Radio Inspection Districts
In late 1912, the Department of Commerce and Labor's Bureau of Navigation divided the United States into nine "Radio Inspection Districts", in order to enforce provisions of the August 13, 1912 "Act to Regulate Radio Communication". Although there were a few minor adjustments, the overall district boundaries remained the same over the years.
Above is a map of the nine U.S. Radio Inspection Districts, adopted from a map which
appeared on page 55 of the July, 1922 issue of Radio News.
(The layout of the districts reflected the early emphasis on radio's use by seagoing vessels.)
The August 15, 1919 edition of Radio Communication
Laws of the United States, included the following sections about the
Radio Inspection Districts:
163. The Department has established, for the purpose of enforcing,
through radio inspectors and others, the acts relating to
radio communication and the International Convention, the following districts,
with the principal office for each district at the customhouse of the
- BOSTON, MASS.: Maine, New Hampshire, Vermont, Massachusetts,
Rhode Island, Connecticut.
- NEW YORK, N. Y.: New York (county of New York,
Staten Island, Long Island, and counties on the Hudson River to and including
Schenectady, Albany, and Rensselaer) and New Jersey (counties of Bergen, Passaic,
Essex, Union, Middlesex, Monmouth, Hudson, and Ocean).
- BALTIMORE, MD.: New Jersey (all counties not
included in second district), Pennsylvania (counties of Philadelphia, Delaware, all counties
south of the Blue Mountains, and Franklin County), Delaware, Maryland, Virginia, District of
- SAVANNAH, GA.: North Carolina, South Carolina, Georgia, Florida, Porto Rico.
- NEW ORLEANS, LA.: Alabama, Mississippi, Louisiana, Texas, Tennessee, Arkansas, Oklahoma, New Mexico.
- SAN FRANCISCO, CALIF.: California, Hawaii, Nevada, Utah, Arizona.
- SEATTLE, WASH.: Oregon, Washington, Alaska, Idaho,
- DETROIT, MICH.: New York (all counties not included in second district), Pennsylvania (all counties not included in third district),
West Virginia, Ohio, Michigan (Lower Peninsula).
- CHICAGO, ILL.: Indiana, Illinois, Wisconsin,
Michigan (Upper Peninsula), Minnesota, Kentucky, Missouri, Kansas, Colorado, Iowa, Nebraska,
South Dakota, North Dakota.
(Until mid-1919 the 8th radio district had been headquartered in Cleveland, Ohio).