Area Code 603 Phone Directory
Phone Numbers that start with (603) XXX-XXXX
Information for Area Code 603
- State: NH
- Largest City: SPRINGFIELD
Where is Area Code 603?
Area code (603) is in the state of NH. Below, are the major cities in the area code (603).Area Codes Starting with 6
- (600) xxx-xxxx
- (601) xxx-xxxx
- (602) xxx-xxxx
- (603) xxx-xxxx
- (604) xxx-xxxx
- (605) xxx-xxxx
- (606) xxx-xxxx
- (607) xxx-xxxx
- (608) xxx-xxxx
- (609) xxx-xxxx
- (610) xxx-xxxx
- (612) xxx-xxxx
- (613) xxx-xxxx
- (614) xxx-xxxx
- (615) xxx-xxxx
- (616) xxx-xxxx
- (617) xxx-xxxx
- (618) xxx-xxxx
- (619) xxx-xxxx
- (620) xxx-xxxx
- (621) xxx-xxxx
- (622) xxx-xxxx
- (623) xxx-xxxx
- (624) xxx-xxxx
- (625) xxx-xxxx
Major Cities in Area Code 603
- Rank:541034
- Manchester, NH
- Rank:371318
- Nashua, NH
- Rank:221118
- Concord, NH
- Rank:187388
- Derry, NH
- Rank:178575
- Dover, NH
- Rank:153545
- Rochester, NH
- Rank:134737
- Portsmouth, NH
- Rank:133043
- Merrimack, NH
- Rank:120465
- Salem, NH
- Rank:118790
- Hudson, NH
- Rank:112380
- Londonderry, NH
- Rank:103239
- Bedford, NH
- Rank:100647
- Laconia, NH
- Rank:99637
- Keene, NH
- Rank:96214
- Hampton, NH
- Rank:85029
- Exeter, NH
- Rank:82917
- Hooksett, NH
- Rank:81625
- Goffstown, NH
- Rank:81110
- Milford, NH
- Rank:76685
- Somersworth, NH
Zip codes in Area Code 603
- 03031
- 03032
- 03033
- 03034
- 03036
- 03037
- 03038
- 03040
- 03041
- 03042
- 03043
- 03044
- 03045
- 03046
- 03047
- 03048
- 03049
- 03051
- 03052
- 03053
- 03054