The requested ZIP code is not a standard, publicly recognized USPS ZIP code. Standard ZIP codes in that region of Pennsylvania typically begin with 156 (e.g., Greensburg at 15601).
Looking up, Arthur saw a house appearing through the mist—a Victorian structure with windows that looked like watchful eyes. He realized then that 15608 wasn't a place on a map, but a destination for those who had stopped looking for the "correct" way and started looking for the truth.
Arthur had lived in Greensburg his entire life. He knew the 15601s and the 15644s like the back of his hand. But 15608 didn't exist. According to every map at the local post office, that sequence of numbers skipped right over the town’s reality.