Prefix 303-885 — Denver, CO

NANPA CO code assignment, current as of July 28, 2026.

The 303-885 prefix belongs to area code 303 and is anchored to the Denver rate center (CO). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Denver is part of the Denver-Aurora-Centennial, CO Metropolitan Statistical Area. For routing purposes it sits in LATA 656. Numbers here keep Mountain time.

Code-holder of record: NEW CINGULAR WIRELESS PCS, LLC (OCN 6010), assigned April 12, 2001. The prefix is not pooled, so the full 10,000-number block sits with the code holder (subject to number portability).

Caller ID showing 303-885 is not proof the call came from Denver: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

FAQ

Where is 303-885 located?

The prefix is assigned to the Denver rate center in CO, area code 303. It is part of the Denver-Aurora-Centennial, CO Metropolitan Statistical Area.

Which company owns 303-885 numbers?

NEW CINGULAR WIRELESS PCS, LLC holds the code. Individual numbers may still be ported to other providers.

Is a call from 303-885 safe to answer?

The prefix itself says nothing about the caller. Legitimate Denver businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.