ISO 8583 · Data fields

Field 43Card Acceptor Name/Location

pyiso8583 starter profilesIndependent explanation

What this field describes

This forty byte container holds card acceptor name and location information in the selected profiles.

Check the required internal layout before combining text. The starter profile gives the total container length, not the positions of every name or location component.

Compare the two profiles

Container settings from the pinned pyiso8583 source.
Settingdefaultdefault_ascii
Value encodingASCIIASCII
Length limitExactly 40 bytesExactly 40 bytes
PrefixNoneNone

Length limits describe encoded values. They exclude any length prefix. The profiles can be customized; these settings do not establish the required fields or accepted values for a live connection.

Read the field boundary

Field 4340 bytesASCII value

Read exactly 40 value bytes. The next field begins immediately afterwards under this profile; no length prefix belongs to this field.

Find it in the bitmap

Bitmap
Primary
Position
43
Byte
6
Bit in byte
3

Positions start at one. Bits are counted from the most significant bit of each bitmap byte. This calculation locates the field’s presence indicator, not its value.