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Oak Brook, IL Area Codes

Oak Brook, Illinois (population 8,108) uses area codes 630, 708, 847 and 331.

Area code630
Area code708
Area code847
Area code331
Time zoneCentral
Local time now…

Oak Brook has no telephone exchange of its own in NANPA records; it is served by the Hinsdale exchange about 4.5 km away.

Oak BrookAuroraNapervilleSchaumburgBolingbrookWheatonDowners GroveElmhurstLombardBartlettOswegoCarol StreamStreamwoodOak Brook
Oak Brook and nearby cities in area code 630

Carriers with Oak Brook numbers

109 prefixes are assigned to the Hinsdale exchange: 41% mobile, 24% VoIP and cable, 35% landline.

CarrierPrefixes
AT&T Mobility43
AT&T (Illinois Bell)33
Lumen (Level 3)9
Verizon Business (MCImetro)7
AT&T (Teleport)7
Paetec Itel2
T-Mobile2
Onvoy (Sinch)2

Area codes used in Oak Brook

Area codePrefixes serving Oak BrookMain carriers in this code
63075AT&T (Illinois Bell), AT&T Mobility, T-Mobile
70816AT&T (Illinois Bell), T-Mobile, AT&T Mobility
84712AT&T (Illinois Bell), AT&T Mobility, Verizon Business (MCImetro)
3316Onvoy (Sinch), T-Mobile, Verizon Wireless

Oak Brook phone number prefixes

Numbers starting with these first six digits were originally assigned to the Hinsdale exchange.

Nearby cities in area code 630

Questions

What is the area code for Oak Brook, IL?
Oak Brook uses 4 area codes: 630, 708, 847 and 331. Different parts of the area are served by different codes.
What time zone is Oak Brook in?
Oak Brook is in the Central time zone.