OID value: 0.4
(This assignment is a change from X.208 to X.680)
Quoting X.680: "The arcs below "identified-organization" are assigned values by the ITU Telecommunication Standardization Bureau (TSB). Arcs below this are determined as necessary by the organizations identified by the value of the ITU."
ETSI is the only known user of this arc.
See also the OID Repository website reference for 0.4