The REC Radio History Project

The REC Radio History Project

Click Here for a list of stations with full History Card data loaded

REC's Broadcast Query Tool ( uses a raw data feed from the Federal Communications Commission's Consolidated Data Base System (CDBS) as well as other systems.  CDBS was deployed at the FCC in 1999 as a replacement to the former Broadcast Application Processing System (BAPS).  BAPS was deployed in 1978.  Prior to BAPS, all broadcast license records were typed on 3 x 5 index cards and kept in a card catalog.  These cards maintained a basic history of the station including every application that was placed and their outcome.  When the FCC moved their offices to the Portals in 1999, the 3 x 5 cards were transferred to microfilm and eventually destroyed.  The FCC has made the History Cards accessible to the general public.  

CDBS is a modern system that contained a lot of new functionality and much more flexibility.  During the CDBS era, electronic filing and the ability for broadcasters and potential broadcasters to interface directly with the CDBS system was possible.  CDBS has also maintained a comprehensive database of both current station engineering and legal information as well as non-current (archive) data.  When the FCC performed the conversion from BAPS to CDBS, only "current" data as of 1999 was carried over.  There was no detailed archived data (facility data that no longer applied due to subsequent application activity).  The BAPS to CDBS conversion moved over basic information about a broadcast application but it did not include the engineering details if the record was not "current" at the time of conversion.

This made CDBS a fantastic source for tracing a station's history back to 1999 but data from prior to 1999 was incomplete and history data prior to 1978 was almost non-existent. (Although many AM stations are still running on their facilities authorized during the History Card era.)

The REC Radio History Project comprises of several initatives with the overall goal of placing into REC's Broadcast Query Tool ( as much historical engineering related information to give the full picture of the history of a broadcast facility from the beginning of radio.  This has been made more of a reality with the recent availability of scanned data from the FCC's pre-1980 broadcast history cards.  That data goes back as early as 1927 when the Federal Radio Commission was created.  Additional data sources bring us back to KDKA, WRR, WJZ, WBZ and the other pioneer stations circa 1921.

History Card Preservation Project

The REC Radio History Project records all applications that involve technical changes to the facility as well as legal changes such as transfers and assignments as well as call sign and frequency history.  We have also been including some of the more interesting requests for Special Temporary Authority such as KFI's request to carry communication from Amelia Earhart as she flies from Hawaii to Los Angeles.  Some items such as renewals and information about auxiliiary facilities are not recorded.  We also note that the BAPS did not hold much information on transfers and assignments.  For example, our enhanced record for KHJ shows when General Tire (RKO General) owned the station but then it jumps to the Liberman sale to IHR.  We will be working on future enhancements to to try to reconstruct these ownership transfers. 

This is a time-available project as it is very time consuming.  It can take anywhere from a half hour to over 3 hours per station based on when it was started.  For example a 1920s era station may take up to 4 times as long compared to a 1950s era station, especially if the station started as a daytime only station. 

It is also important to note that while broadcast applicants were required to put the geographic coordinates on their applications, this information was rarely carried over to the History Cards (this practice did not start until the mid-70s).  Instead, a description of the location for the transmitter was given.  Sometimes, these were street address. However, sometimes there were only street names or even less descriptive (3.5 miles SE of Podunk).  Also, applications could be filed without a site specified and the grant would be contingent on finding an authorized site.  Therefore, the coordinates used in REC History Card data is our best estimate especially since street names have changed over the years.  We will do our best to note that a location is approximate on the first record we use the location in question. 

This project also includes the manual archiving of Assign License/Transfer Control (ALTC) applications filed during the BAPS era so that they show up in the "From/To" fielded format similar to how displays CDBS ALTC records. The assignment (sale) of stations over the years is a very important part of the history of radio.

If an interested party is seriously interested in taking the time to add this data to our database, please contact REC and we will give you the instructions for filing out the tables so they can be submitted to REC.

Records that have been enhanced with History Card data carry a large brown REC Radio History Project banner graphic at the top of the screen.  They can also be seen the Dialscape (list of stations by city) by a red H next to the frequency.

For a list of stations already archived, CLICK HERE!

BAPS File Recovery Project

Status: A 1995 file has been recovered resulting in approximately 1,400 AM, FM and TV engineering records being added to the database. 
REC has the capability to parse the FCC public data files that were provided through the FCC's FTP site from 1985 through 1999.  Using those raw files, REC appends the existing CDBS database with the missing engineering records so they appear in our database like if they were entered by CDBS (we do note that there are some data elements that modern CDBS records have that were not maintained in BAPS).  
The program will first run the youngest database file that we have to fill in the missing engineering records and then if there is an older file, it will use that file to fill in the blanks. 
REC is actively seeking older copies of FCC public data that was downloaded from the internet, especially from the 1980s.  If anyone has a copy of such files, especially from the 1980s, please contact REC so we can arrange for a copy of those files.  This data can help fill in more of the blanks in the FCC data. 
At this time, we have not built support for television records.  We will be soon providing television support for this initative in the Radio History Project.
Engineering records recovered through the BAPS File Recovery Project can be identified by engineering records displaying on the left side of with a red H.  Like with CDBS engineering records, clicking on the file number on the left side will bring up the application details and the map associated with the coordinates on file.

Public Notice Comment Recovery Project

Status: Phase 1 (electronic recovery of public notice data) has been completed.  We have identified more potential public notice data available which we have retrieved at this time for AM only.
Duriing the BAPS era, the FCC kept narratives about many engineering related applications similar to the notes they made during the History Card era.  While the engineering specifics were not carried over from BAPS to CDBS, the public notice comments do offer some level of research data.  
The REC Public Notice Recovery Project queries the FCC database during the off-peak overnight hours and weekends to slowly obtain these public notice comments and automatically add them to our database for display on  
Records with recovered Public Notice comments can be identified by a blue arrow to the left of the application record on the application list on the right side of the screen.  Clicking on the arrow will bring up the public notice comment directly under the application record. 

Public Notice Comment Engineering File Project

Status: (AM and FM) Markets 1 and 2 completed.    (TV) Development will at a future date.
Taking the public notice comments retrieved in the previous project, this project will take those comments and try to construct a basic engineering record, similar to the ones used in the History Card project to present a basic engineering history of the facility.  Engineering records that were manually entered based on public notice data will be indicated by a blue H on the engineering section (left side) of 

Radio Service Bulletin Digitization Project

Status: Basic data set as well as the linking to nearly 400 CDBS facilities has been completed.  The data is now live at  We are in the process of looking for typos and once we clear that, we will be working towards making open source data available. 

Starting in 1915, the Bureau of Navigation of the US Department of Commerce and eventually the Federal Radio Commission published the Radio Service Bulletin on a monthly basis (except during World War I) which was a publication mainly for radio operators and amateurs which gave information on new coastal and ship stations along with other land stations.  Eventually, the RSB would also include broadcast stations.  REC has digitzed data from 134 different issues of the Radio Service Bulletin starting with the creation of KDKA as a non-broadcast station in late 1920 until mid-1932.  A total of 1,786 facilities have been documented of which, over 650 were still in operation at the end of the data run (but not necessarily by the time when computers came along in 1978). The quality of the data is not perfect and there were many typographical errors in the original bulletins that had to be investigated and corrected.  Some changes were never published in the RSB so we had to go to alternate sources such as history cards and third parties in order to create as much of a history as possible.  Once completed, RSB data for hundreds of heritage AM stations as well as former call sign data for all 1700+ facilities will be available through  We plan to put in features to view deleted facilities and we plan to make the basic RSB data available to other radio historians under a Creative Commons license. 

Station records with RSB data will be indicated by a large green banner under the facility information.  To access the data, click on the "Historical Grid View" link.  Facilities with RSB data will be identified on the dialscape (list of stations by frequency in a particular community) by looking for a green H after the call sign.  RSB information also appears in the call sign history.

How you can get involved in the project

We would like to find people who have an interest in a particular metro market and work on the AM stations in that market.  Not only would this help others who wish to research these stations but it is an excellent learning experience in the history of broadcast radio in your area.  This involves data entry following a specific protocol into an REC-designed data entry tool.

We are also looking for anyone who just happens to have an old floppy or other media with a FCC database (BAPS) download from the FCC's FTP site or from the website. We are particularly interested in finding anything from before 1995.

Serious requests for participation in the project can be directed using the Contact REC Networks link on the REC website.  We estimate that it takes approximately 2 hours per station to compile the data (some stations, such as those started in the 1920s or 1930s and especially if they were daytime only stations may take much longer).

History Card and Public Notice Comments: Status by market  (06/19/23)

Market AM FM Public Notice Comments
New York Completed Completed AM/FM Completed
Los Angeles Completed Completed AM/FM Completed
Chicago Completed Completed  
San Francisco Completed (next up)  
Dallas-Forth Worth Completed    
Houston Completed    
Philadelphia Most    
Washington WA-WI calls    
Atlanta WA-WI calls    
Oxnard/Ventura, CA   93.5, 95.1, 95.9, 96.7, 104.7