Area Code — 403

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Rate centers: Calgary, Wrentham, Taber, Bowden, Innisfail, Red Deer, Okotoks, Lethbridge, 7 Digit Service, Airdrie, Drumheller, Rocky Mountain House, Stettler, Strathmore, Cereal, Didsbury, High River, Carstairs, Pincher Creek, Coutts, Coaldale, Brooks, Delia, Rumsey, Crowsnest Pass, Tilley, Duchess, Bindloss, Cayley, Three Hills, Coronation, Oyen, Olds, Veteran, Sundre, Warner, Vulcan, Vauxhall, Banff, Lake Louise, Hanna, Trochu, Consort, Cardston, Medicine Hat, Claresholm, Milk River, Canmore, Rockyford, Arrowwood, Ralston, Bow Island, Acme, Stavely, Altario, Fort Macleod, Longview, Empress, Cessford, Carbon, Penhold, Gadsby, Byemoor, Kananaskis, Milo, Blackfalds, Glenwood, Cowley, Torrington, Cremona, Granum, Bassano, Carmangay, Standard, Nanton, Grassy Lake, Bentley, Craigmyle, Etzikom, Exshaw, Sibbald, Rosebud, Blackie, Ponoka, Cochrane, Nordegg, Caroline, Hays, Spruceview, Leslieville, Picture Butte, New Dayton, Gleichen, Stand Off, Iron Springs, Enchant, Eckville, Alix, Delburne, Raymond, Stirling, Barons, Magrath, Saskatchewan River Crossing, Morrin, Elnora, Youngstown, Lacombe, Clive, Hussar, Mirror, Lomond, East Coulee, Nobleford, Seven Persons, Burdett, Irvine, Hilda, Schuler, Rimbey, Sylvan Lake, Waterton Park, Foremost, Manyberries, Big Valley, Morley, Castor, Donalda, Halkirk, Elkwater, Champion, Jenner, Turner Valley, Irricana, Langdon, Walsh, Crossfield, Beiseker, Bragg Creek, Rolling Hills, Brocket, Acadia Valley, Sunchild O'Chiese

Companies: TELUS Mobility, TELUS, Rogers Communications Partnership (Cable), Fido Solutions Inc., MTS Allstream, Bell Mobility, Bell West Inc., Rogers Communications Partnership (Wireless), Globalive Wireless Management Corp., Shaw Telecom Inc., Globility, GT Group Telecom Services Corp., ISP Telecom, Distributel, Globalstar, Iristel Inc., Fibernetics Corporation, YAK Communications (Canada) Corp., Bragg Communications Inc.

List of 403 Area-Code Phone Number Prefixes

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