(603) Area Code Business Phone Numbers
Established in 1947, the 603 area code has covered every corner of New Hampshire for nearly 80 years without ever being split or overlaid[1]. A 603 number tells customers in Manchester, Nashua, and beyond that you are genuinely part of the Granite State.
Get a 603 NumberAbout the 603 Area Code
New Hampshire is one of only a handful of states that still runs on a single area code. 603 was one of the original 86 area codes assigned in 1947, and thanks to number pooling and reclaimed blocks, exhaustion has been pushed back to at least 2032[1]. For locals, that three digit prefix carries a lot of weight.
Manchester anchors the state's business scene as the largest city in Northern New England. The Manchester-Nashua corridor added private sector jobs at a 1.1 percent clip last year, more than twice the statewide rate, with healthcare, life sciences, insurance, and aerospace manufacturing leading the way[2]. Add no sales tax and no income tax, and it is easy to see why small businesses keep setting up shop here.
If you want calls from Keene or Portsmouth to feel like calls from a neighbor, a 603 number does that work for you. Granite Staters are known for shopping local, and an out of state caller ID gets ignored or sent to voicemail. Tonet lets you pick a 603 number in a few minutes, no contract required.
Cities Served by the 603 Area Code
Because 603 is statewide, your number works everywhere from the Seacoast to the North Country. Here are the biggest markets you will reach.
Features Built for 603 Businesses
Whether you run a contracting shop in Derry or a law office downtown, these are the tools that pay for themselves fast.
Auto Attendant
Greet callers with a professional menu that routes them to the right person. Great for the solo plumber who sounds like a bigger shop.
Call Recording
Capture quotes, orders, and support calls. Pull them up later when a customer disputes what was promised.
AI Transcription
Every voicemail and recorded call turns into searchable text, so you can skim what happened without replaying audio.
Business SMS
Text appointment reminders and quotes from your 603 number. Customers get a familiar area code, not a random short code.
Mobile App
Take business calls from your personal phone without giving out your personal number. Switch work on and off when you leave the shop.
Daily Billing
Plans start at $10 per user per month billed daily, with numbers at $2.50 each. No contracts, so you only pay for what you actually use.
Frequently Asked Questions
Can I get a 603 number if I am not in New Hampshire?
Yes. Tonet lets you pick any available 603 number regardless of where you live. It is helpful if you serve New Hampshire customers remotely or plan to open a location there.
Will my current calls and texts move over?
If you already have a 603 number, you can port it to Tonet in 7 to 10 business days, sometimes longer depending on your current carrier. Nothing changes for your customers, they keep calling the same number.
Is 603 really the only area code in New Hampshire?
Yes. New Hampshire has used 603 statewide since 1947 with no overlay, so a 603 prefix instantly reads as local anywhere in the state.
How much does a 603 business line cost?
Plans start at $10 per user per month billed daily. Each phone number is $2.50 per month, and there are no annual contracts.
Can multiple employees share one 603 number?
Yes. Ring groups let a single 603 number ring the right team, whether it is sales in Manchester or dispatch in Nashua. Everyone uses the mobile or desktop app.
Ready to sound like a local?
Pick a 603 number, port your old one, or add a second line in under five minutes.
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