Please read the sctescan page a little closer-- Multiple SCTE-65 tables are broadcast in almost *all* systems. Only one of them applies to a given locale. You can either check which one is yours based on the set top box (instructions on the page) or using the process of elimination, which is much harder. Please use a set top box to determine the correct VCT_ID for your zip code and correct the page.
Update: I went back and looked, I see what you are saying regarding teh same ZIP in different cities having different VCT_IDs. I will clarify that this can happen on the page but it would help prevent conclusion if we didn't point to the one specific instance. Thanks for the info!