Scam Calls from Area Code 331

Debt-reduction solicitations dominate area code 331, an Illinois geographic code centered on the Chicago metro and suburban communities including Aurora, Tinley Park, West Chicago, and Island Lake. That category alone accounts for 94 of the categorized complaints, nearly double the next-highest bucket. Impersonation calls pretending to be government agencies, businesses, or family members follow at 58 complaints, and 54 complaints involve dropped calls or no message left — a pattern often associated with robocall probing to confirm active lines. Medical and prescription calls add 21 complaints, with warranties and protection plans contributing 7.

The 621 total complaints spread across 237 distinct numbers suggests a moderately diffuse operation rather than a single concentrated source, though a handful of numbers stand out. 331-425-7528 leads with 17 complaints and 331-425-7516 follows closely at 15, and neither carries a categorized complaint type in the data. 331-244-3971 has 9 complaints and 331-272-6702 has 8, both similarly uncategorized. That pattern of high-volume numbers without a clear subject label can indicate callers cycling through scripts or rotating pitches to avoid complaint clustering.

Among the categorized top numbers, 331-272-6608 generated 7 complaints specifically tied to debt reduction, and 331-320-2287 produced 7 complaints linked to dropped calls or no message. 331-702-6804 and 331-240-4599 each drew 7 complaints without a recorded category. Activity under this code has been running since February 2026 and remains ongoing as of June 2026.

Geographically, while 331 is assigned to Illinois, complaints trace back to callers or recipients in California and Texas as well, indicating the code is being used in operations that extend well beyond the Chicago suburbs. At rank 261 out of 358 area codes overall, the raw volume is not extreme, but among Illinois-area codes specifically it ranks 31st out of 44 — placing it in the middle tier regionally. The concentration of debt-reduction and impersonation volume, combined with several high-complaint numbers that resist easy categorization, points to an active and adaptable set of calling campaigns with no sign of tapering off.