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About Illinois Area Code 331

The 331 area code includes Illinois cities Aurora, Bartlett, Batavia, Downers Grove, Elmhurst, Geneva, Glen Ellyn, Hinsdale, Itasca, Lemont, Lisle, Lombard, Naperville, Plano, Roselle, West Chicago, Yorkville.

Nearby area codes are 224, 312, 630, 708, 773, 779, 815 and 847.
Search for a phone number:
Example: 331-555-5555

331 Area Code Exchanges 100-153:

331-100-xxxx    331-101-xxxx    331-102-xxxx    331-103-xxxx    331-104-xxxx    331-105-xxxx    331-106-xxxx    331-107-xxxx    331-108-xxxx    331-109-xxxx    331-110-xxxx    331-111-xxxx    331-112-xxxx    331-113-xxxx    331-114-xxxx    331-115-xxxx    331-116-xxxx    331-117-xxxx    331-118-xxxx    331-119-xxxx    331-120-xxxx    331-121-xxxx    331-122-xxxx    331-123-xxxx    331-124-xxxx    331-125-xxxx    331-126-xxxx    331-127-xxxx    331-128-xxxx    331-129-xxxx    331-130-xxxx    331-131-xxxx    331-132-xxxx    331-133-xxxx    331-134-xxxx    331-135-xxxx    331-136-xxxx    331-137-xxxx    331-138-xxxx    331-139-xxxx    331-140-xxxx    331-141-xxxx    331-142-xxxx    331-143-xxxx    331-144-xxxx    331-145-xxxx    331-146-xxxx    331-147-xxxx    331-148-xxxx    331-149-xxxx    331-150-xxxx    331-151-xxxx    331-152-xxxx    331-153-xxxx    
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