ISO 8583 DE Reference
Format: bLength: 1 bitBitmap
DE 65

Bit Map, Extended

Data element
65
Format
b
Format defined in
ISO 8583:1987
Length
1 bit
Encoding type
bitmap
Bitmap
Secondary

What it is

ISO 8583:1987: "Bit map, extended", b 1 — a single bit reserved to signal a further bitmap; 1987 defines no data elements past 128. Some implementations treat a set bit 65 as the flag for a third (tertiary) 64-bit bitmap covering DE 129–192, and the ISO 8583 parser and bitmap tools here read it that way. Essentially unused in production networks.

Specification reference

Defined in ISO 8583:1987 (base). Card networks publish their own dialect tables (Visa BASE I / V.I.P., Mastercard CIS) that refine formats, lengths, and — for private-use elements — the entire layout. Always confirm against the interface specification you implement.

Decode & build this element

📦ISO 8583 Parser🗺️ISO 8583 Bitmap Decoder

Related data elements

DE 1Secondary Bitmap
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