"U" /
; for 0 0 0 0 user
"LPN" /
; for 0 0 0 1 private network serving the local user
"LN" /
; for 0 0 1 0 public network serving the local user
"TN" /
; for 0 0 1 1 transit network
"RLN" /
; for 0 1 0 0 public network serving the remote user
"RPN" /
; for 0 1 0 1 private network serving the remote user
"LOC-6" /
; for 0 1 1 0 spare
"INTL" /
; for 0 1 1 1 international network
"LOC-8" /
; for 1 0 0 0 spare
"LOC-9" /
; for 1 0 0 1 spare
"BI" /
; for 1 0 1 0 network beyond interworking point
"LOC-11" /
; for 1 0 1 1 spare
"LOC-12" /
; for 1 1 0 0 reserved for national use
"LOC-13" /
; for 1 1 0 1 reserved for national use
"LOC-14" /
; for 1 1 1 0 reserved for national use
"LOC-15" /
; for 1 1 1 1 reserved for national use