Each channel have sub-channels and it can be from 1 to 6. There are 18 channels available to us (in my area code), each with their sub-channels. Some of them were on cable but not all (I don't think). Some are independent channels.
They are over the air so they're free. After I trimmed my channels I got:
04. 1-2
05. 1-3
09. 1-2-3-4
12. 1-2
17. 3
23. 3-5
24. 2
26. 1-2-3
29. 1-2
35. 1
41. 2-3
60. 3
That's out of total of 49 channels I scanned. Some are digital and some analog. Also VHF and UHF.
This is what I scanned:
Channel-antenna type (color)-Distance of station-direction from me
04.1-2-x-x-x-x yel-14 miles-107 degree
05.1-2-3-x-x-x yel-14 miles-107 degree
09.1-2-3-4-x-x yel-08 miles-091 degree
12.1-2-x-x-x-x yel-15 miles-106 degree
14.x-x-x-x-x-x grn-08-miles-354 degree
17.1-2-3-x-x-x yel-25 miles-357 degree
19.1-2-3-4-x-x yel-08 miles-354 degree
23.1-2-3-4-5-x grn-07 miles-360 degree
24.1-2-3-4-x-x yel-14 miles-100 degree
26.1-2-3-4-5-6 red-39 miles-301 degree
28.x-x-x-x-x-x grn-08 miles-354 degree
29.1-2-x-x-x-x yel-14 miles-101 degree
34.x-x-x-x-x-x grn-07 miles-360 degree
35.1-2-x-x-x-x yel-31 miles-309 degree
41.1-2-3-x-x-x yel-14 miles-100 degree
46.1-2-x-x-x-x grn-08 miles-091 degree
51.x-x-x-x-x-x grn-08 miles-354 degree
60.1-2-3-x-x-x yel-14 miles-100 degree
Channels on my list but cannot get:
16.1 yel 14 miles 101 degree
10.1 grn 08 miles 354 degree
20.x grn 14 miles 340 degree
31.x grn 08 miles 353 degree
42.x grn 25 miles 006 degree
02.1 blu 56 miles 353 degree
06.x blu 08 miles 354 degree
Go here to find out yours.
Free HDTV in Your City: Channels, Towers and Antenna Guidelines.