Where is the 303 area code?

The 303 area code covers Denver, Colorado (Mountain Time).

Are calls from 303 spam?

Not all 303 calls are spam, but scammers often spoof local 303 numbers ("neighbor spoofing") so a call looks familiar. Look up the specific number to check.

303 area code

Denver, Colorado · Mountain Time

The 303 area code serves Denver, Colorado. Getting a call from 303? It may be a real local caller — but scammers frequently spoof local 303 numbers so the call looks familiar (“neighbor spoofing”), even when they’re nowhere near Denver.

Recently reported 303 numbers

No 303 numbers have been reported here yet. If a 303 number called you, look it up above and add a report to warn others.

Common scams using 303 calls

🏛️ IRS / Tax Scam

"You owe back taxes — pay now or be arrested."

🪪 Social Security Scam

"Your Social Security number has been suspended."

🚗 Auto Warranty Robocall

"Your car's extended warranty is about to expire."

📦 Package / Amazon Scam

"There's a problem with your delivery / Amazon order."

Area-code information reflects where numbers in 303 are normally assigned. Caller ID can be spoofed, so a 303call may not actually originate from Denver, Colorado.