City of Monticello


Directory area code and prefix available at City of Monticello

Directory Numbers

In the United States and Canada, telephone numbers are typically 10 digits long and are structured as follows:

  • (Area Code) + (Prefix) + (Line Number)
  • Area Code:

    This is a three-digit number that represents a specific geographic region. Some area codes cover entire states or provinces, while others cover smaller regions, particularly in more densely populated areas.

    Prefix (Central Office Code):

    The prefix, or central office code, is the three-digit number that comes after the area code. It narrows down the location further and can sometimes identify a specific town or city, though mobile phone prefixes are not tied to specific geographic regions anymore.

  • County: Piatt 217-762
  • County: Jones 319-465
  • County: San Juan 435-587
  • County: Lewis 573-767
  • County: White 574-583
  • County: Lawrence 601-615
  • County: Lawrence 601-587
  • County: Wayne 606-396
  • County: Wayne 606-343
  • County: Wayne 606-340
  • County: Wayne 606-348
  • County: Green 608-938
  • County: Jasper 678-456
  • County: Jasper 706-468
  • County: Wright 763-271
  • County: Wright 763-272
  • County: Wright 763-265
  • County: Wright 763-295
  • County: Wright 763-314
  • County: Wright 763-878
  • County: Jasper 770-765
  • County: Sullivan 845-796
  • County: Sullivan 845-791
  • County: Sullivan 845-794
  • County: Jefferson 850-342
  • County: Jefferson 850-997
  • County: Drew 870-460
  • County: Drew 870-367