Telephone Area 603. .
Prefix: +1603
This prefix is distributed within the state New Hampshire
The largest city in the region is Manchester
Time Zone: Eastern
Winter time: UTC-5
Summer time: UTC-4
Below on the map, there is indicated the largest city in the telephone area +1-603-...-.... New Hampshire Manchester.
Phone numbers +1-603-YYY-YYYY
| Company | District | Major City | Prefix |
|---|---|---|---|
| New Cingular Wireless PCS - DC | Hillsborough | Manchester, NH | +1-603203-SSSS |
| United States Cellular Corp. - New Hampshire | Hillsborough | Nashua, NH | +1-603204-SSSS |
| Omnipoint Miami E License | Rockingham | Portsmouth, NH | +1-603205-SSSS |
| Paetec Communications | Hillsborough | Manchester, NH | +1-603206-SSSS |
| United States Cellular Corp. - New Hampshire | Grafton | Lyme, NH | +1-603208-SSSS |
| United States Cellular Corp. - New Hampshire | Cheshire | Keene, NH | +1-603209-SSSS |
| Comcast Phone Of New Hampshire | Hillsborough | Manchester, NH | +1-603210-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Rockingham | Salem, NH | +1-603212-SSSS |
| +1-603213-SSSS | |||
| Freedom Ring Communications | Coos | Errol, NH | +1-603214-SSSS |
| Freedom Ring Communications | Coos | Berlin, NH | +1-603215-SSSS |
| Comcast Phone Of New Hampshire | Hillsborough | Manchester, NH | +1-603216-SSSS |
| Rnk | Grafton | Bristol, NH | +1-603217-SSSS |
| Broadview Networks | Hillsborough | Manchester, NH | +1-603218-SSSS |
| Sprint Spectrum L.p. | Merrimack | Concord, NH | +1-603219-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Hillsborough | Nashua, NH | +1-603221-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Hillsborough | Manchester, NH | +1-603222-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603223-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603224-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603225-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603226-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603227-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603228-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603229-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603230-SSSS |
| Nextel Communications | Rockingham | Derry, NH | +1-603231-SSSS |
| Comcast Phone Of New Hampshire | Hillsborough | Manchester, NH | +1-603232-SSSS |
| Omnipoint Miami E License | Hillsborough | Nashua, NH | +1-603233-SSSS |
| Nextel Communications | Rockingham | Derry, NH | +1-603234-SSSS |
| Nextel Communications | Rockingham | Derry, NH | +1-603235-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Carroll | Wonalancet, NH | +1-603236-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Coos | Colebrook, NH | +1-603237-SSSS |
| Paetec Communications | Grafton | Plymouth, NH | +1-603238-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Cheshire | Winchester, NH | +1-603239-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Hillsborough | Manchester, NH | +1-603240-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Hillsborough | Manchester, NH | +1-603241-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Cheshire | Troy, NH | +1-603242-SSSS |
| Comcast Phone Of New Hampshire | Hillsborough | Manchester, NH | +1-603244-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Rockingham | Portsmouth, NH | +1-603245-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Coos | Colebrook, NH | +1-603246-SSSS |
| New Cingular Wireless PCS - DC | Rockingham | Derry, NH | +1-603247-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Strafford | Dover, NH | +1-603248-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Hillsborough | Milford, NH | +1-603249-SSSS |
| Freedom Ring Communications | Belknap | Meredith, NH | +1-603250-SSSS |
| Global Naps | Rockingham | Salem, NH | +1-603251-SSSS |
| United States Cellular Corp. - New Hampshire | Grafton | W Lebanon, NH | +1-603252-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Belknap | Meredith, NH | +1-603253-SSSS |
| United States Cellular Corp. - New Hampshire | Grafton | Plymouth, NH | +1-603254-SSSS |
| Dixville Telephone Co. | Coos | Colebrook, NH | +1-603255-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Cheshire | West Chesterfield, NH | +1-603256-SSSS |
| Freedom Ring Communications | Rockingham | Plaistow, NH | +1-603257-SSSS |
| Global Naps | Hillsborough | Peterborough, NH | +1-603258-SSSS |
| Level 3 Communications | Grafton | Littleton, NH | +1-603259-SSSS |
| United States Cellular Corp. - New Hampshire | Hillsborough | Merrimack, NH | +1-603261-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Hillsborough | Merrimack, NH | +1-603262-SSSS |
| Brooks Fiber Communications Of New Hampshire | Hillsborough | Manchester, NH | +1-603263-SSSS |
| Omnipoint Miami E License | Hillsborough | Manchester, NH | +1-603264-SSSS |
| Omnipoint Miami E License | Hillsborough | New Boston, NH | +1-603265-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Belknap | Tilton, NH | +1-603266-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Belknap | Belmont, NH | +1-603267-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Suncook, NH | +1-603268-SSSS |
| Union Telephone Co. | Grafton | Rumney, NH | +1-603269-SSSS |
| Brooks Fiber Communications Of New Hampshire | Hillsborough | Manchester, NH | +1-603270-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Merrimack | Concord, NH | +1-603271-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Grafton | Woodsville, NH | +1-603272-SSSS |
| Brooks Fiber Communications Of New Hampshire | Belknap | Laconia, NH | +1-603273-SSSS |
| Brooks Fiber Communications Of New Hampshire | Rockingham | East Kingston, NH | +1-603274-SSSS |
| Omnipoint Miami E License | Rockingham | Derry, NH | +1-603275-SSSS |
| Bell Atlantic Nynex Mobile | Grafton | W Lebanon, NH | +1-603276-SSSS |
| Comcast Phone Of New Hampshire | Hanover, NH | +1-603277-SSSS | |
| Bretton Woods Telephone Co. | Coos | Jefferson, NH | +1-603278-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Belknap | Meredith, NH | +1-603279-SSSS |
| Level 3 Communications | Strafford | Barrington, NH | +1-603280-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Hillsborough | Nashua, NH | +1-603281-SSSS |
| Brooks Fiber Communications Of New Hampshire | Grafton | Canaan, NH | +1-603282-SSSS |
| Paetec Communications | Cheshire | Keene, NH | +1-603283-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Carroll | North Sandwich, NH | +1-603284-SSSS |
| Brooks Fiber Communications Of New Hampshire | Strafford | Dover, NH | +1-603285-SSSS |
| No New England Tel Op DBA Fairpoint Comm | Belknap | Tilton, NH | +1-603286-SSSS |
| Level 3 Communications | Sullivan | Claremont, NH | +1-603287-SSSS |
