Active Prefixes in Area Code 603
| Prefix | Primary City | Phone Type | Company |
|---|---|---|---|
| 603-235-#### | Derry | Wireless Numbers | Sprint Spectrum L.p.... |
| 603-236-#### | Wonalancet | Landline Numbers | No New England Tel O... |
| 603-237-#### | Colebrook | Landline Numbers | No New England Tel O... |
| 603-238-#### | Plymouth | Landline Numbers | Paetec Communication... |
| 603-239-#### | Winchester | Landline Numbers | No New England Tel O... |
| 603-240-#### | Manchester | Landline Numbers | No New England Tel O... |
| 603-241-#### | Manchester | Landline Numbers | No New England Tel O... |
| 603-242-#### | Troy | Landline Numbers | No New England Tel O... |
| 603-243-#### | Woodsville | Landline Numbers | Charter Fiberlink Nh... |
| 603-244-#### | Manchester | Landline Numbers | Comcast Phone Of New... |
| 603-245-#### | Portsmouth | Landline Numbers | No New England Tel O... |
| 603-246-#### | Colebrook | Landline Numbers | No New England Tel O... |
| 603-247-#### | Derry | Wireless Numbers | New Cingular Wireles... |
| 603-248-#### | Dover | Landline Numbers | No New England Tel O... |
| 603-249-#### | Milford | Landline Numbers | No New England Tel O... |
| 603-250-#### | Meredith | Landline Numbers | Freedom Ring Communi... |
| 603-251-#### | Salem | Landline Numbers | Paetec Communication... |
| 603-252-#### | West Lebanon | Wireless Numbers | United States Cellul... |
| 603-253-#### | Meredith | Landline Numbers | No New England Tel O... |
| 603-254-#### | Plymouth | Wireless Numbers | United States Cellul... |
| 603-255-#### | Colebrook | Landline Numbers | Dixville Telephone C... |
| 603-256-#### | West Chesterfield | Landline Numbers | No New England Tel O... |
| 603-257-#### | Plaistow | Landline Numbers | Freedom Ring Communi... |
| 603-259-#### | Littleton | Landline Numbers | Level 3 Communicatio... |
| 603-260-#### | Derry | Landline Numbers | Bell Atlantic Nynex ... |
| 603-261-#### | Merrimack | Wireless Numbers | United States Cellul... |
| 603-262-#### | Merrimack | Landline Numbers | No New England Tel O... |
| 603-263-#### | Manchester | Landline Numbers | Brooks Fiber Communi... |
| 603-264-#### | Manchester | Wireless Numbers | Omnipoint Miami E Li... |
| 603-265-#### | New Boston | Wireless Numbers | Omnipoint Miami E Li... |
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 | |