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Dekalb Area Codes

About Dekalb Area Codes

The city of Dekalb, located in Illinois, is served by 2 telephone area code(s) in this dataset. These calling codes connect residential neighborhoods, business districts, and surrounding communities.

Major phone area codes used in Dekalb include 779 and 815. The city falls under the America/Chicago time zone(s), depending on the exact location and provider routing.

List of Area Codes in Dekalb, Illinois

The table below lists all telephone area codes used in Dekalb, Illinois, along with the associated counties and time zones from this dataset.


S.N. Area Code Counties Time Zone(s)
1 779 DeKalb America/Chicago
2 815 DeKalb America/Chicago


ZIP Codes in Dekalb, Illinois

Zip code data is not available for this city in the current dataset.



Related Area Code Pages

Explore related area code resources on Burning Compass:

  • All area codes in Illinois
  • Individual area code details are available from the table above.

Cities in Illinois (Area Codes)

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