ASN.1 Object Identifiers

Abstract syntax notation (ASN.1) object identifiers maintained by ETSI.
ETSI is a recognized organization under the ITU-T (formerly CCITT) arc. The formal rules governing assignment of object identifier values are given in ETSI EG 200 351.
Since the original 3GPP technical specifications were based on GSM specifications, which use object identifiers under the ETSI node, it was decided that the 3GPP specifications would use the same arc. This ensures compatibility between GSM and UMTS / LTE / 5G networks.
Both ETSI and 3GPP are recognized organizations under the ISO arc. These arcs (ISO...ETSI... and ISO...3GPP...) are used for Internet-related protocols.
For further information on the allocation of object identifiers within the ETSI domain, see http://portal.etsi.org/pnns/asn1oids.asp .