In the July 1908 edition of Modern Electrics the following was stated:
This Department has been started with the idea to bring the wireless amateur in closer touch with commercial land and ship stations. Each month a list of new members will be printed here and once each year an official BLUE BOOK will be issued by MODERN ELECTRICS, giving a list of all the members who registered during the year. Each member will receive the Official Blue Book free of charge.
The Blue Book will also contain a complete list of commercial and government stations, their call letters, wave length, etc.
To register a station requires: Total length of aerial (from top to spark balls), spark length, call letter (if none is in existence M. E. will appoint one), name and address of owner.
Fee for Registry (including one Blue Book) 50 cents.
Here is the list of operators that first month:1
As you can see one of the first origional operators was Harold E. Peck, Providence, R. I.
From this letter sent to Radio Retailing, 1925, Peck seems to have worked for Blanding and Blanding, Pharmacy at 54 Weybosset Street, Providence, RI. Blanding & Blanding sold radios and parts in the 1920s.