There are 756 phone number prefixes within area code 603. Additionally, there are more than 4,100 phone numbers in this area code that have received at least one user report. The location of calls from area code 603 is New Hampshire, USA. Most numbers in this area code are in US Eastern time, where the time is currently 12:51:00 AM on June 8, 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 |
|---|---|---|
| 603-814 | Seabrook, NH | Comcast Ip Phone, Llc |
| 603-815 | Durham, NH | Teleport Communications America, Llc - Nh |
| 603-816 | Nashua, NH | Freedom Ring Communications, Llc |
| 603-817 | Dover, NH | Sprint Spectrum, L.p. |
| 603-818 | Derry, NH | Sprint Spectrum, L.p. |
| 603-819 | Plaistow, NH | Level 3 Communications, Llc - Nh |
| 603-820 | Merrimack, NH | Metropcs, Inc. |
| 603-821 | Nashua, NH | Conversent Communications Of New Hampshire, Llc |
| 603-822 | Rochester, NH | Choice One Of New Hampshire, Inc. |
| 603-823 | Franconia, NH | Consolidated Comm Of No. New England-nh |
| 603-824 | Salem, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-825 | Manchester, NH | Ton80 Communications, Llc |
| 603-826 | Charlestown, NH | Consolidated Comm Of No. New England-nh |
| 603-827 | Harrisville, NH | Consolidated Comm Of No. New England-nh |
| 603-828 | Portsmouth, NH | Bell Atlantic Mobile, Inc |
| 603-829 | Sunapee, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-831 | Greenfield, NH | Bell Atlantic Mobile, Inc |
| 603-832 | Laconia, NH | Lightship Telecom, Llc - Nh |
| 603-833 | Rochester, NH | Bell Atlantic Mobile, Inc |
| 603-834 | Dover, NH | Conversent Communications Of New Hampshire, Llc |
| 603-835 | Alstead, NH | Consolidated Comm Of No. New England-nh |
| 603-836 | Manchester, NH | Comcast Ip Phone, Llc |
| 603-837 | Whitefield, NH | Consolidated Comm Of No. New England-nh |
| 603-838 | Lisbon, NH | Consolidated Comm Of No. New England-nh |
| 603-839 | Farmington, NH | Crc Communications Of Maine, Inc. - Nh |
| 603-840 | Epsom, NH | Comcast Ip Phone, Llc |
| 603-841 | Somersworth, NH | Comcast Ip Phone, Llc |
| 603-842 | Dover, NH | Paetec Communications, Inc. - Nh |
| 603-843 | Newport, NH | Freedom Ring Communications, Llc |
| 603-845 | Derry, NH | Lightship Telecom, Llc - Nh |
| 603-846 | Twin Mountain, NH | Consolidated Comm Of No. New England-nh |
| 603-847 | Sullivan, NH | Consolidated Comm Of No. New England-nh |
| 603-848 | Concord, NH | United States Cellular - Nh |
| 603-850 | Lisbon, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-851 | Manchester, NH | Bell Atlantic Mobile, Inc |
| 603-852 | Keene, NH | Omnipoint Miami E License, Llc |
| 603-853 | Woodsville, NH | Freedom Ring Communications, Llc |
| 603-854 | Manchester, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-855 | Alton, NH | Idt America, Corp. - Nh |
| 603-856 | Concord, NH | Choice One Of New Hampshire, Inc. |
| 603-857 | Suncook, NH | Bell Atlantic Mobile, Inc |
| 603-858 | Manchester, NH | Omnipoint Miami E License, Llc |
| 603-859 | New Durham, NH | Union Tel. Co. |
| 603-860 | Manchester, NH | Bell Atlantic Mobile, Inc |
| 603-861 | Tamworth, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-862 | Durham, NH | Paetec Communications, Inc. - Nh |
| 603-863 | Newport, NH | Consolidated Comm Of No. New England-nh |
| 603-864 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-865 | Newport, NH | Consolidated Comm Of No. New England-nh |
| 603-866 | Dover, NH | Omnipoint Miami E License, Llc |
| 603-867 | Manchester, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-868 | Durham, NH | Consolidated Comm Of No. New England-nh |
| 603-869 | Bethlehem, NH | Consolidated Comm Of No. New England-nh |
| 603-870 | Salem, NH | Consolidated Comm Of No. New England-nh |
| 603-871 | Sanbornville, NH | Level 3 Communications, Llc - Nh |
| 603-872 | Gilmanton Iron Works, NH | Idt America, Corp. - Nh |
| 603-873 | Sunapee, NH | Level 3 Communications, Llc - Nh |
| 603-874 | Monroe, NH | Level 3 Communications, Llc - Nh |
| 603-875 | Alton, NH | Union Tel. Co. |
| 603-876 | Marlborough, NH | Consolidated Comm Of No. New England-nh |
| 603-877 | New London, NH | Comcast Ip Phone, Llc |
| 603-878 | Greenville, NH | Consolidated Comm Of No. New England-nh |
| 603-879 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-880 | Nashua, NH | Telnyx Llc |
| 603-881 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-882 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-883 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-884 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-885 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-886 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-887 | Chester, NH | Granite State Tel., Inc. |
| 603-888 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-889 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-890 | Salem, NH | Consolidated Comm Of No. New England-nh |
| 603-891 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-892 | Concord, NH | Omnipoint Miami E License, Llc |
| 603-893 | Salem, NH | Consolidated Comm Of No. New England-nh |
| 603-894 | Salem, NH | Consolidated Comm Of No. New England-nh |
| 603-895 | Raymond, NH | Consolidated Comm Of No. New England-nh |
| 603-896 | Salem, NH | Consolidated Comm Of No. New England-nh |
| 603-897 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-898 | Salem, NH | Consolidated Comm Of No. New England-nh |
| 603-899 | Rindge, NH | Consolidated Comm Of No. New England-nh |
| 603-900 | Newport, NH | Fractel, Llc |
| 603-901 | Conway, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-902 | Sutton, NH | Comcast Ip Phone, Llc |
| 603-903 | Keene, NH | Crc Communications Of Maine, Inc. - Nh |
| 603-904 | Walpole, NH | Otel Telekom, Inc. - Nh |
| 603-905 | Barrington, NH | Otel Telekom, Inc. - Nh |
| 603-906 | Barnstead, NH | Idt America, Corp. - Nh |
| 603-910 | Hampton, NH | Conversent Communications Of New Hampshire, Llc |
| 603-911 | New Hampshire | |
| 603-912 | Salem, NH | Terra Nova Telecom Inc. |
| 603-913 | Merrimack, NH | Paetec Communications, Inc. - Nh |
| 603-915 | Gorham, NH | Bell Atlantic Mobile, Inc |
| 603-918 | Hampton, NH | Bell Atlantic Mobile, Inc |
| 603-921 | Nashua, NH | Bell Atlantic Mobile, Inc |
| 603-922 | North Stratford, NH | Consolidated Comm Of No. New England-nh |
| 603-923 | Rochester, NH | Level 3 Communications, Llc - Nh |
| 603-924 | Peterborough, NH | Consolidated Comm Of No. New England-nh |
June 6, 2025