Pancota and Santana are both cities within the Arad County (Judetul Arad) region. Arad's zipcode is 2900 and thus 2911 would definetely make sence for Pancota. The number 20 could have to do with the house number, in villages there are often no street names and each house gets a number instead. As a result 20 could be the house number. Pancota is big enough that I would expect the numbers to be much larger though, at least in the hundreds. But then again, you have to start somewhere and thus 20 could be the house number. It is also not unuasual to put the house number after the street example "Strada Bucuresti #22." As far as Santana, I'm not sure what it's zipcode is and I'm in the states right now. I'll be back in Arad in 3 weeks and I can find out then. Anyway, Thanks for your interest!