Allentown, Bethlehem, Reading, and Pottstown share the 835 area code, covering Lehigh, Berks, Delaware, Chester, and Northampton counties plus part of Montgomery County in southeastern Pennsylvania. It went into service on September 2, 2022 — not as a replacement for anything, but as a third area code layered onto territory that already had two: the original 610 and its first overlay, 484, added back in 1999.
This guide covers 835's counties and cities, the three-layer overlay stack that makes this one of the more numerically complex regions in this guide series, what's driving demand across the Lehigh Valley, which of the three codes to pick for a new line, and how dialing works here.
Counties and cities at a glance
| City | County | Region |
|---|---|---|
| Allentown | Lehigh | Lehigh Valley core |
| Bethlehem | Northampton | Lehigh Valley east |
| Reading | Berks | Western edge |
| Pottstown | Montgomery | Southern edge |
| Chester | Delaware | Philadelphia suburbs |
| Ardmore | Delaware | Main Line |
Three codes, one unbroken territory
Most overlays in this guide series involve just two codes sharing one region. Southeastern Pennsylvania has three:
610 — the original code covering this stretch of the Philadelphia suburbs and Lehigh Valley.
484 — added as an overlay in 1999, the first time this territory needed extra numbers. Mandatory ten-digit dialing began here at that point — over two decades before 835 existed.
835 — added as a second overlay on September 2, 2022, once the combined 610/484 pool ran low. All three codes now serve the exact same footprint, and existing numbers in any of them stayed unchanged.
What's driving demand across the Lehigh Valley
The Lehigh Valley and surrounding counties combine East Coast logistics with healthcare and manufacturing:
Logistics and distribution The Lehigh Valley is one of the largest East Coast distribution hubs, with warehouses serving the New York and Philadelphia metro areas.
Healthcare systems Allentown and Bethlehem host large regional hospital networks that keep adding staff and scheduling lines.
Manufacturing Reading and Pottstown retain a manufacturing base that continues to open new commercial lines.
Many of these Lehigh Valley businesses are moving their phone systems onto UCaaS (Unified Communications as a Service) — one cloud platform for calling, video, and messaging that scales as a company adds warehouses or offices across the region, the same pattern behind newer overlays like 814 in northwestern Pennsylvania. Contact us to set up an 835, 484, or 610 number for your Pennsylvania business.
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Which of the three codes should you choose?
All three — 610, 484, and 835 — cover identical territory at identical rates, so the choice comes down to availability and preference. Longtime local businesses often still favor 610 for its name recognition, while newer lines are increasingly assigned 835 simply because it's the newest and least depleted of the three prefixes.
Number availability after the second overlay
Having already drawn down two rounds of numbering (610, then 484), the region's supply was tight enough by the early 2020s to justify a second overlay rather than a geographic split. The 835 overlay reset that pressure, and the combined three-code pool now has considerably more room than 610/484 alone had left.
Time zone & how to dial an 835 number
The Lehigh Valley runs on Eastern Time (ET) — EST (UTC −5) in winter, EDT (UTC −4) during Daylight Saving Time. Ten-digit dialing has been mandatory here since the 484 overlay in 1999, well before 835 existed: dial 1, then the area code, then the seven-digit number, for every local call.
Key takeaways
- 835 covers the Lehigh Valley and surrounding counties in southeastern Pennsylvania, in service since September 2, 2022.
- It's a third code layered onto the same territory as 610 and 484, not a split.
- All three codes serve identical territory at identical rates.
- Anchors include Lehigh Valley logistics, regional healthcare systems, and manufacturing.
- Time zone: Eastern (ET), with 10-digit dialing mandatory since 1999.
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Frequently asked questions
What is the 835 area code?
It covers the Lehigh Valley and nearby counties in southeastern Pennsylvania, and has been active since September 2022.
Where is the 835 area code located?
Lehigh, Berks, Delaware, Chester, and Northampton counties plus part of Montgomery County, in southeastern Pennsylvania.
Is 835 a Florida area code?
No. It has never been assigned to Florida — this is strictly a Pennsylvania code.
What state is the 835 area code in?
Pennsylvania — specifically the Lehigh Valley and Philadelphia's western suburbs.
What time zone is the 835 area code?
Eastern Time Zone (ET) — EST (UTC −5) in winter and EDT (UTC −4) during Daylight Saving Time.
Why does this region have three area codes — 610, 484, and 835?
610 was the original code; 484 was added as an overlay in 1999, and 835 was added as a second overlay in 2022 once the first two codes' numbers ran low.
How do I get an 835 area code number?
Sign up with a VoIP provider such as My Country Mobile, search for available numbers in any of the three codes, choose a Lehigh Valley prefix, select a plan, and activate.
