The 484 area code covers the same area as 610, including Philadelphia suburbs, Allentown and 63 more places in Pennsylvania.
Area code 484 is in Pennsylvania, on Eastern Time. In the 484 area, phone numbers are given out most in Berks County, then Lehigh and Chester counties. It has been in service since June 5, 1999. 610 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
- June 5, 1999
- Shares its area with
- 610 (since 1994) and 835 (since 2022)
- Prefixes in use
- 786
- How to dial
- Local calls need all 10 digits: 484-555-0142.
Find out who called you from a 484 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 (484) number is on today, use our free carrier lookup.
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Philadelphia suburbs holds 33% of the phone prefixes in area code 484.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 786 prefixes in use shows where 484 numbers are actually given out.
- Philadelphia suburbs256 prefixes, 33%
- Allentown82 prefixes, 10%
- Reading51 prefixes, 6%
- West Chester36 prefixes, 5%
- Bethlehem30 prefixes, 4%
- Pottstown20 prefixes, 3%
- Easton15 prefixes, 2%
- Collegeville13 prefixes, 2%
Also served: Collegeville, Catasauqua, Phoenixville and Centerport and 53 smaller places.
PAETEC (Windstream) holds the most phone number prefixes in area code 484: 152 of 786.
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 786 prefixes in use in 484 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| PAETEC (Windstream)Windstream's business phone network | 152 | 19% |
| Level 3 (Lumen)Lumen's business and wholesale network | 128 | 16% |
| T-MobileMobile network | 62 | 8% |
| AT&T MobilityMobile network | 53 | 7% |
| Core Communications | 29 | 4% |
| RCN Telecom Services of Pennsylvania | 26 | 3% |
| 33 other carriers | 336 | 43% |
92% 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.
484 has been overlaid once since 1999.
1999
484 starts on June 5, 1999, as an overlay on 610: new numbers on the same ground.
2022
On September 2, 2022, 835 is added on top of 484, so new numbers here can get either code.
A 484 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 484 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 484.
Where is area code 484?
484 covers Philadelphia suburbs, Allentown, Reading and Bethlehem and 61 more places in Pennsylvania. In the 484 area, phone numbers are given out most in Berks County, then Lehigh and Chester counties.
What state is area code 484 in?
Pennsylvania. 484 is a Pennsylvania area code on Eastern Time.
What cities use area code 484?
The places holding the most 484 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 484?
No single phone company owns 484. NANPA's records show PAETEC (Windstream) holds the most 484 prefixes, 152 of 786, followed by Level 3 (Lumen) and T-Mobile. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 484 in?
484 is on Eastern Time.
When did area code 484 start?
484 went into service on June 5, 1999, as an overlay on 610: new numbers for the same area.
Is 484 the same area as 610 and 835?
Yes. 610 (since 1994) and 835 (since 2022) cover the same ground as 484. 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 484 number?
Local calls need all 10 digits: 484-555-0142.
Is 484 a toll-free number?
No. 484 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 484?
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 484 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 484 a scam?
484 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.