Active Prefixes in Area Code 603
| Prefix | Primary City | Phone Type | Company |
|---|---|---|---|
| 603-332-#### | Rochester | Landline Numbers | No New England Tel O... |
| 603-334-#### | Portsmouth | Landline Numbers | No New England Tel O... |
| 603-335-#### | Rochester | Landline Numbers | No New England Tel O... |
| 603-336-#### | Hinsdale | Landline Numbers | No New England Tel O... |
| 603-337-#### | Rochester | Landline Numbers | No New England Tel O... |
| 603-338-#### | Keene | Landline Numbers | Brooks Fiber Communi... |
| 603-339-#### | Derry | Wireless Numbers | New Cingular Wireles... |
| 603-340-#### | Suncook | Landline Numbers | Bell Atlantic Nynex ... |
| 603-341-#### | Merrimack | Wireless Numbers | United States Cellul... |
| 603-342-#### | Berlin | Landline Numbers | No New England Tel O... |
| 603-343-#### | Dover | Landline Numbers | Comcast Phone Of New... |
| 603-344-#### | Suncook | Wireless Numbers | United States Cellul... |
| 603-345-#### | Merrimack | Wireless Numbers | United States Cellul... |
| 603-346-#### | Plymouth | Landline Numbers | Level 3 Communicatio... |
| 603-347-#### | Kingston | Landline Numbers | Comcast Phone Of New... |
| 603-348-#### | North Woodstock | Wireless Numbers | United States Cellul... |
| 603-349-#### | West Lebanon | Wireless Numbers | United States Cellul... |
| 603-350-#### | East Rochester | Landline Numbers | Brooks Fiber Communi... |
| 603-351-#### | Manchester | Landline Numbers | Brooks Fiber Communi... |
| 603-352-#### | Keene | Landline Numbers | No New England Tel O... |
| 603-353-#### | Orford | Landline Numbers | No New England Tel O... |
| 603-354-#### | Keene | Landline Numbers | No New England Tel O... |
| 603-355-#### | Keene | Landline Numbers | No New England Tel O... |
| 603-356-#### | North Conway | Landline Numbers | No New England Tel O... |
| 603-357-#### | Keene | Landline Numbers | No New England Tel O... |
| 603-358-#### | Keene | Landline Numbers | No New England Tel O... |
| 603-359-#### | Lebanon | Landline Numbers | Bell Atlantic Nynex ... |
| 603-360-#### | Orford | Landline Numbers | Topsham Communicatio... |
| 603-361-#### | Manchester | Landline Numbers | Bell Atlantic Nynex ... |
| 603-362-#### | Hampstead | Landline Numbers | No New England Tel O... |
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 | |