The largest city in the Lehigh Valley and third-largest in Pennsylvania, Allentown has transformed from an industrial center into a growing regional hub anchored by a revitalized downtown. It shares its area codes with the wider southeastern part of the state. This guide breaks down Allentown’s 610, 484, and 835 codes, the required 10-digit dialing, major ZIP codes, and local scam warnings.
Allentown Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code(s) | 610 / 484 |
| Overlay Area Code(s) | 835 |
| Time Zone | Eastern Time (ET) – EST / EDT |
| Major County | Lehigh County |
| Dialing Format | 10-digit dialing required |
Area Code Breakdown & District Mapping
610 – Southeastern PA Code
Area code 610 was created in 1994 when it split from 215, serving southeastern Pennsylvania including the Lehigh Valley, Reading, and the Philadelphia suburbs. It is Allentown’s primary code.
484 – Southeastern PA Overlay
Area code 484 is the 1999 overlay for the 610 region, sharing the same southeastern-Pennsylvania geography. Many newer Allentown lines carry a 484 prefix.
835 – Newest Southeastern PA Overlay
Area code 835 is the newest overlay for the 610/484 region, adding numbering capacity across the Lehigh Valley and southeastern PA. An 835 number is fully local to existing 610 and 484 lines.
Neighborhoods & Local Coverage
Allentown’s 610/484/835 codes cover a city centered on a revitalized downtown, where the PPL Center arena has spurred a wave of restaurants and development along Hamilton Street. The historic districts of Old Allentown and Old Fairgrounds showcase the city’s Victorian architecture just north of the center.
Beyond downtown, the same codes reach Allentown’s leafy West End, the residential East Side and South Side, and neighboring Lehigh Valley communities like Bethlehem, Emmaus, and Whitehall. Because 610 also spans Reading and the Philadelphia suburbs, the codes tie Allentown into the broad southeastern-Pennsylvania corridor.
Local Dialing Rules & International Format
Allentown and the entire 610 region have required 10-digit dialing since the 484 overlay launched — always dial the area code plus the 7-digit number. Neighboring cities to the northeast, like Scranton, use 570/272.
To call Allentown from outside the United States, dial your country’s exit code, then the U.S. country code +1, followed by the 10-digit number (for example, +1 610 XXX-XXXX). From inside the U.S. and Canada, simply dial 1 before the 10-digit number for long-distance calls.
Major ZIP Codes Covered
The 610 / 484 service area spans many of Allentown’s core ZIP codes, including 18101, 18102, 18103, 18104, and 18109.
Spam & Scam Call Warnings in Allentown
Allentown residents report spoofed 610 robocalls impersonating utilities like PPL, along with fake package-delivery and auto-warranty calls. Bilingual scam calls also target the city’s large Latino population.
| Scam Type | What to Watch For |
|---|---|
| Neighbor Spoofing | Calls that mimic a local 610 prefix to look familiar. |
| Utility / Toll Scams | Threats to shut off power or demand toll payment via gift cards. |
| IRS / Government | Robocalls claiming legal action — agencies never call to demand instant payment. |
Red flag: Any caller who pressures you to pay immediately with gift cards, wire transfers, or cryptocurrency is almost certainly running a scam. Hang up and verify through an official number.
↑ See the complete list of All US Area Codes by State for every code across the country.
Nearby & Related Pennsylvania Cities
Frequently Asked Questions
What area code is Allentown, PA?
Allentown uses area code 610 with overlays 484 and 835, shared across southeastern Pennsylvania.
Does Allentown have the same area code as Bethlehem?
Yes. Allentown and Bethlehem both use 610/484/835 in the Lehigh Valley.
Do I need to dial 10 digits in Allentown?
Yes. With the 484 and 835 overlays active, all local calls in the 610 region require 10-digit dialing.
What time zone is Allentown in?
Allentown is in the Eastern Time Zone (EST/EDT), like all of Pennsylvania.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.