Unix time-ordered UUID (version 7)

ID uuid_v7

DatatypeNot PIIidentifierDraft

This record is a draft: it has not been reviewed yet and may be incomplete or wrong. Do not rely on it for compliance decisions. Help improve it (see CONTRIBUTING.md).

UUID of version 7, introduced by RFC 9562 in 2024. The first 48 bits are the Unix time in milliseconds, and the rest, apart from the version and variant bits, is random or a counter. Values sort by creation time, which suits database keys, and RFC 9562 recommends this version over versions 1 and 6. The creation time can be read back from the first 12 hexadecimal digits. The version digit, the first digit of the third group, is 7. PostgreSQL 18 makes it with uuidv7() and Python 3.14 with uuid.uuid7().

Parent datatype: Universally unique identifier (UUID) uuid
Categories: Universal unique identifiers
Countries: Global (not tied to a country)
Languages: Common to most languages
Quality: 80/100 · missing: mapping (Wikidata, Schema.org, ...), detector coverage
Metacrafter rules: no detection rule yet
Supported by tools: no tool record lists this type yet

Regular expression

^[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-7[0-9A-Fa-f]{3}-[89ABab][0-9A-Fa-f]{3}-[0-9A-Fa-f]{12}$

Python re syntax.

Examples

Value	Description
017F22E2-79B0-7CC3-98C4-DC0C0C07398F	UUIDv7 test vector of RFC 9562 (Appendix A.6), created 2022-02-22 19:22:22 UTC
01890a5d-ac96-774b-bcce-b302099a8057	UUIDv7 of the valid-uuidv7 test case of the TypeID specification
919108f7-52d1-4320-9bac-f847db4148a8 invalid	UUIDv4
1EC9414C-232A-6B00-B3C8-9F6BDECED846 invalid	UUIDv6

Translations

Language	Name	Description
Russian	UUID версии 7 (упорядоченный по времени Unix)

Sources

doc: https://www.rfc-editor.org/rfc/rfc9562#name-uuid-version-7

Use this record

Page URL: http://registry.apicrafter.io/datatype/uuid_v7
JSON: API v1 · legacy shape (used by metacrafter) · Markdown (for LLMs)
Improve it: edit data/datatypes/any/identifiers/uuid_v7.yaml on GitHub