Area code 603 is assigned for use in New Hampshire since Jan 01, 1947. View all phone prefixes used in area code 603 or other area codes in New Hampshire. Included with the location of each prefix are the phone companies / service providers that operates them.
| Area code / prefix | Location | Company / Service Provider |
|---|---|---|
| 603-200 | NEWMARKET, NH | COMCAST IP PHONE, LLC |
| 603-202 | CONCORD, NH | OMNIPOINT MIAMI E LICENSE, LLC |
| 603-203 | MANCHESTER, NH | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 603-204 | NASHUA, NH | UNITED STATES CELLULAR - NH |
| 603-205 | PORTSMOUTH, NH | OMNIPOINT MIAMI E LICENSE, LLC |
| 603-206 | MANCHESTER, NH | PAETEC COMMUNICATIONS, INC. - NH |
| 603-207 | DERRY, NH | ONVOY, LLC - NH |
| 603-208 | LYME, NH | UNITED STATES CELLULAR - NH |
| 603-209 | KEENE, NH | UNITED STATES CELLULAR - NH |
| 603-210 | SUNCOOK, NH | COMCAST IP PHONE, LLC |
| 603-212 | SALEM, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-213 | MILFORD, NH | COMCAST IP PHONE, LLC |
| 603-214 | ERROL, NH | FREEDOM RING COMMUNICATIONS, LLC |
| 603-215 | BERLIN, NH | FREEDOM RING COMMUNICATIONS, LLC |
| 603-216 | DERRY, NH | COMCAST IP PHONE, LLC |
| 603-217 | BRISTOL, NH | BELL ATLANTIC MOBILE, INC |
| 603-218 | MANCHESTER, NH | BROADVIEW NETWORKS, INC. - NH |
| 603-219 | CONCORD, NH | OMNIPOINT MIAMI E LICENSE, LLC |
| 603-221 | NASHUA, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-222 | MANCHESTER, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-223 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-224 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-225 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-226 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-227 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-228 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-229 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-230 | CONCORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-231 | DERRY, NH | OMNIPOINT MIAMI E LICENSE, LLC |
| 603-232 | MANCHESTER, NH | COMCAST IP PHONE, LLC |
| 603-233 | NASHUA, NH | OMNIPOINT MIAMI E LICENSE, LLC |
| 603-234 | DERRY, NH | OMNIPOINT MIAMI E LICENSE, LLC |
| 603-235 | DERRY, NH | OMNIPOINT MIAMI E LICENSE, LLC |
| 603-236 | CAMPTON, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-237 | COLEBROOK, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-238 | PLYMOUTH, NH | PAETEC COMMUNICATIONS, INC. - NH |
| 603-239 | WINCHESTER, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-240 | MANCHESTER, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-241 | DOVER, NH | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 603-242 | TROY, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-243 | WOODSVILLE, NH | CHARTER FIBERLINK NH-CCO-LLC - NH |
| 603-244 | RAYMOND, NH | COMCAST IP PHONE, LLC |
| 603-245 | PORTSMOUTH, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-246 | WSTEWATSTN, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-247 | DERRY, NH | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 603-248 | DOVER, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-249 | MILFORD, NH | CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
| 603-250 | CENTER HBR, NH | FREEDOM RING COMMUNICATIONS, LLC |
| 603-251 | Charlestown, NH | PAETEC COMMUNICATIONS, INC. - NH |
| 603-252 | W LEBANON, NH | UNITED STATES CELLULAR - NH |
| 603 Area Code Information | ||
|---|---|---|
| Type of code: | General Purpose Code | |
| Location: | NH - US | |
| Time zone: | E | |
| Assigned for use: | Yes | |
| Code in service: | Yes | |
| Service date: | 01/01/47 | |
| In jeopardy: | No | |
| Relief in progress: | No | |
| NPA Relief status: | ||
| Code assignable: | Yes | |
| Geographic or non-geographic: |
G | |
| Reserved for future use: | No | |
| Planning letter(s): | 556 544 163 | |
| Overlay code: | No | |
| Overlay complex: | ||
| Dialing plan | Standard | Permissive |
| Home local calls: | 10D | 1+10D |
| Foreign local calls: | 1+10D | NA |
| Home toll calls: | 10D | 1+10D |
| Foreign toll calls: | 1+10D | - |
1+10 digit permissible at service provider discretion.