You can pull up the FCC database for each of your station's call letters and read their licencing or you could call each station's engineer number; they we happily tell you.
http://www.fcc.gov/mb/video/tvq.html
EXAMPLE:
KPNX AZ MESA USA (Digital)
Licensee: MULTIMEDIA HOLDINGS CORPORATION
Service Designation: DT Digital television station
Channel: 36 602 - 608 MHz Licensed
File No.: BLCDT-20000628AEW Facility ID number: 35486
CDBS Application ID No.: 509254
33° 20' 0.00 " N Latitude Site in Mexican Border Zone
112° 03' 48.00" W Longitude (NAD 27)
Polarization: Horizontal (H)
Effective Radiated Power (ERP): 819. kW ERP
Antenna Height Above Average Terrain: 534. meters HAAT
Antenna Height Above Mean Sea Level: 891. meters AMSL
Antenna Height Above Ground Level: 83. meters AGL
TV Zone: 2
Non-Directional Antenna ID No.: 32902 Pattern Rotation: 0.00
Antenna Make: DIE Antenna Model: TFU-26GBH 06
Additional Individual Tower Information from the Antenna Structure Registration database.
(Use the Registration Number link for detailed information.)
ASRN
Site
Elevation
(meters) Overall Height
Above Ground
(meters) Overall Height
Above Mean Sea
Level (meters) NAD 83 Tower Coordinates
----------------------------------------------- Convert to
NAD 27
Latitude Longitude
1002073 808.6 117.4 926.0 N 33° 20' 0.0" W 112° 3' 51.0" To NAD27
CDBS: Station Info Application Info Mailing Address Assignments and Transfers
Application List CDBS Search Page Ownership Info EEO Call Sign Changes
Site: Region Map Area Map Local Map
Area: Service Contour Map (41 dBu) Alternate Map Link