The 610 area code serves the Philadelphia suburbs, Lehigh Valley, and Berks County in southeastern Pennsylvania. Created in 1994 in a split from Philadelphia’s 215 code, it is now overlaid by area codes 484 and 835. If a 610 number has appeared on your caller ID, this guide explains where it comes from, how to dial it, and how to stay safe from spoofed calls.
Quick Summary: Area Code 610 at a Glance
| Detail | Information |
|---|---|
| Area Code | 610 |
| State | Pennsylvania (PA) |
| Major Cities | Allentown, Reading, Bethlehem, Chester |
| Time Zone | Eastern Time (ET) |
| Country Code | +1 (USA) |
| Overlay Codes | 484, 835 (co-located) |
Geographic Coverage & Major Cities
Area code 610 wraps around the western and southern suburbs of Philadelphia and extends north into the Lehigh Valley. It covers Delaware, Chester, Berks, Lehigh, and Northampton counties along with parts of Montgomery and Schuylkill.
- Allentown & Bethlehem – the Lehigh Valley’s largest cities
- Reading – the seat of Berks County
- Chester & West Chester – Delaware and Chester county hubs
- Easton, Norristown & Pottstown – established suburban communities
From the industrial Lehigh Valley to the leafy Main Line suburbs, a 610 number is closely tied to the identity of southeastern Pennsylvania outside the city.
A Brief History of Area Code 610
Area code 610 was created in 1994 in a split from the 215 code, taking the suburbs and the Lehigh Valley as the Philadelphia region grew. The 484 overlay was added in 1999, and a further overlay, 835, was assigned to the same region as a relief code. The area uses mandatory 10-digit dialing.
Time Zone & Best Time to Call
Numbers in the 610 area code use Eastern Time (ET). The region observes Daylight Saving Time, shifting from EST (UTC-5) to EDT (UTC-4) between March and November each year.
How to Dial Phone Numbers in Area Code 610
Because 610 shares its region under an overlay, the area requires 10-digit dialing on every call.
Calling within the United States or Canada
- 10-digit dialing: Include the area code – 610-XXX-XXXX.
- 11-digit dialing: You can also dial 1-610-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 610 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 610 XXX XXXX
- From any mobile phone worldwide: +1 610 XXX XXXX
Is Area Code 610 a Scam? Safety & Protection Tips
Area code 610 is a legitimate Pennsylvania area code – a call from it is not fraudulent by default. However, scammers frequently spoof local codes like 610, faking the caller ID so their number appears to come from a trusted local line. Neighbor spoofing, which mimics the first six digits of your own number, is especially common.
Common scam tactics linked to this region
| Scam type | What to watch for |
|---|---|
| Government impersonation | Callers posing as the IRS or SSA threatening arrest or fines |
| Bank & card fraud alerts | Claims of suspicious activity seeking your account details |
| Utility shut-off threats | Fake PECO or PPL Electric disconnection demands |
| Package delivery scams | Fake texts or calls about a failed delivery with a bad link |
How to report, block, and look up 610 callers
- Never share personal or financial details with an unexpected caller, however urgent they sound.
- Block the number using your phone’s built-in call-blocking feature or a reputable call-screening app.
- Look up the number with a trusted reverse phone lookup before returning any call.
- Report it to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby & Related Area Codes in Pennsylvania
Area code 610 shares and borders several other Pennsylvania codes:
- 484 – an overlay that shares the southeastern PA region with 610 (see our 484 area code guide)
- 835 – a further overlay assigned to the 610/484 region (see our 835 area code guide)
- 215, 267 & 445 – the city of Philadelphia to the east (see our 215 area code guide)
- 717 & 223 – south-central Pennsylvania (Lancaster and Harrisburg) to the west (see our 717 area code guide)
Explore more codes across the state on our Pennsylvania area codes hub, or browse every prefix in our US area codes directory.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Pennsylvania:
- New York – area code 212
- New Jersey – area code 201
- Delaware – area code 302
- Maryland – area code 410
- West Virginia – area code 304
- Ohio – area code 216
Frequently Asked Questions About Area Code 610
Where is the 610 area code located?
Area code 610 covers the Philadelphia suburbs, Lehigh Valley, and Berks County, including Allentown, Reading, Bethlehem, and Chester. It operates on Eastern Time and is overlaid by 484 and 835.
What is the difference between 610, 484, and 835?
There is no geographic difference. 484 and 835 are overlays covering the same southeastern-PA territory as 610; they were added to supply more phone numbers.
Is 610 a landline or cell phone area code?
Both. Area code 610 serves landlines, mobile phones, and VoIP numbers throughout southeastern Pennsylvania.
Should I answer a call from an unknown 610 number?
If you are not expecting the call, let it go to voicemail. Legitimate callers leave a message, while spoofed or robocall numbers usually will not. Verify any unfamiliar number with a reverse lookup before calling back.
Related 610 Guides
- Is a 610 call safe? Read Is area code 610 a scam? Spam & safety guide.
- Local coverage: see the Allentown area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.