Active Prefixes in Area Code 603
| Prefix | Primary City | Phone Type | Company |
|---|---|---|---|
| 603-363-#### | Chesterfield | Landline Numbers | No New England Tel O... |
| 603-364-#### | Gilmanton | Wireless Numbers | Union Telephone Co. ... |
| 603-365-#### | Merrimack | Wireless Numbers | Sprint Spectrum L.p.... |
| 603-366-#### | Laconia | Landline Numbers | No New England Tel O... |
| 603-367-#### | Madison | Landline Numbers | No New England Tel O... |
| 603-369-#### | Concord | Landline Numbers | Level 3 Communicatio... |
| 603-370-#### | Candia | Landline Numbers | Bell Atlantic Nynex ... |
| 603-371-#### | Peterborough | Landline Numbers | Conversent Communica... |
| 603-372-#### | Claremont | Landline Numbers | Freedom Ring Communi... |
| 603-373-#### | Portsmouth | Landline Numbers | Conversent Communica... |
| 603-374-#### | Bartlett | Landline Numbers | No New England Tel O... |
| 603-375-#### | Ashland | Landline Numbers | Time Warner Cable In... |
| 603-376-#### | Dover | Landline Numbers | No New England Tel O... |
| 603-377-#### | Merrimack | Wireless Numbers | Omnipoint Miami E Li... |
| 603-378-#### | Plaistow | Landline Numbers | No New England Tel O... |
| 603-379-#### | Rye | Landline Numbers | Brooks Fiber Communi... |
| 603-380-#### | Portsmouth | Wireless Numbers | New Cingular Wireles... |
| 603-381-#### | West Lebanon | Wireless Numbers | United States Cellul... |
| 603-382-#### | Plaistow | Landline Numbers | No New England Tel O... |
| 603-383-#### | Jackson | Landline Numbers | No New England Tel O... |
| 603-384-#### | Manchester | Landline Numbers | Comcast Phone Of New... |
| 603-385-#### | Manchester | Landline Numbers | No New England Tel O... |
| 603-386-#### | Nashua | Landline Numbers | Broadview Networks, ... |
| 603-387-#### | Laconia | Landline Numbers | Bell Atlantic Nynex ... |
| 603-388-#### | Colebrook | Landline Numbers | Freedom Ring Communi... |
| 603-389-#### | Durham | Landline Numbers | Choice One Communica... |
| 603-390-#### | Jefferson | Landline Numbers | Brooks Fiber Communi... |
| 603-391-#### | Manchester | Landline Numbers | Tcg New Jersey, Inc.... |
| 603-392-#### | Winchester | Landline Numbers | Comcast Phone Of New... |
| 603-393-#### | Laconia | Wireless Numbers | United States Cellul... |
Area Code 603 Introduction
| Area Code: | 603 |
| Country: | United States |
| State/Province: | New Hampshire - NH |
| Major City: | Manchester |
| Time Zone: | Eastern |
| Average property | $256K |
| Average age | 53 y/o |
| Average assets | $60.1K |
| Population density | 9,349 sq mi (24,214 km2) |
| Population | 1,330,608 |
| latitude Longitude: | |
| 42° 42′ N to 45° 18′ N / 70° 36′ W to 72° 33′ W | |
| About 603 : | |
| The 603 Area Code (or Area Code 603) is located in the state of NH. Area Code 603 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 1.44 million unique phone numbers and 5.14 million individuals near the city of Newmarket |
|
| Major cities or places | |
| Derry, NH>Dover, NH>Keene, NH>Manchester, NH>Nashua, NH>Portsmouth, NH>Rochester, NH | |