The nine-digit code, established in 1981, composed of: The first five digits identify the individual post office or metropolitan area delivery station associated with the address and the additional four digits identify a) Sector: The first two additional digits designate a geographic portion of a zone. It can also indicate a portion of a rural route, part of a box section or official designation, b) Segment: The last two additional digits designate a specific block face, apartment house, bank of boxes, firm, building or other specific delivery locations.
Return To Glossary