Lexmark FORMS 249X Technical Reference page 168

POSTNET
This all-numeric symbology is used to express U.S. Postal Service ZIP codes.
k value:
m value:
s value:
minimum v1, v2 values:
c parameter:
n1 value (b0=0):
n1 value (b0=1):
n2 value:
data character set:
Character
168
Section 8: Barcodes
185, xB9
0 to 4, x00 to x04
ignored
ignored; POSTNET uses two different bar lengths
only: a long bar and a short bar. For 248x printers,
the actual lengths of the long bar and short bar are
18/144 inch and 6/144 inch, respectively. For 249x
printers, the actual lengths of the long bar and short
bar are 24/180 inch and 8/180 inch, respectively.
available functions:
b0, check digit
6, x06
10, x0A
12, x0C
5, x05
9, x09
11, x08
Hex
'0' x30
'1' x31
'2' x32
'3' x33
'4' x34
'5' x35
'6' x36
'7' x37
'8' x38
'9' x39
5-digit ZIP code
ZIP+4
Delivery Point Barcode (DPBC)
5-digit ZIP code
ZIP+4
Delivery Point Barcode (DPBC)
0, x00