Organization Information Address Management Post Office Changes   Old/New Finance No. ZIP Code State P.O. Name County/Parish Station/Branch/Unit Unit Type Effective Date Comments Old 35-7635 13150 NY Sennett Cayuga Main Office Post Office 01/23/1993   New 35-0370 13021 NY Auburn Cayuga Sennett Place Name 01/23/1993 Post Office™ and ZIP Code™ discontinued. Establish a Place Name. Sennett, NY becomes an acceptable last line for use with ZIP Code 13021. This amends Postal Bulletin 21836. Old 35-6590 12139 NY Piseco Hamilton Main Office Post Office 01/23/1993   New 35-4545 12139 NY Lake Pleasant Hamilton Piseco Classified Branch 01/23/1993 Post Office discontinued. Retain ZIP Code. Establish a Classified Branch. Use Piseco, NY 12139 as the last line of address. This amends Postal Bulletin 21836. — Address Management, Addressing and Geospatial Technology, 8-15-19