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Get a local business phone number in Poolesville, MD

Poolesville's area codes, prefixes and carriers from NANPA records, and how to put a Poolesville number in front of your customers.

Area code
240 / 301
Exchanges
8NANPA-assigned
Carriers
7
Population
5,856Census 2024 est.

Poolesville area codes

Poolesville, in Montgomery County, Maryland, had a Census-estimated population of 5,856 in July 2024. NANPA lists 8 exchanges for its rate center across 2 area codes; 240 has the most (6, 75%). 240 is part of an overlay with 227 and 301, so a new local number in Poolesville may carry any of those codes depending on which have numbers available. Poolesville is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 240 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Area codes with exchanges in Poolesville, MD
Area codeExchanges hereShareIn service sinceOverlay withTime zone
240675%1997227, 301Eastern
301225%1947240, 227Eastern

Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.

Who holds Poolesville phone exchanges

7 carriers hold the 8 exchanges assigned to Poolesville's rate center. Peerless Network of Maryland, LLC has the most, with 2. 8 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Poolesville can come from any of these blocks; once it is yours, porting lets it move between providers.

Carriers holding exchanges in Poolesville, MD
Carrier (NANPA operating company)ExchangesShare
Peerless Network of Maryland, LLC225%
Mcimetro Access Transmission Services LLC113%
Onvoy, LLC - MD113%
Level 3 Communications, LLC - MD113%
Cellco Partnership d/b/a Verizon Wireless - MD113%
Verizon Maryland, INC.113%
Teleport Communications America, LLC - DC113%

Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.

Poolesville phone prefixes

These are the central office codes NANPA records for Poolesville. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 1 of the 8 were assigned in 2020 or later.

Prefixes assigned in Poolesville, MD
Area codePrefixes (NXX)
240220, 255, 489, 771, 812, 961
301349, 691

Source: NANPA utilized central office code file.

When Poolesville's exchanges were assigned

The table groups Poolesville's exchanges by the decade NANPA recorded them as assigned.

Poolesville, MD: exchanges by decade assigned
Decade assignedExchangesShare
2000s133%
2010s133%
2020s133%

Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.

What makes a number local to Poolesville

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

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

The local business market

Poolesville is part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metro area, home to 6.4 million people in 2024. County Business Patterns counted 159,002 business establishments in the Washington, DC-VA-MD-WV metro area in 2023, employing 2,863,486 people. The largest sectors by establishment count are professional, scientific, and technical services (34,327), health care and social assistance (19,078), and other services (except public administration) (18,064).

Selected industries in the Washington, DC-VA-MD-WV metro area, 2023
IndustryEstablishmentsEmployeesEmployees per establishment
Limited-service restaurants5,57996,39917.3
Full-service restaurants4,821112,60423.4
Management consulting firms4,757106,07322.3
Custom computer programming services firms4,72785,08018.0
Computer systems design services firms4,544104,22422.9
Physician practices3,85146,94212.2
Law offices3,50846,30813.2
Dental offices3,29022,8767.0

Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.

A Poolesville number on Callata

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

Porting a number you already use in Poolesville 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 18 users, the rounded average establishment size in the Washington, DC-VA-MD-WV metro area. At list prices checked September 28, 2026, that is $449.10 a month on Ooma Office Pro and $540.00 on RingCentral RingEX Core. Callata comes to $359.00 a month for 18 users ($99 a month with 5 users included, then $20 per additional user), below both.

Monthly list price for an 18-person team
Provider (plan)Pricing basisPer monthPer year
Callata (Callata Office)$99 incl. 5 users, $20 per extra user$359.00$4,308.00
Quo (Starter)$19.00 per user$342.00$4,104.00
Nextiva (Core)$23.00 per user$414.00$4,968.00
Ooma (Office Pro)$24.95 per user$449.10$5,389.20
Dialpad (Standard)$27.00 per user$486.00$5,832.00
RingCentral (RingEX Core)$30.00 per user$540.00$6,480.00

Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.

Frequently asked questions

What area code is Poolesville, MD?

Poolesville has exchanges in 240 and 301; 240 has the most.

How many phone companies have exchanges in Poolesville?

7, holding 8 exchanges between them, according to NANPA's 10/01/2026 file.

Can I keep my existing Poolesville business number?

Yes. Porting an existing number to Callata is free. Texting from it starts after carrier registration (10DLC), a one-time $49 fee.

How much is a business phone line in Poolesville?

Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 18 users come to $359.00 a month. For comparison, 18 users on RingCentral RingEX Core list at $540.00 a month (checked September 28, 2026).