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ExternalAccountIdentification1Code

AIIN Code: Issuer Identification Number

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AIIN means issuer identification number in the ISO 20022 account identification code set. Issuer Identification Number (IIN) - identifies a card issuing institution in an international interchange environment. Issued by ABA (American Bankers Association).

Code
AIIN
ISO name
IssuerIdentificationNumber
Status
Registered
Last updated
2016-04-01

Official definition

Issuer Identification Number (IIN) - identifies a card issuing institution in an international interchange environment. Issued by ABA (American Bankers Association).

Definition from the ISO 20022 External Code Sets, 2Q2026 (published 28 Aug 2026).

Messages and fields that use ExternalAccountIdentification1Code

MessageElement path
pacs.002TxInfAndSts/OrgnlTxRef/DbtrAcct/Id/Othr/SchmeNm/Cd, TxInfAndSts/OrgnlTxRef/CdtrAcct/Id/Othr/SchmeNm/Cd, TxInfAndSts/OrgnlTxRef/DbtrAgtAcct/Id/Othr/SchmeNm/Cd, TxInfAndSts/OrgnlTxRef/CdtrAgtAcct/Id/Othr/SchmeNm/Cd
pain.002OrgnlPmtInfAndSts/TxInfAndSts/OrgnlTxRef/DbtrAcct/Id/Othr/SchmeNm/Cd, OrgnlPmtInfAndSts/TxInfAndSts/OrgnlTxRef/CdtrAcct/Id/Othr/SchmeNm/Cd, OrgnlPmtInfAndSts/TxInfAndSts/OrgnlTxRef/DbtrAgtAcct/Id/Othr/SchmeNm/Cd, OrgnlPmtInfAndSts/TxInfAndSts/OrgnlTxRef/CdtrAgtAcct/Id/Othr/SchmeNm/Cd
pacs.004TxInf/RtrChain/DbtrAcct/Id/Othr/SchmeNm/Cd, TxInf/RtrChain/CdtrAcct/Id/Othr/SchmeNm/Cd, GrpHdr/SttlmInf/SttlmAcct/Id/Othr/SchmeNm/Cd, TxInf/OrgnlTxRef/DbtrAcct/Id/Othr/SchmeNm/Cd
camt.056Undrlyg/TxInf/OrgnlTxRef/DbtrAcct/Id/Othr/SchmeNm/Cd, Undrlyg/TxInf/OrgnlTxRef/CdtrAcct/Id/Othr/SchmeNm/Cd, Undrlyg/TxInf/OrgnlTxRef/DbtrAgtAcct/Id/Othr/SchmeNm/Cd, Undrlyg/TxInf/OrgnlTxRef/CdtrAgtAcct/Id/Othr/SchmeNm/Cd
camt.029ModDtls/OrgnlTxRef/DbtrAcct/Id/Othr/SchmeNm/Cd, ModDtls/OrgnlTxRef/CdtrAcct/Id/Othr/SchmeNm/Cd, ModDtls/OrgnlTxRef/DbtrAgtAcct/Id/Othr/SchmeNm/Cd, ModDtls/OrgnlTxRef/CdtrAgtAcct/Id/Othr/SchmeNm/Cd
pacs.008CdtTrfTxInf/DbtrAcct/Id/Othr/SchmeNm/Cd, CdtTrfTxInf/CdtrAcct/Id/Othr/SchmeNm/Cd, CdtTrfTxInf/DbtrAgtAcct/Id/Othr/SchmeNm/Cd, CdtTrfTxInf/CdtrAgtAcct/Id/Othr/SchmeNm/Cd
pacs.009CdtTrfTxInf/DbtrAcct/Id/Othr/SchmeNm/Cd, CdtTrfTxInf/CdtrAcct/Id/Othr/SchmeNm/Cd, CdtTrfTxInf/DbtrAgtAcct/Id/Othr/SchmeNm/Cd, CdtTrfTxInf/CdtrAgtAcct/Id/Othr/SchmeNm/Cd
pain.001PmtInf/DbtrAcct/Id/Othr/SchmeNm/Cd, PmtInf/ChrgsAcct/Id/Othr/SchmeNm/Cd, PmtInf/DbtrAgtAcct/Id/Othr/SchmeNm/Cd, PmtInf/CdtTrfTxInf/CdtrAcct/Id/Othr/SchmeNm/Cd

And 201 more messages: see the ExternalAccountIdentification1Code page.

AIIN questions

What does AIIN mean in ISO 20022?
AIIN is Issuer Identification Number in the ExternalAccountIdentification1Code code set: Issuer Identification Number (IIN) - identifies a card issuing institution in an international interchange environment. Issued by ABA (American Bankers Association).
Where does AIIN appear in a message?
For example in camt.056, element Undrlyg/TxInf/OrgnlTxRef/DbtrAcct/Id/Othr/SchmeNm/Cd.

All ExternalAccountIdentification1Code codes · ISO 20022 code sets

The ISO 20022 code names and definitions on this page are reproduced from material published at iso20022.org under the ISO 20022 Intellectual Property Rights policy. This is not the official source: the up-to-date ISO 20022 standards and repository material are published only at iso20022.org. Explanations in our own words are by ZagTrader. ZagTrader is not affiliated with or endorsed by ISO or Swift.