Prefix 303-502 — Fort Lupton, CO

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

Area code
303
Prefix (NXX)
502
Rate center
Fort Lupton
State
Colorado
Time zone
Mountain
Code holder
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
OCN
6567
Pooled
Yes (thousands-block pooling)
Assigned
2005-12-13
LATA
656

The 303-502 prefix belongs to area code 303 and is anchored to the Fort Lupton rate center (CO). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

For routing purposes it sits in LATA 656. Numbers here keep Mountain time.

The assigned code holder is CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO, operating company number 6567, assigned December 13, 2005. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

Caller ID showing 303-502 is not proof the call came from Fort Lupton: 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

Prefixes adjacent to 303-502
PrefixRate centerCode holder
303-499 Denver QWEST CORPORATION
303-500 Hudson LEVEL 3 COMMUNICATIONS, LLC - CO
303-501 Denver CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
303-503 Denver CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
303-504 Denver QWEST CORPORATION
303-505 Denver T-MOBILE USA, INC.

FAQ

Where is 303-502 located?

The prefix is assigned to the Fort Lupton rate center in CO, area code 303.

Which company owns 303-502 numbers?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.

Is a call from 303-502 safe to answer?

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