East Lynwood Post Office Lynwood CA 11634 Atlantic Avenue 90262 310-638-9074 Lynwood Post Office Lynwood CA 11200 Long Beach Boulevard 90262 310-638-9074. Post Office in Knoxville, TN - Fountain City Location Fountain City Post Office 131 Lynnwood Dr, Knoxville, TN 37918 Contact Numbers Phone: 865-687-7985 Fax: 865-687-9800 TTY: 877-889-2457 Toll-Free: 1-800-Ask-USPS® (275-8777) Retail Hours Monday 8:30am - 5:00pm Tuesday 8:30am - 5:00pm Wednesday 8:30am - 5:00pm Thursday 8:30am - 5:00pm. About Address: 131 Lynnwood Dr, Knoxville TN 37918 Large Map & Directions Phone: 865-687-7985 Fax: 865-687-9800 TTY: 877-889-2457 Toll-Free: 1-800-Ask-USPS® (275-8777) Retail Hours: Monday: 8:30AM - 5:00PM Tuesday: 8:30AM - 5:00PM Wednesday: 8:30AM - 5:00PM Thursday: 8:30AM - 5:00PM Friday: 8:30AM - 5:00PM Saturday: 8:00AM - 12:00PM Sunday: CLOSED.