Area Code 484

About Area Code 484

Area code 484 is a geographic telephone area code assigned to Allentown, Pennsylvania. It operates in the Eastern time zone and was first introduced in 1999. Overlay for 610. Eastern Pennsylvania.

Within Pennsylvania, area code 484 shares numbering capacity with 12 other area codes. The state's 12,964,056-person population (2023 Census Bureau estimate) is served by a combined 13 active codes, with 484 primarily responsible for the Allentown region. Pennsylvania's state capital is Harrisburg, and its largest city is Philadelphia.

When you receive a call from a 484 number on your Caller ID, the call originated from a phone number assigned to the 484 area code — but be aware that Local Number Portability (in effect since 2003) means the caller could be physically located anywhere in the US or Canada. Area code 484 only confirms where the number was originally assigned.

Where is the 484 area code located?

Area code 484 is assigned to Allentown, Pennsylvania, in the Eastern time zone. The state of Pennsylvania uses 13 active area codes, and 484 is one of them. Calls placed from the 484 area code originate from numbers assigned by NANPA — the North American Numbering Plan Administrator — and the 484 prefix appears on Caller ID for both landline and wireless calls placed from this region.

The Eastern time zone observes Daylight Saving Time, shifting from UTC-5 to UTC-4 in summer. The local time shown above is always current, so you can quickly check whether it's a reasonable hour to call back.

What cities and counties use the 484 area code?

The 484 area code serves 9 notable cities, listed below in order of population. The largest city in the 484 territory is Allentown (125,845 residents in Lehigh County).

• Allentown, PA — 125,845 residents (5.1% of 484 numbers)
• Philadelphia, PA — 1,567,442 residents (64.1% of 484 numbers)
• Pittsburgh, PA — 302,971 residents (12.4% of 484 numbers)
• Erie, PA — 93,928 residents (3.8% of 484 numbers)
• Reading, PA — 95,112 residents (3.9% of 484 numbers)
• Scranton, PA — 75,799 residents (3.1% of 484 numbers)
• Bethlehem, PA — 76,568 residents (3.1% of 484 numbers)
• Lancaster, PA — 58,039 residents (2.4% of 484 numbers)
• Harrisburg, PA — 50,118 residents (2% of 484 numbers)

Phone number format in area code 484

All phone numbers within area code 484 follow the standard North American 10-digit format:(484) NXX-XXXX. The NXX is the central office prefix (also called an "exchange") and XXXX is the subscriber line number. For long-distance calls within the NANP, dial 1 + 484 + NXX + XXXX. From outside North America, dial your country's international access code, then 1 (the NANP country code), then the 10-digit number.

If you need to verify whether a specific 484 number is wireless, landline, or VoIP, you can use our reverse phone lookup tool. Be aware that number portability means the area code no longer guarantees the caller's physical location — only where the number was first assigned.

History of area code 484

Overlay for 610. Eastern Pennsylvania.

The original 86 area codes were assigned by AT&T and Bell Labs in 1947 as part of the North American Numbering Plan. At the time, rotary-dial phones meant codes with lower digits (like 212 for NYC, 213 for LA, 312 for Chicago) were given to the largest cities because they took less time to dial. Today's area code assignments still reflect those early choices, even though touch-tone and cell phones made the original reason obsolete.

Is the 484 area code safe to answer?

Area code 484 itself is a normal geographic code with no elevated spam risk. That said, scammers can spoof any area code — including 484 — so if you don't recognize the full number, let it go to voicemail and verify the caller's identity before calling back.