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Area Code 303

There are 800 phone number prefixes within area code 303. Additionally, there are more than 8,000 phone numbers in this area code that have received at least one user report. The location of calls from area code 303 is Colorado, USA. Most numbers in this area code are in US Mountain time, where the time is currently 6:38:38 AM on September 14, 2025.
 
Choose a phone number from the list below to browse user reports for . You can also use the search box above to search for user reports about any phone number, or to file a report about any phone number.

Prefix City / State Primary Telco
303-900 Georgetown, CO Level 3 Communications, Llc - Co
303-901 Denver, CO Sprint Spectrum, L.p.
303-902 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-903 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-904 Denver, CO Qwest Corporation
303-905 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-906 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-907 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-908 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-909 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-910 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-911 Colorado
303-912 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-913 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-914 Denver, CO Qwest Corporation
303-915 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-916 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-917 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-918 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-919 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-920 Denver, CO Qwest Corporation
303-921 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-922 Denver, CO Qwest Corporation
303-923 Denver, CO Level 3 Communications, Llc - Co
303-924 Denver, CO Qwest Corporation
303-925 Denver, CO Qwest Corporation
303-926 Denver, CO Qwest Corporation
303-927 Denver, CO Teleport Communications America, Llc - Co
303-928 Denver, CO Mcimetro Access Transmission Services Llc
303-929 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-930 Denver, CO Qwest Corporation
303-931 Denver, CO T-mobile Usa, Inc.
303-932 Denver, CO Qwest Corporation
303-933 Denver, CO Qwest Corporation
303-934 Denver, CO Qwest Corporation
303-935 Denver, CO Qwest Corporation
303-936 Denver, CO Qwest Corporation
303-937 Denver, CO Qwest Corporation
303-938 Denver, CO Qwest Corporation
303-939 Denver, CO Qwest Corporation
303-940 Denver, CO Qwest Corporation
303-941 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-942 Denver, CO Teleport Communications America, Llc - Co
303-943 Denver, CO Skye Telecom Llc Dba Skyetel
303-944 Denver, CO Sprint Spectrum, L.p.
303-945 Denver, CO Comcast Ip Phone, Llc
303-946 Denver, CO Sprint Spectrum, L.p.
303-947 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-948 Denver, CO Qwest Corporation
303-949 Denver, CO Sprint Spectrum, L.p.
303-950 Colorado
303-951 Denver, CO Level 3 Communications, Llc - Co
303-952 Denver, CO Level 3 Communications, Llc - Co
303-953 Denver, CO Level 3 Communications, Llc - Co
303-954 Denver, CO Level 3 Communications, Llc - Co
303-955 Denver, CO Global Crossing Local Services, Inc. - Co
303-956 Fort Lupton, CO New Cingular Wireless Pcs, Llc
303-957 Denver, CO Global Crossing Local Services, Inc. - Co
303-958 Colorado
303-959 Colorado
303-960 Denver, CO T-mobile Usa, Inc.
303-961 Denver, CO Sprint Spectrum, L.p.
303-962 Denver, CO Onvoy, Llc - Co
303-963 Denver, CO Level 3 Communications, Llc - Co
303-964 Denver, CO Qwest Corporation
303-965 Denver, CO Qwest Corporation
303-966 Denver, CO Qwest Corporation
303-967 Denver, CO Qwest Corporation
303-968 Denver, CO Mcimetro Access Transmission Services Llc
303-969 Denver, CO Qwest Corporation
303-970 Deckers, CO Onvoy, Llc - Co
303-971 Denver, CO Qwest Corporation
303-972 Denver, CO Qwest Corporation
303-973 Denver, CO Qwest Corporation
303-974 Denver, CO Global Crossing Local Services, Inc. - Co
303-975 Denver, CO Qwest Corporation
303-976 Colorado
303-977 Denver, CO Qwest Corporation
303-978 Denver, CO Qwest Corporation
303-979 Denver, CO Qwest Corporation
303-980 Denver, CO Qwest Corporation
303-981 Denver, CO Cellco Partnership Dba Verizon Wireless - Co
303-982 Denver, CO Qwest Corporation
303-983 Colorado
303-984 Denver, CO Qwest Corporation
303-985 Denver, CO Qwest Corporation
303-986 Denver, CO Qwest Corporation
303-987 Denver, CO Qwest Corporation
303-988 Denver, CO Qwest Corporation
303-989 Denver, CO Qwest Corporation
303-990 Fort Lupton, CO Sprint Spectrum, L.p.
303-991 Denver, CO Xo Colorado, Llc
303-992 Denver, CO Qwest Corporation
303-993 Denver, CO Onvoy, Llc - Co
303-994 Denver, CO Sprint Spectrum, L.p.
303-995 Denver, CO Sprint Spectrum, L.p.
303-996 Denver, CO Electric Lightwave Llc Dba Allstream
303-997 Denver, CO Comcast Ip Phone, Llc
303-998 Denver, CO Qwest Corporation
303-999 Denver, CO Comcast Ip Phone, Llc

Recent Call Explore
User Reports

888-712-4196
September 13, 2025
Claimed to be a home warranty company. The letter received had no company name or business address. ...
888-712-4196
September 10, 2025
scam letter pretending to be my mortgage company, threatening to remove "service", etc
888-712-4196
September 9, 2025
Scam!! Pretending to be my mortgage holder and asked me to call to buy warranty.
804-500-1673
September 4, 2025
Suspected scam or spam. My area is serviced by Spectrum.
888-712-4196
September 3, 2025
Received a letter impersonating to the our mortgage lender. It stated this is the final notice for t ...