Thanks for the correction. Under FCC regs, the stations themselves must report being off the air after so many hours or days-- I've read the time threshold, but I don't remember. I think it's two days-- but I really don't remember. This includes "Act of God" silences-- toppled towers, etc. But the FCC doesn't post the stations as silent until two months have elapsed. I've also noticed some errors on the lists, too. For example, there is no "Silent TV List" as such, but if you go to the CDBS database and click on "licensed and silent" for television stations, you'll come up with another list but this one has many errors. Several New Orleans TV stations are listed as being off the air since Katrina when in fact, as far as I know, they have been long back on the air.
Here is the CDBS page listing silent stations as of COB Friday:
http://fjallfoss.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/sta_list.pl
Readers from across the country might want to look at this list and determine how accurate this list is. For example, as far as I know, KNXT Fresno is back on the air-- otherwise the $1.4 million they are paying for a high-power LPTV in Bakersfield would be strange. I should point out that the list above is for ANALOG stations. The licensed and silent DTV list is
http://fjallfoss.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/sta_list.pl but there are no stations listed on this page.
One could also check out the AM and FM stations oneself --
Silent AM's as of Friday totaled 56:
http://fjallfoss.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/sta_list.pl
Silent FM's as of Friday totaled 42:
http://fjallfoss.fcc.gov/cgi-bin/ws.exe/prod/cdbs/pubacc/prod/sta_list.pl
There are errors here, too, I think. For example, WHYC is still listed off the air, and so is KTRM Truman State University in Kirksville, Missouri, which I believe is in error. I wonder, too, about the other college stations, since so many such stations are notorious regulation infractors, it is possible that they have been on the air a long time and have never bothered to tell the Feds. More than a few had failed to renew their licenses in time and were operating long after these licenses had expired-- and quite a few have gotten $7000 and even $10000 fines as a result.
A few of these AM-FM stations are off because of fire, ice storm, etc., and a few are off for financial reasons (AM particularly); a click on the links sometimes gives the reason but at other times you have to open up the application file itself to determine the reason. In other cases, usually where there are financial problems and the station is being sold, the owner has taken it off the air. In other cases, the owner has applied for a Class increase in facilities and has taken off a low-power Class A until the new facilities are built-- or until he finds a buyer who will do the same. There is a world of fascinating information in some of the applications themselves if one bothers to go through the various link-steps to find out the information.