Get a local business phone number in Charlestown, NH

What area code is Charlestown, NH?

With 4,919 residents in the Census 2024 estimate, Charlestown sits in Sullivan County, New Hampshire. All 2 exchanges NANPA lists for its rate center are in area code 603. Charlestown is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 603 are dialed as ten digits (area code plus number) and toll calls as ten digits (area code plus number).

Phone carriers in Charlestown

2 carriers hold the 2 exchanges assigned to Charlestown's rate center. Paetec Itel, LLC has the most, with 1. 2 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Charlestown can come from any of these blocks; once it is yours, porting lets it move between providers.

Local prefixes for Charlestown

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Charlestown's rate center (CHARLESTN). The earliest assignment date recorded in the file for these codes is 2012. None were assigned in 2020 or later.

Rate centers and local calling in Charlestown

What a caller sees as "local" is the area code plus prefix. In Charlestown, those come from the CHARLESTN rate center, as recorded by NANPA.

If your business already has a Charlestown number, porting it to Callata is free and keeps it on your cards, listings and vehicles.

Businesses around Charlestown

Charlestown is part of the Lebanon-Claremont, NH-VT micropolitan area, home to 225,000 people in 2024. County Business Patterns counted 6,513 business establishments in the Lebanon, NH-VT micropolitan area in 2023, employing 91,598 people. The largest sectors by establishment count are retail trade (966), construction (909), and accommodation and food services (735).

Setting up a Charlestown business line

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

Porting a number you already use in Charlestown is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

The comparison below uses 14 users, the rounded average establishment size in the Lebanon, NH-VT micropolitan area. At list prices checked September 28, 2026, that is $349.30 a month on Ooma Office Pro and $420.00 on RingCentral RingEX Core. Callata comes to $279.00 a month for 14 users ($99 a month with 5 users included, then $20 per additional user), below both.