You can get 40 free channels in ZIP 21797 (Mount Airy, MD)
Measured from the U.S. Census center of ZIP 21797 · 16 channels have a Strong indoor-ready signal.
Indoor Window or Tabletop Antenna
16 stations arrive with a Strong signal here. Place a quality indoor antenna near a window or wall facing the towers.
🧭 Broadcast Tower Compass — Which Way to Point Your Antenna
Each dot is a local TV tower relative to your center point (● Green = Strong, ● Blue = Moderate, ● Amber = Weak).
Primary Aim Direction: SSE (150°)
Place your indoor antenna near a window or exterior wall facing SSE (150°), or aim your attic/rooftop antenna toward that compass bearing for the strongest signal lock.
After placing or moving your antenna, always run a fresh TV channel rescan.
Channel Lineup & Tower Directions for ZIP 21797
Sorted with Strong signals and major broadcast networks first. Channel is the virtual channel number your TV displays; Band / RF Ch. is the actual radio frequency that determines whether you need a VHF-capable antenna. How we calculate signals.
| Channel | Network | Station | Distance | Point Antenna | Band / RF Ch. | Estimated Signal |
|---|---|---|---|---|---|---|
| 2 | ABC | WMAR-TV Baltimore, MD · Full Power | 22.3 mi | E (89°) | UHF RF 27 | ● Strong — Indoor OK |
| 7 | ABC | WJLA-TV Washington, DC · Full Power | 26.3 mi | S (181°) | High VHF RF 7 | ● Strong — Indoor OK |
| 13 | CBS | WJZ-TV Baltimore, MD · Full Power | 22.3 mi | E (89°) | High VHF RF 11 | ● Strong — Indoor OK |
| 9 | CBS | WUSA Washington, DC · Full Power | 26.3 mi | S (181°) | High VHF RF 9 | ● Strong — Indoor OK |
| 11 | NBC | WBAL-TV Baltimore, MD · Full Power | 22.3 mi | E (89°) | High VHF RF 12 | ● Strong — Indoor OK |
| 45 | FOX | WBFF Baltimore, MD · Full Power | 22.4 mi | E (89°) | UHF RF 26 | ● Strong — Indoor OK |
| 5 | FOX | WTTG Washington, DC · Full Power | 25.5 mi | S (184°) | UHF RF 36 | ● Strong — Indoor OK |
| 62 | PBS | WFPT Frederick, MD · Full Power | 13.9 mi | WSW (250°) | UHF RF 28 | ● Strong — Indoor OK |
| 67 | PBS | WMPB Baltimore, MD · Full Power | 17.4 mi | ENE (62°) | UHF RF 22 | ● Strong — Indoor OK |
| 26 | PBS | WETA-TV Washington, DC · Full Power | 26.3 mi | S (181°) | UHF RF 31 | ● Strong — Indoor OK |
| 54 | CW | WNUV Baltimore, MD · Full Power | 22.4 mi | E (89°) | UHF RF 25 | ● Strong — Indoor OK |
| 24 | MyNetworkTV | WUTB Baltimore, MD · Full Power | 22.4 mi | E (89°) | UHF RF 26 | ● Strong — Indoor OK |
| 20 | MyNetworkTV | WDCA Washington, DC · Full Power | 25.5 mi | S (184°) | UHF RF 36 | ● Strong — Indoor OK |
| 66 | ION | WPXW-TV Manassas, VA · Full Power | 25.5 mi | S (184°) | UHF RF 35 | ● Strong — Indoor OK |
| 68 | Univision | WJAL Silver Spring, MD · Full Power | 26.3 mi | S (181°) | High VHF RF 9 | ● Strong — Indoor OK |
| – | Local / LPTV | W24FL-D Thurmont, MD · Low Power | 6.6 mi | NNW (335°) | UHF RF 24 | ● Strong — Indoor OK |
| 4 | NBC | WRC-TV Washington, DC · Full Power | 27.0 mi | S (182°) | UHF RF 34 | ● Moderate — Window / High Indoor |
| 8 | NBC | WGAL Lancaster, PA · Full Power | 54.2 mi | NNE (26°) | High VHF RF 8 | ● Moderate — Window / High Indoor |
| 32 | PBS | WHUT-TV Washington, DC · Full Power | 26.3 mi | S (181°) | UHF RF 33 | ● Moderate — Window / High Indoor |
| 22 | PBS | WMPT Annapolis, MD · Full Power | 33.1 mi | SE (132°) | UHF RF 21 | ● Moderate — Window / High Indoor |
| 50 | CW | WDCW Washington, DC · Full Power | 27.0 mi | S (182°) | UHF RF 15 | ● Moderate — Window / High Indoor |
| 14 | Univision | WFDC-DT Arlington, VA · Full Power | 27.0 mi | S (182°) | UHF RF 15 | ● Moderate — Window / High Indoor |
| 44 | Local / LPTV | WZDC-CD Washington, DC · Class A | 27.0 mi | S (182°) | UHF RF 34 | ● Moderate — Window / High Indoor |
| 25 | NBC | WDVM-TV Hagerstown, MD · Full Power | 57.4 mi | WSW (244°) | UHF RF 23 | ▲ Weak — Outdoor / Attic |
| 31 | PBS | WWPB Hagerstown, MD · Full Power | 52.9 mi | WNW (295°) | UHF RF 29 | ▲ Weak — Outdoor / Attic |
| 60 | ION | WWPX-TV Martinsburg, WV · Full Power | 38.1 mi | W (261°) | High VHF RF 13 | ▲ Weak — Outdoor / Attic |
| – | Local / LPTV | W04EA-D Washington, DC · Low Power | 27.0 mi | S (181°) | Low VHF RF 4 | ▲ Weak — Outdoor / Attic |
| – | Local / LPTV | WDME-CD Washington, DC · Class A | 27.0 mi | S (181°) | UHF RF 20 | ▲ Weak — Outdoor / Attic |
| – | Local / LPTV | WDCO-CD Woodstock, VA · Class A | 27.0 mi | S (181°) | UHF RF 24 | ▲ Weak — Outdoor / Attic |
| – | Local / LPTV | WIAV-CD Washington, DC · Class A | 27.0 mi | S (181°) | UHF RF 30 | ▲ Weak — Outdoor / Attic |
| 27 | ABC | WHTM-TV Harrisburg, PA · Full Power | 68.3 mi | N (5°) | High VHF RF 10 | ○ Fringe — Deep Outdoor |
| 21 | CBS | WHP-TV Harrisburg, PA · Full Power | 70.9 mi | N (9°) | UHF RF 32 | ○ Fringe — Deep Outdoor |
| 15 | CW | WXBU Lancaster, PA · Full Power | 70.9 mi | N (9°) | UHF RF 32 | ○ Fringe — Deep Outdoor |
| 49 | Independent | WLYH Red Lion, PA · Full Power | 68.3 mi | N (5°) | High VHF RF 10 | ○ Fringe — Deep Outdoor |
| – | Local / LPTV | WMDO-CD Washington, DC · Class A | 27.0 mi | S (182°) | UHF RF 14 | ○ Fringe — Deep Outdoor |
| – | Local / LPTV | WWTD-LD Washington, DC · Low Power | 27.0 mi | S (182°) | UHF RF 14 | ○ Fringe — Deep Outdoor |
| – | Local / LPTV | WRZB-LD Washington, DC · Low Power | 27.0 mi | S (182°) | UHF RF 32 | ○ Fringe — Deep Outdoor |
| – | Local / LPTV | WLZH-LD Baltimore, MD · Low Power | 30.0 mi | ENE (65°) | UHF RF 14 | ○ Fringe — Deep Outdoor |
| – | Local / LPTV | WDCN-LD Fairfax, VA · Low Power | 32.6 mi | SSW (195°) | Low VHF RF 6 | ○ Fringe — Deep Outdoor |
| 36 | Local / LPTV | WMDE Dover, DE · Full Power | 58.4 mi | ESE (116°) | Low VHF RF 5 | ○ Fringe — Deep Outdoor |
Closest city guide: Mount Airy, MD Free TV Channels (5.5 mi from ZIP 21797 center) · Browse all Maryland cities & ZIPs.
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