Get a local business phone number in Martinsburg, WV

Martinsburg area codes

With 19,047 residents in the Census 2024 estimate, Martinsburg sits in Berkeley County, West Virginia. NANPA lists 33 exchanges for its rate center across 2 area codes; 304 has the most (21, 64%). 304 is part of an overlay with 681, so a new local number in Martinsburg may carry any of those codes depending on which have numbers available. Martinsburg is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 304 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Phone carriers in Martinsburg

11 carriers hold the 33 exchanges assigned to Martinsburg's rate center. Frontier West Virginia INC. has the most, with 7. 26 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Martinsburg can come from any of these blocks; once it is yours, porting lets it move between providers.

Exchanges (NPA-NXX) assigned in Martinsburg

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Martinsburg's rate center (MARTINSBG). The earliest assignment date recorded in the file for these codes is 2001. 8 of the 33 were assigned in 2020 or later.

When Martinsburg's exchanges were assigned

Assignment dates show when each block of Martinsburg numbers was added to the local supply.

What makes a number local to Martinsburg

NANPA ties every exchange to a rate center. For Martinsburg that is MARTINSBG, so a number from one of these exchanges reads as local to people in and around Martinsburg.

Keeping an existing Martinsburg number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 304 when you pick it.

Businesses around Martinsburg

Martinsburg is part of the Hagerstown-Martinsburg, MD-WV metro area, home to 311,000 people in 2024. County Business Patterns counted 5,508 business establishments in the Hagerstown, MD-WV metro area in 2023, employing 93,205 people. The largest sectors by establishment count are retail trade (838), health care and social assistance (734), and other services (except public administration) (691).

Business phone service in Martinsburg

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.

If you already have a number in Martinsburg, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

The comparison below uses 17 users, the rounded average establishment size in the Hagerstown, MD-WV metro area. At list prices checked September 28, 2026, that is $424.15 a month on Ooma Office Pro and $510.00 on RingCentral RingEX Core. On Callata the same 17 people cost $339.00 a month, less than either per-seat plan.