484 area code — Allentown, PA geographic
- State
- Pennsylvania
- Major area
- Allentown
- Time zone
- Eastern
- In service since
- 1999-06-05
- Split from
- 610
- Active prefixes
- 786
- Rate centers
- 79
- Carriers
- 42
- Projected exhaust
- 3Q 2050
Phone numbers beginning 484 are registered to the Allentown area of Pennsylvania (Eastern time zone). The code entered service on June 5, 1999. Together with 610, 835 it forms the 484/610/835 overlay. Because of number portability and VoIP, the area code tells you where the number was issued, not where the caller is right now.
NANPA lists 786 active NXX prefixes in 484, assigned to 42 carriers. 722 of those prefixes are pooled — shared between carriers in thousands-number blocks. The code spans 79 rate centers (billing localities).
If a 484 call asks for money or personal data, treat the displayed number as unverified: hang up and reach the organization through its published number. Numbering data locates numbers, not callers.
Its parent code is 610, which it left in 1999. Later relief produced 835 (2022) from its territory.
Official projections put exhaust for the 484/610/835 complex at 3Q 2050.
The dialing plan is 10D for home-NPA local calls and 1+10D across codes.
Largest localities in 484
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Allentown | 82 | 610, 835 |
| Reading | 51 | 610, 835 |
| Philadelphia Suburban Zone 30 | 44 | 610, 835 |
| West Chester | 36 | 610, 835 |
| Bethlehem | 30 | 610, 835 |
| Philadelphia Suburban Zone 28 | 25 | 610 |
| Philadelphia Suburban Zone 10 | 21 | 610, 835 |
| Pottstown | 20 | 610, 835 |
| Philadelphia Suburban Zone 31 | 18 | 610 |
| Philadelphia Suburban Zone 26 | 17 | 610 |
FAQ
Why am I getting spam calls from 484 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 484 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 484 number from?
484 is assigned to Allentown and surrounding areas of Pennsylvania in the Eastern time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 484 a toll-free number?
No. 484 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why do 610 and 484 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 484/610/835 complex shares one service area, and local calls are dialed with 10 digits.
Will 484 run out of numbers?
NANPA's current forecast projects exhaust in 3Q 2050 — decades of capacity remain.