Scam Calls from Area Code 303

Area code 303, covering Denver and its Colorado Front Range suburbs including Littleton, Longmont, Aurora, and Broomfield, has generated 1,706 complaints across 635 numbers since February 2026, with activity still ongoing as of June 2026. Among the 44 Colorado-assigned area codes, it ranks 11th by complaint volume, a mid-tier but meaningful load concentrated in a geographically tight metro corridor.

The single largest complaint category is dropped calls or no message, with 201 complaints, suggesting a high rate of robocall probing where no live interaction ever occurs. Impersonation calls pretending to be government, businesses, or family and friends follow closely at 168 complaints, and medical and prescription solicitations account for 134 more. Debt-reduction pitches targeting credit cards, mortgages, and student loans add another 121 complaints, while home improvement and cleaning solicitations contribute 31.

The busiest individual number, 303-209-1177, has drawn 26 complaints in the medical and prescriptions category. Three numbers with 25 complaints each round out the top tier: 303-468-4065 and 303-393-5084 each carry 25 complaints, and 303-309-1163 sits at 24 complaints in the dropped-call category. Further down, 303-226-9260 at 18 complaints, 303-476-4385 at 17, 303-744-2448 at 13, and 303-827-7106 at 12 complaints in the dropped-call category fill out a roster where several high-volume numbers have not been categorized at all.

FCC records exist for 25 numbers, with prerecorded-message delivery slightly edging out live calls, 189 to 178, against only 5 abandoned-call records. That near-even split between robocall and live-agent operations points to a dual-track campaign structure rather than a single automated blasting operation.

The combination of active medical-solicitation numbers, a substantial impersonation complaint load, and a large block of high-complaint numbers that have not yet been classified suggests the 303 cluster is still being mapped by complaint reporters. The uncharacterized numbers, several carrying 13 to 25 complaints each, represent the murkiest part of this picture and likely include scam types whose patterns have not yet resolved clearly enough to categorize, making the overall threat profile broader than the labeled categories alone convey.