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 Record 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

