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Area Codes > 720 > Central Office Codes

Exchange Rate Center State Operating Company
720-904 DENVER CO QWEST CORPORATION
720-907 DENVERSLVN CO GLOBAL CROSSING LOCAL SERVICES, INC.-CO
720-911 CO
720-913 DENVER CO ICG TELECOM GROUP - CO
720-917 DENVER CO QWEST CORPORATION
720-920 DENVER CO TELEPORT COMMUNICATIONS GROUP - CO
720-921 DENVER CO ICG TELECOM GROUP - CO
720-922 DENVER CO QWEST CORPORATION
720-924 DECKERS CO QWEST CORPORATION
720-929 DENVER CO QWEST CORPORATION
720-931 DENVER CO QWEST CORPORATION
720-932 DENVER CO QWEST CORPORATION
720-933 DENVER CO T-MOBILE USA, INC.
720-934 DENVER CO T-MOBILE USA, INC.
720-935 DENVER CO T-MOBILE USA, INC.
720-936 DENVER CO T-MOBILE USA, INC.
720-937 DENVER CO T-MOBILE USA, INC.
720-938 DENVER CO T-MOBILE USA, INC.
720-939 DENVER CO T-MOBILE USA, INC.
720-940 DENVER CO SPRINT SPECTRUM L.P.
720-941 DENVER CO QWEST CORPORATION
720-942 DENVER CO QWEST CORPORATION
720-943 DENVER CO GLOBAL CROSSING LOCAL SERVICES, INC.-CO
720-944 DENVER CO QWEST CORPORATION
720-945 DENVER CO QWEST CORPORATION
720-946 DENVER CO QWEST CORPORATION
720-947 DENVER CO QWEST CORPORATION
720-949 AURORA CO AT&T LOCAL
720-950 CO
720-951 AURORA CO CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
720-956 DENVER CO QWEST CORPORATION
720-958 CO
720-959 CO
720-961 DENVER CO GLOBAL CROSSING LOCAL SERVICES, INC.-CO
720-962 DENVER CO QWEST CORPORATION
720-963 DENVER CO QWEST CORPORATION
720-971 DENVER CO SPRINT SPECTRUM L.P.
720-972 DENVER CO QWEST CORPORATION
720-974 DENVER CO ESCHELON TELECOM OF COLORADO, INC. - CO
720-975 AURORA CO ESCHELON TELECOM OF COLORADO, INC. - CO
720-976 CO
720-977 DENVER CO QWEST CORPORATION
720-979 DENVER CO SPRINT SPECTRUM L.P.
720-980 DENVER CO SPRINT SPECTRUM L.P.
720-981 DENVER CO QWEST CORPORATION
720-982 DENVER CO SPRINT SPECTRUM L.P.
720-983 CO
720-984 DENVER CO SPRINT SPECTRUM L.P.
720-985 DENVER CO SPRINT SPECTRUM L.P.
720-987 DENVER CO SPRINT SPECTRUM L.P.
720-988 DENVER CO SPRINT SPECTRUM L.P.
720-989 DENVER CO SPRINT SPECTRUM L.P.
720-998 AURORA CO COMCAST PHONE OF COLORADO, LLC - CO