t.v channels numbers you never get

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in my area and cable company,never had
channel 1, 9 or 11,don't know why.

You used to be able to get up to channel 72 on basic cable here, now it's only up to channel 64.

Here in the US, channel 1 never really existed. As for the cable company, I was told technically, in the past, before the advent of Digital transmission, there would be issues on putting a broadcast channel on the same cable channel. For example, before the digital transition, Comcast could not put WBAL-TV11, WMAR-TV2 or WJZ-TV13 on channels 2, 11, or 13 in their Baltimore System because of interference. Nowadays, it makes no difference, since those stations have been moved to different frequencies (WBAL-TV is still on channel 11 after shutting down its analog transmitter, and moving its digital signal from channel 59. WMAR-TV moved their signal to channel 38 after the transition and WJZ-TV still remains on channel 13 after the transition. I have no Idea where WBFF-TV45, Maryland Public Television. (Channel 68) or WNUA-TV52 ended up.)

I sometimes try to make sense of cable channel numbering, but usually give up and choose just to view them as randomly assigned.

In my area, the ABC affiliate NEVER bothered to upgrade so that we could get their signal...even though they are no further away than other channels as far as where they clam to broadcast from. The mountains are the main culprit.

We used to get PBS, but when everyone went to HDTV, we lost them. Analog signals can be fairly weak and STILL be good enough to get a decent picture/sound on the receiving end. If a digital signal breaks down to about 70% signal strength, it's difficult to lock on. So, PBS went digital (which should have a 200-mile range) and with the mountains, it doesn't even come close to that.