Telephone Area 603. Page 9.
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.
In the United States, telephone numbers are divided into a country code (+1), an area code (or prefix), which is three digits long, and a subscriber number (seven digits). These are just a few examples, and there are over 300 area codes in the United States. Each code can cover both large cities and less populated areas depending on population density and telephone network distribution.
Phone numbers +1-603-YYY-YYYY
| Company | District | Major City | Prefix |
|---|---|---|---|
| No New England Tel Op DBA Fairpoint Comm | Grafton | Woodsville, NH | +1-603989-SSSS |
| Bell Atlantic Nynex Mobile | Grafton | Littleton, NH | +1-603991-SSSS |
| Level 3 Communications | Grafton | Grafton, NH | +1-603992-SSSS |
| Freedom Ring Communications | Strafford | Rochester, NH | +1-603994-SSSS |
| Sprint Spectrum L.p. | Merrimack | Henniker, NH | +1-603995-SSSS |
| Sprint Spectrum L.p. | Grafton | Plymouth, NH | +1-603996-SSSS |
| Sprint Spectrum L.p. | Rockingham | Hampton, NH | +1-603997-SSSS |
| Sprint Spectrum L.p. | Belknap | Laconia, NH | +1-603998-SSSS |
