Area Code 303 — Carriers, Line Types & Portability

Carrier breakdown and line-type data for area code 303 (CO), across 521 analyzed numbers. Useful for bulk-validating 303 calling lists and spotting VoIP/ported numbers before you dial or text.

Carriers in area code 303

CarrierNumbers analyzed
Verizon Wireless245
AT&T140
T-Mobile132
Bandwidth.com2
CenturyLink2

Line types in 303

Line typeNumbers analyzed
WIRELESS517
CLEC2
RBOC2

Top rate centers

Rate centerNumbers analyzed
DENVER474
FORTLUPTON30
LONGMONT17

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