3DS ReferenceProtocol & field guide

EMV 3-D Secure · Core specification 2.3.1.1

Acquirer Country CodeacquirerCountryCode

The code of the country where the acquiring institution is located (in accordance with ISO 3166-1). The DS may edit the value provided by the 3DS Server.

Explore this field with transaction context

Message inclusion

Baseline inclusion. Effective requirements depend on transaction context. Check the field’s conditions and FAQ qualifications; select channel and category in the explorer.

MessageBaseline inclusion
AReqRequired

Format and scope

Type: String · Length: 3 characters · Minimum length: 3 · Maximum length: 3

Source components
3DS Server, DS
Device channels
01-APP, 02-BRW, 03-3RI
Message categories
01-PA, 02-NPA

Version history

Field introduction tag: 2.3.1.1. Introduction tags are curated metadata, not a full history of changes. Compare versions and understand coverage.

Source and review status

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf, Table A.1, PDF pages 200

Source review status: carried-forward. Carried-forward material has not acquired a new verification claim.

Source document fingerprint

EMV_3DS_CoreSpec_v2.3.1.1_20230530.pdf

6fdf0aba3fc1a765f96b74dad4069d1e189969f38f0023647021687daf589d6b

Official EMVCo specifications · Methodology and coverage limits