I’ve noticed that some cable providers are quicker to carry new subchannels than others. Xfinity I think usually picks them up fairly quickly, and Verizon comes in a close second. However, there are several subchannels in my market that are not carried by any providers. Most notably the subchannels of WSBK MyTV38. It has 4 subchannels.l; Heroes&International, Comet, Charge!, and Circle. None of the providers carry them. And WUTF 27 (UniMas) which used to be WUNI (Univision) has 4 subchannels too. LATV is carried, but none of the others are. Verizon has carried the WUNI (previously WUTF) subchannels for a long time, but Xfinity never has. And for Rhode Island PBS, they carry the main channel in the Boston market even though it’s an out of market channel, but not their subchannel, but they do in the Providence market.