2021-03-26 2025-05-01 Specification Required or IESG Approval Jari Arkko, Jaime Jimenez mac MAC Addresses RFC9039, Section 4.1 ow 1-Wire Device Identifiers RFC9039, Section 4.2 org Organization-Defined Identifiers RFC9039, Section 4.3 os Organization Serial Numbers RFC9039, Section 4.4 ops Organization Product and Serial Numbers RFC9039, Section 4.5 example Reserved for examples RFC9039, Section 4.6 ueid Universal Entity ID sueid Semipermanent Universal Entity ID