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Get a local business phone number in Hampstead, MD

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

Area code
443 / 667 / 410
Exchanges
9NANPA-assigned
Carriers
7
Population
6,288Census 2024 est.

Hampstead area codes

With 6,288 residents in the Census 2024 estimate, Hampstead sits in Carroll County, Maryland. NANPA lists 9 exchanges for its rate center across 3 area codes; 443 has the most (5, 56%). 443 is part of an overlay with 410 and 667, so a new local number in Hampstead may carry any of those codes depending on which have numbers available. Hampstead is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 443 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Area codes with exchanges in Hampstead, MD
Area codeExchanges hereShareIn service sinceOverlay withTime zone
443556%1997410, 667Eastern
667333%2012410, 443Eastern
410111%1991443, 667Eastern

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

Hampstead exchanges by carrier

7 carriers hold the 9 exchanges assigned to Hampstead's rate center. Paetec Itel, LLC has the most, with 2. 9 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.

Carriers holding exchanges in Hampstead, MD
Carrier (NANPA operating company)ExchangesShare
Paetec Itel, LLC222%
Onvoy, LLC - MD222%
Verizon Maryland, INC.111%
Level 3 Communications, LLC - MD111%
Metropcs, INC.111%
Teleport Communications America, LLC - MD111%
Core Communications, Inc.- MD111%

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.

Hampstead phone prefixes

These are the central office codes NANPA records for Hampstead. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2018. 2 of the 9 were assigned in 2020 or later.

Prefixes assigned in Hampstead, MD
Area codePrefixes (NXX)
410374
443291, 375, 507, 508, 639
667366, 477, 489

Source: NANPA utilized central office code file.

When Hampstead's exchanges were assigned

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

Hampstead, MD: exchanges by decade assigned
Decade assignedExchangesShare
2010s133%
2020s267%

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

What makes a number local to Hampstead

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

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

Businesses around Hampstead

Hampstead is part of the Baltimore-Columbia-Towson, MD metro area, home to 2.9 million people in 2024. County Business Patterns counted 68,827 business establishments in the Baltimore, MD metro area in 2023, employing 1,220,618 people. The largest sectors by establishment count are professional, scientific, and technical services (10,516), health care and social assistance (9,016), and retail trade (8,034).

Selected industries in the Baltimore, MD metro area, 2023
IndustryEstablishmentsEmployeesEmployees per establishment
Limited-service restaurants2,68841,79315.5
Full-service restaurants1,79147,02526.3
Physician practices1,63424,35114.9
Residential remodelers1,4835,6853.8
Law offices1,40310,0797.2
Offices of real estate agents and brokers1,1302,9642.6
Computer systems design services firms1,10518,32416.6
Dental offices1,1028,5597.8

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

A Hampstead number on Callata

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

If you already have a number in Hampstead, 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.

An 18-person team is the benchmark here, the rounded average establishment size in the Baltimore, MD metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $540.00 a month and Ooma Office Pro $449.10. On Callata the same 18 people cost $359.00 a month, less than either per-seat plan.

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 Hampstead, MD?

Hampstead has exchanges in 443, 667, and 410; 443 has the most.

How many phone companies have exchanges in Hampstead?

7, holding 9 exchanges between them, according to NANPA's 10/01/2026 file.

Can I keep my existing Hampstead 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 Hampstead?

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).