Boston, Massachusetts
339 Area Code
Establish a trusted local presence in Boston's suburbs and the Route 128 corridor with a 339 area code number. Perfect for businesses targeting Waltham, Lynn, Medford, Quincy and surrounding communities in Massachusetts' innovation economy.
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About 339 Area Code
Area code 339 serves the Boston suburbs and the iconic Route 128 technology corridor. Introduced on May 2, 2001 as an overlay to area code 781, 339 covers communities including Waltham, Lynn, Medford, Quincy, Lexington and Dedham. The code spans portions of Middlesex, Norfolk, Essex and Plymouth counties, supporting local voice and SMS communications for businesses, healthcare providers, educational institutions and technology companies across this densely populated region.
The 339 area is home to biotech clusters, higher education institutions, Route 128 tech companies and healthcare organizations. Businesses use 339 numbers for patient appointments, customer support, sales calls and university communications. A local number increases answer rates and builds trust because it signals authentic presence in one of America's most educated and innovation-driven regions. This is especially valuable for life sciences, software, financial services and professional service firms targeting local clients.
FoneSwift displays live 339 inventory with Voice, SMS and MMS capabilities on this page. Search available numbers to find the right fit for your operations. Area code availability changes over time. If 339 numbers are limited, nearby codes like 617 (Boston proper), 781 (overlays with 339) or 508 (Worcester area) can provide regional Massachusetts presence while maintaining strong local identity.
If you serve the Greater Boston market, display numbers in both local and international formats (e.g., (339) 555-1234 and +1 339 555 1234) and register A2P messaging if you plan business SMS campaigns. For number porting, review our porting guide. Many businesses preserve their existing 339 numbers to maintain customer recognition and leverage the area's reputation for innovation and quality.
| Country | United States |
| State | Massachusetts |
| Area code | 339 |
| Primary cities | Boston, Lynn, Waltham, Medford, Quincy |
| Counties served | Essex, Middlesex, Norfolk, Plymouth |
| Timezone | America/New York (EST) |
| Created | May 2, 2001 |
| International Format | +1 339 XXX XXXX |
| Local Format | (339) XXX-XXXX |
10-digit dialing is mandatory for all calls in the 339/781 region. Register A2P messaging for business SMS to comply with U.S. carrier rules (10DLC).
Area code 339 uses Eastern Standard Time (EST, UTC-5) and observes Daylight Saving Time, becoming Eastern Daylight Time (EDT, UTC-4) from March through November.
Local 339 numbers deliver higher answer rates and trust for businesses targeting the Boston suburbs and Route 128 corridor. If 339 inventory is limited, overlay code 781 or nearby Boston code 617 can provide equivalent local presence in the Greater Boston market.
Quick Facts about 339 Area Code
Interesting tidbits about this area code 339
Overlay for 781
339 was created as an overlay to area code 781 when the Boston suburbs needed additional numbering capacity to support rapid growth in the technology and life sciences sectors.
Route 128 corridor
339 serves the famous Route 128 technology corridor, once dubbed "America's Technology Highway" and home to pioneering tech companies, now evolving into biotech and lab space.
Ten-digit dialing required
Because 339 overlays 781, ten-digit dialing has been mandatory since 2001, making it one of the earlier regions to require area codes for all local calls.
Biotech hub coverage
The 339 region includes Waltham, Lexington and Needham, where hundreds of life sciences companies operate in office parks that are converting to lab and biomanufacturing facilities.
College town connections
339 serves communities home to Brandeis University, Bentley University, Tufts University and other institutions that fuel the region's educated workforce and startup ecosystem.
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How Does Local 339 Phone Numbers Work?
A local business number is a structured telephone identifier that tells networks where to route calls and messages. When you use a 339 number in Boston and Massachusetts, the digits signal the international gateway, the geographic region, the local exchange and the specific subscriber, so calls reach the right destination quickly and reliably.
The typical parts of a United States local number are:
- Country code (+1): identifies United States for international routing.
- Area code (339): directs the call to the Boston / Massachusetts region.
- Central office / exchange (eg. 555): narrows the call to a local switching area or rate center.
- Subscriber number (eg. 1234): the unique line assigned to a person, extension, or device.
Example formats:
| International Format (E.164) | +1 339 555 1234 |
| Local Format (National) | (339) 555-1234 |
Quick Dialing Guide
The correct formats to reach 339 numbers locally and globally.
From Landlines
Standard United States FormatUse for domestic long-distance calls within United States.
From Mobile
E.164 InternationalThe universal format. Works on any mobile device, anywhere.
International
From abroadDialing from outside United States (exit code 00 varies by country).
With FoneSwift, your 339 number can be instantly configured through our intuitive dashboard. Connect it to call forwarding rules, AI voice agents, IVR menus, or route calls directly to any device. Enable voice, SMS, and MMS capabilities right from your account, no technical setup required. Your number becomes active immediately after purchase, and you can update routing, business hours, and integrations anytime.
For businesses, local numbers offer clear benefits: higher answer rates, stronger local recognition, and better performance for local campaigns and customer trust. Typical business features include call forwarding, call recording, auto-attendants, voicemail-to-email, and multi-device ringing.
Important operational notes:
- SMS & A2P: If you plan to send application-to-person messages from a 339 number, register your traffic where required and follow carrier rules (10DLC/A2P) to avoid deliverability or throughput issues.
- Number Porting: Bring your existing 339number to FoneSwift seamlessly. Our team handles the entire porting process, simply submit your number details and we'll coordinate with your current provider. Porting typically completes within 5-10 business days, and you'll receive updates at each step. There's no service interruption during the transfer.
- Display & formatting: Always publish numbers in both local and E.164 formats so international and mobile users can easily dial.
Ready to get started? Browse available 339 numbers in the phone numbers section above, you'll see real-time availability and can filter by features like voice, SMS, and MMS. Once you find your perfect number, purchase it in seconds and start making calls immediately. Our team is here to help you choose the right setup for your business needs, whether you're setting up AI receptionists, call forwarding, or SMS campaigns. Start your 14-day free trial today, no credit card required.
How to Get a 339 Phone Number
Buying a local 339 phone number using FoneSwift is easy and takes just a few minutes. Follow these simple steps to get your local 339 phone number and start connecting with customers in United States today.
Create a new account on FoneSwift or sign in to your existing account to get started.
Once logged in, you'll be taken to your FoneSwift dashboard where you can manage all your phone numbers and settings.
Click on Settings in the sidebar, then go to "My Numbers" and click the "Add a Number" button.
Choose United States as your country from the dropdown menu.
Select Local as the type of number, then choose the 339 area code from the available options.
Click the "Search" button to see all available phone numbers with the selected area code.
Browse through the available numbers, select one that fits your needs, click "Buy Number", and confirm your purchase.
Your number is now active! Start making and receiving calls from the FoneSwift Dialer immediately.
You can configure your number to handle calls, forward calls, or even create an AI voice agent to handle the calls for you.
Businesses Using 339 Phone Numbers
The Boston suburbs and Route 128 corridor host biotech companies, technology firms, healthcare organizations, universities and professional services. Local phone numbers support customer engagement and regional trust across diverse industries.
Biotechnology & life sciences
Biotech companies, pharmaceutical firms, medical device manufacturers and research labs use local numbers for clinical trial coordination, vendor communications and regulatory affairs in Massachusetts' leading life sciences cluster.
Software & technology companies
SaaS providers, software developers, IT consultancies and tech startups along Route 128 use 339 numbers for sales, support and product demonstrations targeting enterprise and SMB markets.
Healthcare & medical services
Hospitals, physician practices, dental offices and telehealth providers rely on local numbers for appointment scheduling, patient reminders and care coordination across the Boston suburbs.
Higher education & research
Colleges, universities and research institutions use 339 numbers for admissions offices, campus services, alumni relations and research administration serving students and academic partners.
Professional services
Law firms, accounting practices, consulting firms and financial advisors use local numbers to build trust with clients in the affluent Boston suburbs and establish regional credibility.
Real estate & property management
Residential brokers, commercial real estate firms and property managers use 339 numbers for listing inquiries, showing appointments and tenant communications in one of the nation's most active real estate markets.
Why Choose 339 Local Phone Number for Your Business?
Discover the advantages of having a local phone number that builds trust, increases engagement, and drives results.
Powerful Features for Your 339 Local Phone Number
Get the most out of your localphone number with FoneSwift's enterprise-grade features designed to help your business communicate more effectively.
Nearby Area Codes
Explore other area codes in the same region to expand your local presence.
Frequently Asked Questions
What areas does the 339 area code cover?
When was area code 339 introduced?
Can I get Voice and SMS on 339 numbers?
Is ten-digit dialing required for 339 numbers?
What is the difference between 339 and 781?
How do I purchase a 339 area code number?
Can I port my existing 339 number to FoneSwift?
Where can I find official 339 area code information?
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