The FAA.

You'll need to find a local office that has service after hours. The local AM radio stations will have that number as it's the one they have to call if they lose their tower or beacon lights on their antennas. FM stations typically don't have/need the huge towers.

Quoted: I'd guess the automated system already notified the owner that the lights failed.  They call the FAA and they do their thing.  The strobes were out on a 700 TV tower around here for almost a year until they got it fixed. The local AM radio stations will have that number as it's the one they have to call if they lose their tower or beacon lights on their antennas. FM stations typically don't have/need the huge towers. Paul, don't you mean the other way around?  The FM's I've worked had the antenna at the max AMSL the FCC would allow.  AMs were down by the river with a fractional wavelength stick.

Possibly, I don't know what they do out in the great plains having only worked in bigger cities and areas with mountains.

FM stations use arrays of elements that form a bay. An FM station will have several bays for the gain which is cheaper than a bigger amplifier. These bays are usually just a few feet across. An AM station will have an active tower hundreds of feet tall. The AM station will be the only transmitter on their antenna. The FM guys will and have several stations, microwave relays, commerical repeaters, cell phones, and as many other things as tgather together he owner of the tower can jam on there. You'd have to know who the owner of the tower was as they provide the lights as a service.

Since we do mountains around here the FM stations don't need the towers they might use elsewhere. They'll mount on a downtown highrise or the peak of a mountain. The AM guys need the huge tower set away from other metal structures. Any radio station that has a tower has to get thier lights once every 24-hours and have two hours (?) to notify the FAA after they discover the loss of lights. Most will have automatic circuits to detect the light and have dual filaments in the bulbs which failover automatically.