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Area Codes > 857 > Central Office Codes

Exchange Rate Center State Operating Company
857-888 EVERETT MA SPRINT SPECTRUM L.P.
857-891 BOSTON MA OMNIPOINT MIAMI E LICENSE, LLC
857-911 MA
857-919 BRIGHTON MA OMNIPOINT MIAMI E LICENSE, LLC
857-920 MA
857-928 CAMBRIDGE MA OMNIPOINT MIAMI E LICENSE, LLC
857-931 BOSTON MA VERIZON NEW ENGLAND INC.
857-932 MA
857-939 QUINCY MA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA
857-940 MA
857-950 MA
857-958 MA
857-959 MA
857-976 MA
857-991 BOSTON MA COMCAST PHONE OF MASSACHUSETTS, INC. - MA
857-995 SOMERVILLE MA BROADWING COMMUNICATIONS, LLC - MA
857-996 BOSTON MA VERIZON NEW ENGLAND INC.
857-997 SOMERVILLE MA RNK, INC.
857-998 CAMBRIDGE MA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA