Area code
Area code 603 — Manchester, NH
New Hampshire · in service since 1947
Area code 603 covers all of New Hampshire. No other area code overlays it.
Local time in Manchester
Spam reports from Sep 23 – Oct 22, 2026
Average #237 of 461 codes
375 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneEastern Time
- Local calls10 digits
- Prefixes768 assigned
- Runs out~4Q 2040
- Unwanted call?Block & report
Spam call reports about 603 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 17 |
| Sep 14 | 98 |
| Sep 21 | 87 |
| Sep 28 | 90 |
| Oct 5 | 69 |
| Oct 12 | 90 |
| Oct 19 (4 days) | 69 |
Compared with all codes
- Robocalls
- 61%all codes 75%
- Callers with the same code
- 60%all codes 35%
- Rank by complaints
- #237of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 858 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Dropped call or no message | 42 8% | |
| Reducing your debt (credit cards, mortgage, student loans) | 37 7% | |
| Calls pretending to be government, businesses, or family and friends | 36 7% | |
| Medical & prescriptions | 25 5% | |
| Vacation & timeshares | 11 2% | |
| Home improvement & cleaning | 8 2% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| New Hampshire | 302 58% | |
| Florida | 23 4% | |
| Oregon | 22 4% | |
| California | 21 4% | |
| Massachusetts | 21 4% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 603 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| MANCHESTER | Manchester | Hillsborough County | 80 |
| NASHUA | Nashua | Hillsborough County | 58 |
| CONCORD | Concord | Merrimack County | 39 |
| DERRY | Derry | Rockingham County | 29 |
| DOVER | Dover | Strafford County | 29 |
| PORTSMOUTH | Portsmouth | Rockingham County | 28 |
| MERRIMACK | — | — | 23 |
| SALEM | — | — | 20 |
| LACONIA | Laconia | Belknap County | 19 |
| KEENE | Keene | Cheshire County | 17 |
Plus 137 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- New Hampshire
- Assigned by NANPA
- 1947
- Local dialing
- 10 digits (NANPA: 10D)
- NANPA planning letters
- PL-556, PL-544, PL-163
Source: NANPA, NPA database of Oct 24, 2026.
Is 603 running out of numbers?
Previous forecast (October 2025): 2037, moved later by 3 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 603 prefixes
The five largest of 50 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Consolidated Comm Of No. New England-Nh | 247 32% | |
| Bell Atlantic Mobile, Inc. | 74 10% | |
| Paetec Itel, LLC | 58 8% | |
| Mcimetro Access Transmission Services LLC | 45 6% | |
| Comcast IP Phone, LLC | 40 5% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 603
What area code is 603?
A New Hampshire area code, in service since 1947.
Where is 603 area code, and what time zone is it in?
Manchester, NH; Eastern Time.
Why am I getting spam calls from 603?
375 FTC complaints from Sep 23 – Oct 22, 2026, most often about dropped calls or no message (not verified by the FTC; caller ID can be spoofed).
Will 603 get a new area code?
NANPA forecasts exhaust in 4Q 2040; no relief planning listed.