Discovering the truth about a phone number, email, or address history can be eye-opening, please use this tool with caution.USA Area code 484 - King of Prussia, PA
Area code 484 is a North American Numbering Plan telephone area code serving Telephone area codes in Pennsylvania, United States in Pennsylvania. It was activated in 1994 and today covers roughly 553,906 residents across 69 cities and towns, primarily in Delaware County .
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Who called me from area code 484?
A call from area code 484 most likely originates from King of Prussia or elsewhere in Pennsylvania - but caller ID spoofing means the area code alone cannot confirm who called. Right now, 25 484 numbers carry scam reports on this page. The only reliable way to identify the caller is to check the full 10-digit number:
- Run the number through the reverse phone lookup at the top of this page to see the owner's name, carrier, and location.
- Compare it against the recently reported scam numbers in 484 below.
- If the call was unwanted, report it to the FTC and use the report form on this page so other 484 residents see it.
Report a scam call from 484 Help other 484-area residents - takes 20 seconds, no signup
Reports are reviewed by our team before appearing on the page. The highest-reported numbers get added to the “Recently reported scam numbers” list above with a “community” badge.
Should I answer a call from a 484 number? Take the 30-second quiz - 5 questions, verdict + advice
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Next step: run a reverse-phone lookup on the number to see everything public about it.
Where is the 484 area code? Coverage map
The pin marks King of Prussia, the largest city served by area code 484. Zoom and pan to explore the coverage region.
Interactive map. Click a pin for city details. Data © OpenStreetMap contributors.
Cities in the 484 area code
Area code 484 serves the following 69 communities across 1 county:
Area codes near 484 (overlay + neighboring)
If a caller ID shows one of these codes, the call is probably still from the King of Prussia area or a nearby region. Click any code to see its own page.
484 area code robocall complaints (FCC data)
Monthly count of FCC complaints tagged to numbers in area code 484 over the last 12 months.
163 complaints in the last 12 months. That's about 102% more robocall complaints per capita than the US average - 29 per 100,000 residents vs a national average of 14.6.
Source: FCC Consumer Complaint Data (dataset vakf-fz8e). Data as of August 6, 2026. Refreshed monthly.
How 484 area code spam calls arrive
Based on 163 FCC complaints in the last 12 months, here's how 484 spam calls reached recipients:
FCC Consumer Complaint Data, last 12 months as of August 6, 2026. Refreshed monthly. Note: the FCC dataset labels method (Live Voice / Prerecorded / SMS) but does not classify scam type (IRS impersonation, tech support fraud, etc.) - those come from community reports.
Recently reported scam numbers in 484
Numbers reported to the FCC or by our community in the last 12 months. Click any to run a full reverse-phone lookup.
Source: FCC Consumer Complaint Data, last 12 months as of August 6, 2026. Refreshed monthly. Numbers submitted via the report form near the top of this page get added here with a “community” badge after moderation.
How to block 484 spam calls (by carrier)
Getting repeated spam calls from 484 numbers around King of Prussia, Pennsylvania? You can't legitimately block every 484 call without also missing legitimate ones from King of Prussia, Pennsylvania - so the practical fix is to turn on your carrier's free spam filter and register on the national do-not-call list. Step-by-step for each major US carrier below.
AT&T
- Download the free AT&T ActiveArmor app (iOS + Android).
- Sign in with your wireless number.
- Enable Fraud Blocking and Suspected Spam Warning.
- To block a specific number, tap the call in your history → Block.
Verizon
- Download the free Verizon Call Filter app (iOS + Android).
- Sign in with your Verizon account.
- Turn on Spam Filter.
- To block a specific number: My Verizon → Blocks → Add Number.
T-Mobile
- Download the free Scam Shield app (iOS + Android).
- Enable Scam Block (blocks known scam calls silently).
- Use Scam ID to see “Scam Likely” caller ID on suspicious numbers.
- To block a specific number, dial
#662#from your device.
All carriers
- Register on the FTC's National Do-Not-Call list.
- Report unwanted calls to the FCC at fcc.gov/complaints.
- On iPhone: Settings → Phone → Silence Unknown Callers.
- On Android: Phone app → ⋮ → Settings → Caller ID & spam.
Sources: carrier support pages (AT&T, Verizon, T-Mobile), FCC consumer guides. Free features as of 2026. Every one of these steps costs nothing.
History of the 484 area code
Area codes 610, 484, and 835 are telephone overlay area codes in the North American Numbering Plan (NANP) for the eastern and southeastern regions of Pennsylvania. The numbering plan area (NPA) includes regions to the west of Philadelphia and the cities Allentown, Bethlehem, and Reading. It includes much of the Philadelphia metropolitan area, including almost all of Delaware County, most of the Philadelphia Main Line, and all of the Lehigh Valley.
484 area code FAQ: common questions
What area code is 484?
Area code 484 is a North American Numbering Plan area code that serves Telephone area codes in Pennsylvania, United States in Pennsylvania, primarily including King of Prussia and surrounding communities. It was activated in 1994.
Where does area code 484 cover?
Area code 484 covers Delaware County, including cities such as Berks County, Hereford, Pennsburg, Bucks County, Coopersburg, and roughly 64 other communities.
Is 484 a real area code or a scam?
484 is a real, actively-assigned US area code - not itself a scam. However, spammers do use 484 numbers because the code is well-known and appears local to millions of residents. Always verify the specific number, not the area code.
How do I block 484 spam calls?
You cannot legitimately block an entire area code without also blocking legitimate calls from King of Prussia. Better options: register on the National Do-Not-Call list, enable your carrier's spam-filter (all major US carriers now offer this free), and report unwanted calls to the FCC at fcc.gov/complaints so they show up in the trend data on this page.
Sources
Or explore reverse-phone lookup for any US number.