There are 800 phone number prefixes within area code 203. Additionally, there are more than 2,000 phone numbers in this area code that have received at least one user report. The location of calls from area code 203 is Connecticut, USA. Most numbers in this area code are in US Eastern time, where the time is currently 1:52:29 AM on February 5, 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 |
|---|---|---|
| 203-800 | New Haven, CT | Sprint Spectrum, L.p. |
| 203-801 | New Canaan, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-802 | Waterbury, CT | Metropcs, Inc. |
| 203-803 | Norwalk, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-804 | New Haven, CT | New Cingular Wireless Pcs, Llc - Dc |
| 203-805 | Waterbury, CT | Teleport Communications America, Llc - Ct |
| 203-806 | Cheshire, CT | Teleport Communications America, Llc - Ct |
| 203-807 | Norwalk, CT | New Cingular Wireless Pcs, Llc - Dc |
| 203-808 | Waterbury, CT | Omnipoint Communications, Inc. - Ct |
| 203-809 | New Haven, CT | Omnipoint Communications, Inc. - Ct |
| 203-810 | Norwalk, CT | Cablevision Lightpath, Inc. - Ct |
| 203-811 | Connecticut | |
| 203-812 | New Haven, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-813 | Byram, CT | Tc Systems, Inc. - Ny |
| 203-814 | Bridgeport, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-815 | New Haven, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-816 | Trumbull, CT | Global Crossing Local Services, Inc. - Ct |
| 203-817 | Stamford, CT | Cablevision Lightpath, Inc. - Ct |
| 203-818 | Norwalk, CT | Mcimetro Access Transmission Services Llc - Ct |
| 203-819 | Waterbury, CT | New Cingular Wireless Pcs, Llc - Dc |
| 203-820 | Norwalk, CT | Sprint Spectrum, L.p. |
| 203-821 | New Haven, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-822 | Norwalk, CT | At&t - Local |
| 203-823 | New Haven, CT | Comcast Ip Phone, Llc |
| 203-824 | New Haven, CT | New Cingular Wireless Pcs, Llc - Dc |
| 203-825 | Danbury, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-826 | Danbury, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-827 | Old Greenwich, CT | Mcimetro Access Transmission Services Llc - Ct |
| 203-828 | Seymour, CT | Global Crossing Local Services, Inc. - Ct |
| 203-829 | Norwalk, CT | Sprint Spectrum, L.p. |
| 203-830 | Danbury, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-831 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-832 | Stamford, CT | New Cingular Wireless Pcs, Llc - Dc |
| 203-833 | New Haven, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-834 | Wilton, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-835 | Norwalk, CT | Usa Mobility Wireless, Inc. |
| 203-836 | New Haven, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-837 | Danbury, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-838 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-839 | Norwalk, CT | Usa Mobility Wireless, Inc. |
| 203-840 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-841 | Waterbury, CT | Choice One Communications, Inc. - Ct |
| 203-842 | Norwalk, CT | Global Crossing Local Services, Inc. - Ct |
| 203-843 | New Haven, CT | At&t - Local |
| 203-844 | Fairfield, CT | Mcimetro Access Transmission Services Llc - Ct |
| 203-845 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-846 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-847 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-848 | New Haven, CT | Conversent Communications Of Connecticut, Llc - Ct |
| 203-849 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-850 | New Haven, CT | Metropcs, Inc. |
| 203-851 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-852 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-853 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-854 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-855 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-856 | Norwalk, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-857 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-858 | Norwalk, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-859 | New Haven, CT | Mcimetro Access Transmission Services Llc |
| 203-860 | Connecticut | |
| 203-861 | Greenwich, CT | Verizon New York, Inc. |
| 203-862 | Greenwich, CT | Verizon New York, Inc. |
| 203-863 | Greenwich, CT | Verizon New York, Inc. |
| 203-864 | Bridgeport, CT | Sprint Spectrum, L.p. |
| 203-865 | New Haven, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-866 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-867 | New Haven, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-868 | New Haven, CT | At&t - Local |
| 203-869 | Greenwich, CT | Verizon New York, Inc. |
| 203-870 | Bridgeport, CT | Cablevision Lightpath, Inc. - Ct |
| 203-871 | Branford, CT | Teleport Communications America, Llc - Ct |
| 203-872 | Cheshire, CT | At&t - Local |
| 203-873 | Bridgeport, CT | New Cingular Wireless Pcs, Llc - Dc |
| 203-874 | Milford, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-875 | Darien, CT | At&t - Local |
| 203-876 | Milford, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-877 | Milford, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-878 | Milford, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-879 | Wolcott, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-880 | Trumbull, CT | Teleport Communications America, Llc - Ct |
| 203-881 | Seymour, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-882 | Milford, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-883 | Stamford, CT | Level 3 Communications, Llc - Ct |
| 203-884 | Guilford, CT | Global Crossing Local Services, Inc. - Ct |
| 203-885 | Danbury, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-886 | Meriden, CT | Choice One Communications, Inc. - Ct |
| 203-887 | New Haven, CT | Sprint Spectrum, L.p. |
| 203-888 | Seymour, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-889 | New Haven, CT | Global Crossing Local Services, Inc. - Ct |
| 203-890 | Stamford, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-891 | New Haven, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-892 | Ansonia-derby, CT | Omnipoint Communications, Inc. - Ct |
| 203-893 | Ansonia-derby, CT | Cellco Partnership Dba Verizon Wireless - Ct |
| 203-894 | Ridgefield, CT | Southern New England Telco Dba Frontier Comm Of Ct |
| 203-895 | Trumbull, CT | New Cingular Wireless Pcs, Llc - Dc |
| 203-896 | Madison, CT | Global Crossing Local Services, Inc. - Ct |
| 203-897 | Stamford, CT | Mcimetro Access Transmission Services Llc - Ct |
| 203-898 | Darien, CT | Mcimetro Access Transmission Services Llc - Ct |
| 203-899 | Norwalk, CT | Southern New England Telco Dba Frontier Comm Of Ct |
February 4, 2025