, 6855, 6856, 6857, 6858, 6859, 6860, 6870, 6875, 6876, 6877, 6878, 6879, 6880, 6881, 6883, 6888, 6889, 6890, 6896, 6897, 6901, 6902, 6903, 6904, 6905, 6906, 6907, 6910, 6911, 6912, 6913, 6914, 6920, 6921, 6922, 6925, 6926, 6927, 6928 in CT

Rate centers: NEW HAVEN, DARIEN, GUILFORD, DANBURY, WATERBURY, BRANFORD, BRIDGEPORT, WILTON, MERIDEN, WESTPORT, STAMFORD, TRUMBULL, HUNTINGTON, NORWALK, ANSONIDRBY, RIDGEFIELD, MADISON, CHESHIRE, FAIRFIELD, WOODBURY, WALLINGFD, NEWTOWN, OLDGRNWICH, MILFORD, GREENWICH, NEW CANAAN, BYRAM, REDDING, WOLCOTT, SEYMOUR, XXXXXXXXXX, NAUGATUCK, GEORGETOWN, DIR ASST

Companies: BANDWIDTH.COM CLEC, LLC, SOUTHERN NEW ENGLAND TELEPHONE CO., LEVEL 3 COMMUNICATIONS, LLC, CELLCO PARTNERSHIP DBA VERIZON WIRELESS, USA MOBILITY WIRELESS, INC., CABLEVISION LIGHTPATH, INC., SPRINT SPECTRUM L.P., BROOKS FIBER COMMUNICATIONS OF CONNECTICUT INC, TELEPORT COMMUNICATIONS GROUP - NEW YORK, BROADWING COMMUNICATIONS, LLC, NEW CINGULAR WIRELESS PCS, LLC - DC, COMCAST PHONE OF CONNECTICUT, INC., SBC INTERNET SERVICES, INC., METRO PCS, INC., CHARTER FIBERLINK CT-CCO, LLC, NEXTEL COMMUNICATIONS, INC., OMNIPOINT COMMUNICATIONS, INC., CTC COMMUNICATIONS CORP., MCIMETRO ACCESS TRANSMISSION SERVICES LLC, CONVERSENT COMMUNICATIONS OF CONNECTICUT, LLC, PAETEC COMMUNICATIONS, INC., GLOBAL NAPS, INC. - RI, TELEPORT COMMUNICATIONS GROUP - NY, YMAX COMMUNICATIONS CORP., CHOICE ONE COMMUNICATIONS, INC., GLOBAL CROSSING LOCAL SERVICES, INC., MCI WORLDCOM COMMUNICATIONS, INC., AMERICAN MESSAGING (AM), INC., AT&T LOCAL, PAETEC COMMUNICATIONS, INC. - NY, VERIZON NEW YORK, INC., COX CONNECTICUT TELECOM, LLC, MULTIPLE OCN LISTING, GLOBAL NAPS, INC.-MA, PEERLESS NETWORK OF CONNECTICUT, LLC, GLOBAL NAPS, INC., EUREKA NETWORKS, BROADVIEW NETWORKS, INC. - NY

List of 203 Area-Code Phone Number Prefixes

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