U. Simmons Post Office Posted on March 9, 2021 (April 5, 2025) by myviadmin U. Simmons Post Office Zip Codes 00830 (Streets) and 00831 (PO Box)… Claimed Open Now 1 2 3 4 50.000 St. John Post Office Service Bookmark Contact Information 100 Vester Gade, Other - St. John, 00830 340-779-4227 LocationSt. John Detailed Information Accessible Beach Front Outdoor Indoor American Express Travelers Check Personal Check Discover Mastercard Visa Cash Sunday Closed Monday 7:00 am - 6:00 pm Tuesday 7:00 am - 6:00 pm Wednesday 7:00 am - 6:00 pm Thursday 7:00 am - 6:00 pm Friday 7:00 am - 6:00 pm Saturday 7:00 am - 5:00 pm