How many area codes does New Hampshire have?

New Hampshire has 1 active geographic area code in the North American Numbering Plan: 603. Each code serves a distinct region or acts as an overlay for a high-demand metro area.

What is the oldest area code in New Hampshire?

The oldest area code in New Hampshire is 603, assigned in 1947. It serves Manchester and the New Hampshire (statewide) region. 603 is one of the original 86 area codes created when the North American Numbering Plan was first established.

Can I get a New Hampshire phone number from anywhere?

Yes. DialPhone virtual phone numbers are not tied to a physical location. You can get a New Hampshire area code number and use it from any device — desktop, mobile, or browser — anywhere with an internet connection. This makes New Hampshire numbers ideal for remote teams, distributed businesses, and sales teams targeting New Hampshire customers.

How much does a New Hampshire area code number cost?

DialPhone plans start at $24 per user per month on the Core plan. Every plan includes your choice of New Hampshire area code number, unlimited US and Canada calling, business SMS, AI call captions, and a free 14-day trial — no credit card required. See the DialPhone pricing page for current tier details.

Can I port my existing New Hampshire number to DialPhone?

Yes. DialPhone supports free number porting from any major US or Canadian carrier, including existing New Hampshire area code numbers. Porting typically completes in 2 to 5 business days with zero service interruption. See the complete number porting guide for step-by-step instructions.

What time zones are used in New Hampshire?

New Hampshire area codes span the ET time zone. When scheduling calls with New Hampshire customers, verify the specific area code's time zone to avoid calling outside business hours.

Area Codes in New Hampshire — Local Business Phone Numbers

Quick answer

New Hampshire has 1 active geographic area code covering Manchester. The most-recognized code is 603, serving Manchester and the New Hampshire (statewide) region.

Total codes: 1
Top metro: Manchester
Time zone: ET
Largest code: 603 (Manchester)

By Darshan M

Growth Operations Lead at DialPhone · Verified against NANPA data

Area codes in New Hampshire

New Hampshire is served by 1 active geographic area code in the North American Numbering Plan. The 603 area code covers the entire New Hampshire (statewide) region.

Code	Primary City	Region	Established	Overlay Codes	Population
603	Manchester	New Hampshire (statewide)	1947	—	1,400,000

Time zones in New Hampshire

All area codes in New Hampshire fall in the ET time zone.

ET — area code: 603

Top metros and their area codes

Below are the primary cities in New Hampshire and the area codes that serve each metro. Cities with multiple codes share geography due to overlay assignments added as demand grew.

Manchester — 603

Why get a local New Hampshire number?

A New Hampshire area code number gives your business three core advantages:

Local trust signal. Customers in New Hampshire recognize local area codes as their own. A familiar caller ID builds immediate credibility for service businesses, sales teams, and patient communication.
Higher answer rate. Calls from a local area code are answered far more often than toll-free or out-of-area numbers — industry data puts the lift at 20–40%. That difference matters most for outbound sales, appointment confirmations, and service callbacks.
Targeted marketing. Advertising a local New Hampshire number on print, radio, digital, and outdoor channels converts better than a national 800 number for audiences who prefer doing business locally.

How to get a New Hampshire area code number with DialPhone

Setting up a New Hampshire business number takes under 10 minutes:

Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
Search available New Hampshire numbers. Filter the DialPhone number inventory by state, area code, city, or number pattern.
Choose your number and configure. Assign your new New Hampshire number to a user or team, configure call routing, voicemail, AI receptionist, and business SMS.
Port your existing number (optional). Already have a New Hampshire number? Free number porting completes in 2 to 5 business days with zero service interruption.