Who should be contacted if the control tower is not known when requesting a TFR?

When requesting a Temporary Flight Restriction (TFR) and the control tower is not known, the appropriate contact is the Federal Aviation Administration (FAA). The FAA manages air traffic control and oversees the airspace regulations, which includes issuing TFRs. They have the necessary resources and authority to assist in identifying the relevant control tower and providing guidance on the TFR request process.

In circumstances where local control towers are not immediately identifiable, the FAA serves as the central point of contact to ensure that airspace operations are conducted safely and effectively. They can also relay necessary information to the appropriate authorities if there are aviation safety concerns.

Other options, while potentially useful in various emergency situations, do not have the same level of authority or direct involvement in air traffic regulations as the FAA does, making them less appropriate contacts for this specific scenario.