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Updated Jan 02, 2010Area Code 303
  1. "E" is Eastern Time Zone, "C" is Central Time Zone, "M" is Mountain Time Zone, and "P" is Pacific Time Zone. Occasionally, an area code will fall in more than one time zone. In this case, the abbreviation is a combination of the previous abbreviations. Some area codes are shown with time zones referencing Universal Coordinated Time (UTC).
  2. Additional technical status can be retrived from the North American Numbering Plan Administration on the 303 area code specific link here.
Area Code303 (area code map)
LocationColorado
Dates and historical informationArea code 303 went live into service on January 01, 1947 (The paperwork process started on January 01, 1947).  This area code was split to create the 970 area code(s).  It has had the 720 area code(s) overlaid on it.
Growth StatusThis original "parent" area code went live on January 01, 1947 and due to growth it has been "overlaid" by the 720 area code to provide more telephone numbers in the area.  This means this original "parent" 303 area code has seen quite a bit of growth and as a result has been subdivided into 2 area codes over the years.
Technical Status 2Area code 303 is currently live and in service.
Time Zone(s) 1M
LATA numbers served656
Number of rate centers served16
List of rate centersDENVER, AURORA, BRIGHTON, DENVERSLVN, FORTLUPTON, DECKERS, LONGMONT, HUDSON, GEORGETOWN, KEENESBURG, STRASBURG, BENNETT, DEER TRAIL, ALLNSPKLYN, BYERS, ROGGEN
Number of major cities served68
Names of major cities served (ZIP code)Denver (80202), Wheat Ridge (80214), Denver (80214), Lakewood (80214), Edgewater (80214), (00000), Aurora (80010), Golden (80401), Evergreen (80401), Lakewood (80401), Brighton (80601), Thornton (80601), Englewood (80111), Centennial (80111), Cherry Hills (80111), Cherry Hills Village (80111), Cherry Hl Vlg (80111), Greenwood Village (80111), Greenwood Vlg (80111), Commerce City (80022), Denver (80022), Brighton (80022), Adams City (80022), Irondale (80022), Denver (80205), Boulder (80302), Westminster (80221), Denver (80221), Federal Heights (80221), Federal Hgts (80221), Thornton (80221), Northglenn (80221), Nederland (80466), Aurora (80015), Centennial (80015), Aurora (80220), Denver (80220), Broomfield (80020), Westminster (80020), Denver (80209), Aurora (80014), Denver (80014), Centennial (80014), Denver (80222), Littleton (80122), Centennial (80122), Louisville (80027), Superior (80027), Denver (80239), Denver (80218), Littleton (80126), Hghlnds Ranch (80126), Highlands Ranch (80126), Littleton (80120), Bailey (80421), Englewood (80112), Centennial (80112), Greenwood Village (80112), Greenwood Vlg (80112), Lone Tree (80112), Arvada (80002), Wheat Ridge (80002), Denver (80002), Westminster (80030), Denver (80030), Denver (80211), Ward (80481), Longmont (80501), Boulder (80303), Hudson (80642), Fort Lupton (80621), Wattenburg (80621), Ft Lupton (80621), Littleton (80123), Denver (80123), Centennial (80123), Grants Ranch (80123), Bow Mar (80123), Columbine Valley (80123), Columbine Vly (80123), Lakewood (80123), Boulder (80301), Idaho Springs (80452), Georgetown (80444), Keenesburg (80643), Central City (80427), Kiowa (80117), Strasburg (80136), Coal Creek (81221), Bennett (80102), Elizabeth (80107), Elbert (80106), Black Forest (80106), Niwot (80544), Castle Rock (80104), Golden (80439), Evergreen (80439), Larkspur (80118), Morrison (80465), Denver (80227), Lakewood (80227), Englewood (80110), Cherry Hills (80110), Cherry Hills Village (80110), Cherry Hl Vlg (80110), Greenwood Village (80110), Greenwood Vlg (80110), Sheridan (80110), Deer Trail (80105), Denver (80219), Allenspark (80510), Parker (80134), Byers (80103), Lyons (80540), Erie (80516), Frederick (80516), Frederick (80530), Roggen (80652)
Number of exchanges served783
List of exchanges served303-200-xxxx, 303-201-xxxx, 303-202-xxxx, 303-203-xxxx, 303-204-xxxx, 303-205-xxxx, 303-206-xxxx, 303-207-xxxx, 303-208-xxxx, 303-209-xxxx, 303-210-xxxx, 303-212-xxxx, 303-213-xxxx, 303-214-xxxx, 303-215-xxxx, 303-216-xxxx, 303-217-xxxx, 303-218-xxxx, 303-219-xxxx, 303-220-xxxx, 303-221-xxxx, 303-222-xxxx, 303-223-xxxx, 303-224-xxxx, 303-225-xxxx, 303-226-xxxx, 303-227-xxxx, 303-228-xxxx, 303-229-xxxx, 303-230-xxxx, 303-231-xxxx, 303-232-xxxx, 303-233-xxxx, 303-234-xxxx, 303-235-xxxx, 303-236-xxxx, 303-237-xxxx, 303-238-xxxx, 303-239-xxxx, 303-240-xxxx, 303-241-xxxx, 303-242-xxxx, 303-243-xxxx, 303-244-xxxx, 303-245-xxxx, 303-246-xxxx, 303-247-xxxx, 303-248-xxxx, 303-249-xxxx, 303-250-xxxx, 303-251-xxxx, 303-252-xxxx, 303-253-xxxx, 303-254-xxxx, 303-255-xxxx, 303-256-xxxx, 303-257-xxxx, 303-258-xxxx, 303-259-xxxx, 303-260-xxxx, 303-261-xxxx, 303-262-xxxx, 303-263-xxxx, 303-264-xxxx, 303-265-xxxx, 303-266-xxxx, 303-267-xxxx, 303-268-xxxx, 303-269-xxxx, 303-270-xxxx, 303-271-xxxx, 303-272-xxxx, 303-273-xxxx, 303-274-xxxx, 303-275-xxxx, 303-276-xxxx, 303-277-xxxx, 303-278-xxxx, 303-279-xxxx, 303-280-xxxx, 303-281-xxxx, 303-282-xxxx, 303-283-xxxx, 303-284-xxxx, 303-285-xxxx, 303-286-xxxx, 303-287-xxxx, 303-288-xxxx, 303-289-xxxx, 303-290-xxxx, 303-291-xxxx, 303-292-xxxx, 303-293-xxxx, 303-294-xxxx, 303-295-xxxx, 303-296-xxxx, 303-297-xxxx, 303-298-xxxx, 303-299-xxxx, 303-300-xxxx, 303-301-xxxx, 303-302-xxxx, 303-304-xxxx, 303-305-xxxx, 303-306-xxxx, 303-307-xxxx, 303-308-xxxx, 303-309-xxxx, 303-310-xxxx, 303-312-xxxx, 303-313-xxxx, 303-314-xxxx, 303-315-xxxx, 303-316-xxxx, 303-317-xxxx, 303-318-xxxx, 303-319-xxxx, 303-320-xxxx, 303-321-xxxx, 303-322-xxxx, 303-323-xxxx, 303-324-xxxx, 303-325-xxxx, 303-326-xxxx, 303-327-xxxx, 303-328-xxxx, 303-329-xxxx, 303-330-xxxx, 303-331-xxxx, 303-332-xxxx, 303-333-xxxx, 303-334-xxxx, 303-335-xxxx, 303-336-xxxx, 303-337-xxxx, 303-338-xxxx, 303-339-xxxx, 303-340-xxxx, 303-341-xxxx, 303-342-xxxx, 303-343-xxxx, 303-344-xxxx, 303-345-xxxx, 303-346-xxxx, 303-347-xxxx, 303-348-xxxx, 303-349-xxxx, 303-350-xxxx, 303-351-xxxx, 303-352-xxxx, 303-353-xxxx, 303-354-xxxx, 303-355-xxxx, 303-356-xxxx, 303-357-xxxx, 303-358-xxxx, 303-359-xxxx, 303-360-xxxx, 303-361-xxxx, 303-362-xxxx, 303-363-xxxx, 303-364-xxxx, 303-365-xxxx, 303-366-xxxx, 303-367-xxxx, 303-368-xxxx, 303-369-xxxx, 303-370-xxxx, 303-371-xxxx, 303-372-xxxx, 303-373-xxxx, 303-374-xxxx, 303-375-xxxx, 303-376-xxxx, 303-377-xxxx, 303-378-xxxx, 303-379-xxxx, 303-380-xxxx, 303-381-xxxx, 303-382-xxxx, 303-383-xxxx, 303-384-xxxx, 303-385-xxxx, 303-386-xxxx, 303-387-xxxx, 303-388-xxxx, 303-389-xxxx, 303-390-xxxx, 303-391-xxxx, 303-392-xxxx, 303-393-xxxx, 303-394-xxxx, 303-395-xxxx, 303-396-xxxx, 303-397-xxxx, 303-398-xxxx, 303-399-xxxx, 303-400-xxxx, 303-401-xxxx, 303-402-xxxx, 303-403-xxxx, 303-404-xxxx, 303-405-xxxx, 303-406-xxxx, 303-407-xxxx, 303-408-xxxx, 303-409-xxxx, 303-410-xxxx, 303-412-xxxx, 303-413-xxxx, 303-414-xxxx, 303-415-xxxx, 303-416-xxxx, 303-417-xxxx, 303-418-xxxx, 303-419-xxxx, 303-420-xxxx, 303-421-xxxx, 303-422-xxxx, 303-423-xxxx, 303-424-xxxx, 303-425-xxxx, 303-426-xxxx, 303-427-xxxx, 303-428-xxxx, 303-429-xxxx, 303-430-xxxx, 303-431-xxxx, 303-432-xxxx, 303-433-xxxx, 303-434-xxxx, 303-435-xxxx, 303-436-xxxx, 303-437-xxxx, 303-438-xxxx, 303-439-xxxx, 303-440-xxxx, 303-441-xxxx, 303-442-xxxx, 303-443-xxxx, 303-444-xxxx, 303-445-xxxx, 303-446-xxxx, 303-447-xxxx, 303-448-xxxx, 303-449-xxxx, 303-450-xxxx, 303-451-xxxx, 303-452-xxxx, 303-453-xxxx, 303-454-xxxx, 303-455-xxxx, 303-456-xxxx, 303-457-xxxx, 303-458-xxxx, 303-459-xxxx, 303-460-xxxx, 303-461-xxxx, 303-462-xxxx, 303-463-xxxx, 303-464-xxxx, 303-465-xxxx, 303-466-xxxx, 303-467-xxxx, 303-468-xxxx, 303-469-xxxx, 303-470-xxxx, 303-471-xxxx, 303-472-xxxx, 303-473-xxxx, 303-474-xxxx, 303-475-xxxx, 303-476-xxxx, 303-477-xxxx, 303-478-xxxx, 303-479-xxxx, 303-480-xxxx, 303-481-xxxx, 303-482-xxxx, 303-483-xxxx, 303-484-xxxx, 303-485-xxxx, 303-486-xxxx, 303-487-xxxx, 303-488-xxxx, 303-489-xxxx, 303-490-xxxx, 303-491-xxxx, 303-492-xxxx, 303-493-xxxx, 303-494-xxxx, 303-495-xxxx, 303-496-xxxx, 303-497-xxxx, 303-498-xxxx, 303-499-xxxx, 303-500-xxxx, 303-501-xxxx, 303-502-xxxx, 303-503-xxxx, 303-504-xxxx, 303-505-xxxx, 303-506-xxxx, 303-507-xxxx, 303-508-xxxx, 303-509-xxxx, 303-510-xxxx, 303-512-xxxx, 303-513-xxxx, 303-514-xxxx, 303-515-xxxx, 303-516-xxxx, 303-517-xxxx, 303-518-xxxx, 303-519-xxxx, 303-520-xxxx, 303-521-xxxx, 303-522-xxxx, 303-523-xxxx, 303-524-xxxx, 303-525-xxxx, 303-526-xxxx, 303-527-xxxx, 303-528-xxxx, 303-529-xxxx, 303-530-xxxx, 303-531-xxxx, 303-532-xxxx, 303-533-xxxx, 303-534-xxxx, 303-536-xxxx, 303-537-xxxx, 303-538-xxxx, 303-539-xxxx, 303-540-xxxx, 303-541-xxxx, 303-542-xxxx, 303-543-xxxx, 303-544-xxxx, 303-545-xxxx, 303-546-xxxx, 303-547-xxxx, 303-548-xxxx, 303-549-xxxx, 303-550-xxxx, 303-551-xxxx, 303-552-xxxx, 303-553-xxxx, 303-554-xxxx, 303-555-xxxx, 303-556-xxxx, 303-557-xxxx, 303-558-xxxx, 303-559-xxxx, 303-560-xxxx, 303-561-xxxx, 303-562-xxxx, 303-563-xxxx, 303-564-xxxx, 303-565-xxxx, 303-566-xxxx, 303-567-xxxx, 303-568-xxxx, 303-569-xxxx, 303-570-xxxx, 303-571-xxxx, 303-572-xxxx, 303-573-xxxx, 303-574-xxxx, 303-575-xxxx, 303-576-xxxx, 303-577-xxxx, 303-578-xxxx, 303-579-xxxx, 303-580-xxxx, 303-581-xxxx, 303-582-xxxx, 303-583-xxxx, 303-584-xxxx, 303-585-xxxx, 303-586-xxxx, 303-587-xxxx, 303-588-xxxx, 303-589-xxxx, 303-590-xxxx, 303-591-xxxx, 303-592-xxxx, 303-593-xxxx, 303-594-xxxx, 303-595-xxxx, 303-596-xxxx, 303-597-xxxx, 303-598-xxxx, 303-599-xxxx, 303-600-xxxx, 303-601-xxxx, 303-602-xxxx, 303-603-xxxx, 303-604-xxxx, 303-605-xxxx, 303-606-xxxx, 303-607-xxxx, 303-608-xxxx, 303-609-xxxx, 303-610-xxxx, 303-612-xxxx, 303-613-xxxx, 303-614-xxxx, 303-615-xxxx, 303-616-xxxx, 303-617-xxxx, 303-618-xxxx, 303-619-xxxx, 303-620-xxxx, 303-621-xxxx, 303-622-xxxx, 303-623-xxxx, 303-624-xxxx, 303-625-xxxx, 303-626-xxxx, 303-627-xxxx, 303-628-xxxx, 303-629-xxxx, 303-630-xxxx, 303-631-xxxx, 303-632-xxxx, 303-633-xxxx, 303-634-xxxx, 303-635-xxxx, 303-636-xxxx, 303-637-xxxx, 303-638-xxxx, 303-639-xxxx, 303-640-xxxx, 303-641-xxxx, 303-642-xxxx, 303-643-xxxx, 303-644-xxxx, 303-645-xxxx, 303-646-xxxx, 303-647-xxxx, 303-648-xxxx, 303-649-xxxx, 303-650-xxxx, 303-651-xxxx, 303-652-xxxx, 303-653-xxxx, 303-654-xxxx, 303-655-xxxx, 303-656-xxxx, 303-657-xxxx, 303-658-xxxx, 303-659-xxxx, 303-660-xxxx, 303-661-xxxx, 303-662-xxxx, 303-663-xxxx, 303-664-xxxx, 303-665-xxxx, 303-666-xxxx, 303-667-xxxx, 303-668-xxxx, 303-669-xxxx, 303-670-xxxx, 303-671-xxxx, 303-672-xxxx, 303-673-xxxx, 303-674-xxxx, 303-675-xxxx, 303-676-xxxx, 303-677-xxxx, 303-678-xxxx, 303-679-xxxx, 303-680-xxxx, 303-681-xxxx, 303-682-xxxx, 303-683-xxxx, 303-684-xxxx, 303-685-xxxx, 303-686-xxxx, 303-687-xxxx, 303-688-xxxx, 303-689-xxxx, 303-690-xxxx, 303-691-xxxx, 303-692-xxxx, 303-693-xxxx, 303-694-xxxx, 303-695-xxxx, 303-696-xxxx, 303-697-xxxx, 303-698-xxxx, 303-699-xxxx, 303-701-xxxx, 303-702-xxxx, 303-703-xxxx, 303-704-xxxx, 303-705-xxxx, 303-706-xxxx, 303-707-xxxx, 303-708-xxxx, 303-709-xxxx, 303-710-xxxx, 303-712-xxxx, 303-713-xxxx, 303-714-xxxx, 303-715-xxxx, 303-716-xxxx, 303-717-xxxx, 303-718-xxxx, 303-719-xxxx, 303-720-xxxx, 303-721-xxxx, 303-722-xxxx, 303-723-xxxx, 303-724-xxxx, 303-725-xxxx, 303-726-xxxx, 303-727-xxxx, 303-728-xxxx, 303-729-xxxx, 303-730-xxxx, 303-731-xxxx, 303-732-xxxx, 303-733-xxxx, 303-734-xxxx, 303-735-xxxx, 303-736-xxxx, 303-737-xxxx, 303-738-xxxx, 303-739-xxxx, 303-740-xxxx, 303-741-xxxx, 303-742-xxxx, 303-743-xxxx, 303-744-xxxx, 303-745-xxxx, 303-746-xxxx, 303-747-xxxx, 303-748-xxxx, 303-749-xxxx, 303-750-xxxx, 303-751-xxxx, 303-752-xxxx, 303-753-xxxx, 303-754-xxxx, 303-755-xxxx, 303-756-xxxx, 303-757-xxxx, 303-758-xxxx, 303-759-xxxx, 303-760-xxxx, 303-761-xxxx, 303-762-xxxx, 303-763-xxxx, 303-764-xxxx, 303-765-xxxx, 303-766-xxxx, 303-767-xxxx, 303-768-xxxx, 303-769-xxxx, 303-770-xxxx, 303-771-xxxx, 303-772-xxxx, 303-773-xxxx, 303-774-xxxx, 303-775-xxxx, 303-776-xxxx, 303-777-xxxx, 303-778-xxxx, 303-779-xxxx, 303-780-xxxx, 303-781-xxxx, 303-782-xxxx, 303-783-xxxx, 303-784-xxxx, 303-785-xxxx, 303-786-xxxx, 303-787-xxxx, 303-788-xxxx, 303-789-xxxx, 303-790-xxxx, 303-791-xxxx, 303-792-xxxx, 303-793-xxxx, 303-794-xxxx, 303-795-xxxx, 303-796-xxxx, 303-797-xxxx, 303-798-xxxx, 303-799-xxxx, 303-800-xxxx, 303-801-xxxx, 303-802-xxxx, 303-803-xxxx, 303-804-xxxx, 303-805-xxxx, 303-806-xxxx, 303-807-xxxx, 303-808-xxxx, 303-809-xxxx, 303-810-xxxx, 303-812-xxxx, 303-813-xxxx, 303-814-xxxx, 303-815-xxxx, 303-816-xxxx, 303-817-xxxx, 303-818-xxxx, 303-819-xxxx, 303-820-xxxx, 303-821-xxxx, 303-822-xxxx, 303-823-xxxx, 303-824-xxxx, 303-825-xxxx, 303-826-xxxx, 303-827-xxxx, 303-828-xxxx, 303-829-xxxx, 303-830-xxxx, 303-831-xxxx, 303-832-xxxx, 303-833-xxxx, 303-834-xxxx, 303-835-xxxx, 303-836-xxxx, 303-837-xxxx, 303-838-xxxx, 303-839-xxxx, 303-840-xxxx, 303-841-xxxx, 303-842-xxxx, 303-843-xxxx, 303-844-xxxx, 303-845-xxxx, 303-846-xxxx, 303-847-xxxx, 303-848-xxxx, 303-849-xxxx, 303-850-xxxx, 303-851-xxxx, 303-852-xxxx, 303-853-xxxx, 303-854-xxxx, 303-855-xxxx, 303-856-xxxx, 303-857-xxxx, 303-858-xxxx, 303-859-xxxx, 303-860-xxxx, 303-861-xxxx, 303-862-xxxx, 303-863-xxxx, 303-864-xxxx, 303-865-xxxx, 303-866-xxxx, 303-867-xxxx, 303-868-xxxx, 303-869-xxxx, 303-870-xxxx, 303-871-xxxx, 303-872-xxxx, 303-873-xxxx, 303-874-xxxx, 303-875-xxxx, 303-876-xxxx, 303-877-xxxx, 303-878-xxxx, 303-879-xxxx, 303-880-xxxx, 303-881-xxxx, 303-882-xxxx, 303-883-xxxx, 303-884-xxxx, 303-885-xxxx, 303-886-xxxx, 303-887-xxxx, 303-888-xxxx, 303-889-xxxx, 303-890-xxxx, 303-891-xxxx, 303-892-xxxx, 303-893-xxxx, 303-894-xxxx, 303-895-xxxx, 303-896-xxxx, 303-897-xxxx, 303-898-xxxx, 303-899-xxxx, 303-900-xxxx, 303-901-xxxx, 303-902-xxxx, 303-903-xxxx, 303-904-xxxx, 303-905-xxxx, 303-906-xxxx, 303-907-xxxx, 303-908-xxxx, 303-909-xxxx, 303-910-xxxx, 303-912-xxxx, 303-913-xxxx, 303-914-xxxx, 303-915-xxxx, 303-916-xxxx, 303-917-xxxx, 303-918-xxxx, 303-919-xxxx, 303-920-xxxx, 303-921-xxxx, 303-922-xxxx, 303-923-xxxx, 303-924-xxxx, 303-925-xxxx, 303-926-xxxx, 303-927-xxxx, 303-928-xxxx, 303-929-xxxx, 303-930-xxxx, 303-931-xxxx, 303-932-xxxx, 303-933-xxxx, 303-934-xxxx, 303-935-xxxx, 303-936-xxxx, 303-937-xxxx, 303-938-xxxx, 303-939-xxxx, 303-940-xxxx, 303-941-xxxx, 303-942-xxxx, 303-943-xxxx, 303-944-xxxx, 303-945-xxxx, 303-946-xxxx, 303-947-xxxx, 303-948-xxxx, 303-949-xxxx, 303-951-xxxx, 303-952-xxxx, 303-953-xxxx, 303-954-xxxx, 303-955-xxxx, 303-956-xxxx, 303-957-xxxx, 303-960-xxxx, 303-961-xxxx, 303-962-xxxx, 303-963-xxxx, 303-964-xxxx, 303-965-xxxx, 303-966-xxxx, 303-967-xxxx, 303-968-xxxx, 303-969-xxxx, 303-971-xxxx, 303-972-xxxx, 303-973-xxxx, 303-974-xxxx, 303-975-xxxx, 303-977-xxxx, 303-978-xxxx, 303-979-xxxx, 303-980-xxxx, 303-981-xxxx, 303-982-xxxx, 303-984-xxxx, 303-985-xxxx, 303-986-xxxx, 303-987-xxxx, 303-988-xxxx, 303-989-xxxx, 303-990-xxxx, 303-991-xxxx, 303-992-xxxx, 303-993-xxxx, 303-994-xxxx, 303-995-xxxx, 303-996-xxxx, 303-997-xxxx, 303-998-xxxx, 303-999-xxxx
Number of telephone companies42 telephone companies servicing the 303 area code
List of telephone companiesTELEPORT COMMUNICATIONS GROUP - CO, USA MOBILITY WIRELESS, INC., QWEST CORPORATION, AMERICAN MESSAGING (AM), INC., CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO, MCIMETRO ACCESS TRANSMISSION SERVICES LLC, NEXTEL COMMUNICATIONS, INC., CONTACT PAGING OF COLORADO, INC., T-MOBILE USA, INC., NEW CINGULAR WIRELESS PCS, LLC, PAC - WEST TELECOMM, INC. - CO, GLOBAL CROSSING LOCAL SERVICES, INC.-CO, ICG TELECOM GROUP - CO, LEVEL 3 COMMUNICATIONS, LLC - CO, N.E. COLORADO CELLULAR, INC., MCLEODUSA TELECOMMUNICATIONS SERVICES, INC.- CO, SPRINT SPECTRUM L.P., AT&T LOCAL, CONVERGENT COMMUNICATIONS, INC. - CO, COMCAST PHONE OF COLORADO, LLC - CO, XO COLORADO, LLC, ELBERT COUNTY WIRELESS, LLC, 360NETWORKS (USA) INC. - CO, CBEYOND COMMUNICATIONS, LLC-CO, TIME WARNER TELECOM OF COLORADO LLC-CO, LIVE WIRE NETWORKS, INC. - CO, WINSTAR COMMUNICATIONS, LLC - CO, COMMPARTNERS, LLC - CO, ESCHELON TELECOM OF COLORADO, INC. - CO, 4DVISION, LLC - CO, STRASBURG TELEPHONE CO., EASTERN SLOPE RURAL TELEPHONE ASSOCIATION, INC., BIG RIVER TELEPHONE COMPANY, LLC - MO, COMMUNICATIONS UNLIMITED, YMAX COMMUNICATIONS CORP. - CO, BIJOU TELEPHONE COOPERATIVE ASSOCIATION, INC., INTERLINK ADV SVC D/B/A FORETHOUGHT.NET - CO, ROGGEN TELEPHONE COOPERATIVE CO., ILOKA, INC. DBA MICROTECH-TEL - CO, NEXTWAVE TELECOM, INC DBA NEXTWAVE WIRELESS, ALLEGIANCE TELECOM OF COLORADO, INC., NEUTRAL TANDEM-COLORADO, LLC - CO

303 Area Code Map

 
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