Record Type Z - ZIP+4 Codes  

Field   BV  Fmt Type Beg End Len Description
RT      No   L   A    1    1  1  Record Type
VERSION No   L   N    2    5  4  Version Number
TLID    No   R   N    6   15 10  TIGER/Line ID, Permanent 1-Cell Number
RTSQ    No   R   N   16   18  3  Record Sequence Number
ZIP4L   Yes  L   N   19   22  4  +4 Postal Add-On Code, Left
ZIP4R   Yes  L   N   23   26  4  +4 Postal Add-On Code, Right