Area codes 815 and 779

Area codes 815 and 779 are telephone

overlay

.

History

When the American Telephone and Telegraph Company (AT&T) created the first nationwide telephone numbering plan for Operator Toll Dialing in 1947, the state of Illinois was divided into four numbering plan areas (NPAs). They were generally laid out as a region in and around Chicago, a northern band outside Chicago, and two bands in the central and southern parts of the state. 815 was assigned to the northern band outside Chicago as one of the 86 original North American area codes.

After September 1956,

area code 708.^[2]

In preparation of an

overlay plan with the new area code 779, all calls from the 815 area needed to be dialed with an area code

beginning on February 17, 2009. A month later, area code 779 was activated.

Service area

References

^ Notes on Distance Dialing. American Telephone and Telegraph Company. September 1956. p. Sec II-App A-1.
^ History of area code 309

External links

NANPA area code map of Illinois
Area Code Overlay Approved for 815 Area Code - general information from AT&T, the RBOC for the area code

779/815, 872
	North: 353/608, 262
West: 563	Area codes 779 and 815	East: 708
	South: 217
920
Indiana area codes: 219, 260, 317/463, 574, 765, 812/930
Iowa area codes: 319, 515, 563, 641, 712

40°11′44″N 89°31′00″W / 40.195659°N 89.516602°W / 40.195659; -89.516602

[1] Notes on Distance Dialing. American Telephone and Telegraph Company. September 1956. p. Sec II-App A-1.

[2] History of area code 309

[2]

History

Service area

See also

References

External links