While not a U.S. ZIP code, "103023" appears in several international and administrative databases:
Companies like Old Hickory Buildings use this number as part of their specific product inventory serials (e.g., HLB-L16745-1012-103023-SP). 103023 zip
It is also recorded as the population count for the 606302 postal area in Tamil Nadu. While not a U
Similar codes like 33023 (Miramar/Hollywood, FL) are often confused with six-digit numeric strings. While not a U.S. ZIP code