The 610 area code covers Philadelphia suburbs, Allentown and 63 more places in Pennsylvania.
Area code 610 is in Pennsylvania, on Eastern Time. In the 610 area, phone numbers are given out most in Berks County, then Lehigh and Chester counties. It has been in service since January 8, 1994. 484 and 835 cover the same area, so two neighbours can have different area codes.
- Where
- 8 counties in Pennsylvania, mostly Berks County, Lehigh County and Chester County
- Time zone
- Eastern Time
- In service since
- January 8, 1994
- Shares its area with
- 484 (since 1999) and 835 (since 2022)
- Prefixes in use
- 782
- How to dial
- Local calls need all 10 digits: 610-555-0142.
Find out who called you from a 610 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (610) number is on today, use our free carrier lookup.
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Philadelphia suburbs holds 46% of the phone prefixes in area code 610.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 782 prefixes in use shows where 610 numbers are actually given out.
- Philadelphia suburbs359 prefixes, 46%
- Allentown71 prefixes, 9%
- Reading58 prefixes, 7%
- Bethlehem32 prefixes, 4%
- West Chester23 prefixes, 3%
- Easton14 prefixes, 2%
- Pottstown13 prefixes, 2%
- Exton10 prefixes, 1%
Also served: Collegeville, Catasauqua, Phoenixville and Centerport and 53 smaller places.
Of the carriers named here, AT&T Mobility holds the most phone number prefixes in area code 610: 56 of 782.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 782 prefixes in use in 610 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| AT&T MobilityMobile network | 56 | 7% |
| Teleport (AT&T)AT&T's business phone network | 38 | 5% |
| Level 3 (Lumen)Lumen's business and wholesale network | 36 | 5% |
| T-MobileMobile network | 29 | 4% |
| Service Electric Telephone | 21 | 3% |
| PAETEC (Windstream)Windstream's business phone network | 20 | 3% |
| 31 other carriers | 582 | 74% |
55% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
610 has been overlaid once since 1994.
1994
610 starts on January 8, 1994, split off from 215.
1999
On June 5, 1999, 484 is added on top of 610, so new numbers here can get either code.
A 610 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 610 are 215, 908 and 856.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
These are the questions people ask most about area code 610.
Where is area code 610?
610 covers Philadelphia suburbs, Allentown, Reading and Bethlehem and 61 more places in Pennsylvania. In the 610 area, phone numbers are given out most in Berks County, then Lehigh and Chester counties.
What state is area code 610 in?
Pennsylvania. 610 is a Pennsylvania area code on Eastern Time.
What cities use area code 610?
The places holding the most 610 prefixes are Philadelphia suburbs, Allentown, Reading, Bethlehem, West Chester, Easton, Pottstown and Exton, out of 65 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 610?
No single phone company owns 610. NANPA's records list its 782 prefixes across many carriers, and the ones named on this page include AT&T Mobility, Teleport (AT&T) and Level 3 (Lumen). Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 610 in?
610 is on Eastern Time.
When did area code 610 start?
610 went into service on January 8, 1994, when it was split off from 215.
Is 610 the same area as 484 and 835?
Yes. 484 (since 1999) and 835 (since 2022) cover the same ground as 610. Nobody's number changed when they were added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 610 number?
Local calls need all 10 digits: 610-555-0142.
Is 610 a toll-free number?
No. 610 is a regular area code for Philadelphia suburbs and Allentown in Pennsylvania, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 610?
The closest are 215/267/445 (Philadelphia, Pennsylvania), 908 (Elizabeth, New Jersey), 856 (Camden, New Jersey) and 609/640 (Atlantic City, New Jersey), measured between the centres of each area.
Who called me from a 610 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 610 a scam?
610 is a real Pennsylvania area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.