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Darien, IL Area Codes

Darien, Illinois (population 22,032) uses area codes 630 and 331.

Area code630
Area code331
Time zoneCentral
Local time now…

Darien has no telephone exchange of its own in NANPA records; it is served by the Downers Grove exchange about 6.4 km away.

DarienAuroraNapervilleSchaumburgBolingbrookWheatonDowners GroveElmhurstLombardBartlettOswegoCarol StreamStreamwoodDarien
Darien and nearby cities in area code 630

Carriers with Darien numbers

77 prefixes are assigned to the Downers Grove exchange: 19% mobile, 35% VoIP and cable, 45% landline.

CarrierPrefixes
AT&T (Illinois Bell)29
Verizon Wireless12
Verizon Business (MCImetro)7
AT&T (Teleport)7
Onvoy (Sinch)5
Lumen (Level 3)4
AT&T Mobility3
Paetec Itel2

Area codes used in Darien

Area codePrefixes serving DarienMain carriers in this code
63056AT&T (Illinois Bell), AT&T Mobility, T-Mobile
33121Onvoy (Sinch), T-Mobile, Verizon Wireless

Darien phone number prefixes

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

Nearby cities in area code 630

Questions

What is the area code for Darien, IL?
Darien uses 2 area codes: 630 and 331. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Darien in?
Darien is in the Central time zone.