LOG IN / SIGN UP

DeKalb County Area Codes

About DeKalb County Area Codes

The county of DeKalb County, located in Illinois, is served by 2 telephone area code(s) in this dataset. These calling codes cover cities, suburbs, and unincorporated communities across the county.

Major phone area codes used in DeKalb County include 779, 815. The county mainly follows the America/Chicago time zone.

Cities and towns served by these area codes in DeKalb County include Dekalb.

List of Area Codes in DeKalb County, Illinois

The table below lists all telephone area codes used in DeKalb County, Illinois, along with their associated cities and time zones from this dataset.


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


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.

County Area Codes in Illinois

  1. Adams County Area Codes
  2. Boone County Area Codes
  3. Champaign County Area Codes
  4. Coles County Area Codes
  5. Cook County Area Codes
  6. DeKalb County Area Codes
  7. DuPage County Area Codes
  8. Jackson County Area Codes
  9. Kane County Area Codes
  10. Kankakee County Area Codes
  11. Knox County Area Codes
  12. Lake County Area Codes
  13. Macon County Area Codes
  14. Madison County Area Codes
  15. McHenry County Area Codes
  16. McLean County Area Codes
  17. Peoria County Area Codes
  18. Rock Island County Area Codes
  19. Sangamon County Area Codes
  20. St. Clair County Area Codes
  21. Stephenson County Area Codes
  22. Tazewell County Area Codes
  23. Vermilion County Area Codes
  24. Will County Area Codes
  25. Winnebago County Area Codes

US State Area Codes

  1. Alabama Area Codes
  2. Alaska Area Codes
  3. Arizona Area Codes
  4. Arkansas Area Codes
  5. California Area Codes
  6. Colorado Area Codes
  7. Connecticut Area Codes
  8. Delaware Area Codes
  9. District of Columbia Area Codes
  10. Florida Area Codes
  11. Georgia Area Codes
  12. Hawaii Area Codes
  13. Idaho Area Codes
  14. Illinois Area Codes
  15. Indiana Area Codes
  16. Iowa Area Codes
  17. Kansas Area Codes
  18. Kentucky Area Codes
  19. Louisiana Area Codes
  20. Maine Area Codes
  21. Maryland Area Codes
  22. Massachusetts Area Codes
  23. Michigan Area Codes
  24. Minnesota Area Codes
  25. Mississippi Area Codes
  26. Missouri Area Codes
  27. Montana Area Codes
  28. Nebraska Area Codes
  29. Nevada Area Codes
  30. New Hampshire Area Codes
  31. New Jersey Area Codes
  32. New Mexico Area Codes
  33. New York Area Codes
  34. North Carolina Area Codes
  35. North Dakota Area Codes
  36. Ohio Area Codes
  37. Oklahoma Area Codes
  38. Oregon Area Codes
  39. Pennsylvania Area Codes
  40. Rhode Island Area Codes
  41. South Carolina Area Codes
  42. South Dakota Area Codes
  43. Tennessee Area Codes
  44. Texas Area Codes
  45. Utah Area Codes
  46. Vermont Area Codes
  47. Virginia Area Codes
  48. Washington Area Codes
  49. West Virginia Area Codes
  50. Wisconsin Area Codes
  51. Wyoming Area Codes