phone book, or the business directory.

Area Code 331

Located in the Central (GMT -06:00) time zone. Area code 331 serves the state of Illinois. This area code was assigned on July 23rd, 1999. On October 7th, 2007 it went into service. 331 is a General Purpose Code. 331 service area does overlap with 630 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Information for Area Code 331

Area Code
331
Country
United States
State
Illinois (IL)
Major City
Aurora
Time Zone
Central (GMT -06:00)

List of Cities in Area Code Overlay Complex 270

  • Aurora
  • West Chicago
  • Naperville
  • Downers Grove
  • Lombard
  • Saint Charles
  • Elmhurst
  • Roselle
  • Montgomery
  • Sugar Grove
  • Warrenville
  • Oswego
  • Geneva
  • Dupage
  • Kane
  • Wheaton
  • Lemont
  • Plano
  • Hanover Park
  • Yorkville
  • Elburn
  • Big Rock
  • Bensenville

List of Zip Codes in Area Code 331

  • 60133
  • 60103
  • 60516
  • 60515
  • 60517
  • 60126
  • 60506
  • 60505
  • 60538
  • 60563
  • 60540
  • 60565
  • 60560
  • 60175
  • 60174
  • 60134
  • 60543
  • 60187
  • 60189
  • 60554
  • 60185
  • 60555
  • 60440
  • 60439
  • 60491
  • 60106
  • 60119
  • 60148
  • 60511
  • 60512
  • 60172
  • 60151
  • 60545

SPs and Telephone companies in Area Code 270

  • T-mobile Usa, Inc.
  • New Cingular Wireless Pcs, Llc - Il
  • Cellco Partnership Dba Verizon Wireless - Il
  • Sprint Spectrum L.p.
  • Bandwidth.com Clec, Llc - Il
  • Sigecom, Llc Dba Wow Internet Cable And Phone
  • Xo Illinois, Inc.
  • First Communications Llc - Il
  • Level 3 Communications, Llc - Il
  • Mci Worldcom Communications, Inc. - Il
  • Neutral Tandem-illinois, Llc - Il
  • Peerless Network Of Illinois, Llc - Il
  • At&t Corp.
  • Comcast Phone Of Illinois, Llc Dba Comco - Il
  • New Cingular Wireless Pcs, Llc - IL
  • Mci Worldcom Communications, Inc. - IL
  • Teleport Communications America, Llc - IL
  • Neutral Tandem-Illinois, Llc
  • Digital Network Access Communications, Inc. - Il
  • Broadvox-clec, Llc - Il
  • Teleport Communications America, Llc - Il
  • Telnyx Llc
  • Ameritech Illinois
  • Ovation Communications Of Illinois, Inc.
  • Local Access Llc - Il
  • Cibolo Creek Ventures, Llc Dba Routepoint Comm Il
  • Neutral Tandem-illinois, Llc

Phone Numbers Beginning With 331