What does DUNS mean in ISO 20022?

DUNS is Request Data Universal Numbering System in the ExternalInvestigationReasonSubType1Code code set: Data universal number is requested. This is a unique identification number provided by Dun & Bradstreet to identify an organisation.

Where does DUNS appear in a message?

For example in camt.110, element InvstgtnData/RsnSubTp/Cd.

ExternalInvestigationReasonSubType1Code

DUNS Reason Code: Request Data Universal Numbering System

Written and maintained by ZagTrader. Last reviewed 21 October 2026. How this page is sourced and checked

DUNS means request data universal numbering system in the ISO 20022 investigation reason sub type code set. Data universal number is requested. This is a unique identification number provided by Dun & Bradstreet to identify an organisation.

Code: DUNS
ISO name: RequestDataUniversalNumberingSystem
Status: Registered
Last updated: 2024-02-28

Official definition

Data universal number is requested. This is a unique identification number provided by Dun & Bradstreet to identify an organisation.

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

Messages and fields that use ExternalInvestigationReasonSubType1Code

Message	Element path
camt.110	InvstgtnData/RsnSubTp/Cd
camt.111	InvstgtnRspn/InvstgtnData/OrgnlInvstgtnRsnSubTp/Cd

DUNS in other code sets

DUNS in ExternalOrganisationIdentification1Code

DUNS questions

What does DUNS mean in ISO 20022?: DUNS is Request Data Universal Numbering System in the ExternalInvestigationReasonSubType1Code code set: Data universal number is requested. This is a unique identification number provided by Dun & Bradstreet to identify an organisation.
Where does DUNS appear in a message?: For example in camt.110, element InvstgtnData/RsnSubTp/Cd.

All ExternalInvestigationReasonSubType1Code 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.