Illinois Phone Prefixes in 331-3XX Area Code

Phone Prefixes in the 331-3XX Area Code

Prefix Usage Primary City
(331) 305 Wireless Naperville
(331) 303 Landline Elburn
(331) 318 Landline Lemont
(331) 333 Wireless Naperville
Prefix Usage Primary City
(331) 332 Wireless Naperville
(331) 302 Wireless Aurora
(331) 301 Landline Aurora
(331) 330 Landline Oswego

More 3XX Area Codes Phone Numbers