---
oid: "2"
description: "Areas of joint work between ISO/IEC (International Organization for Standardization/International Electrotechnical Commission) and ITU‑T (International Telecommunication Union – Telecommunication standardization sector), and other international work"
last-modified: "2026-04-14"
parent-oid: ""
---

## OID: `2`

```asn1
{joint-iso-itu-t(2)}
```

"joint-iso-itu-t" is a standardized identifier, i.e. it may be used without its associated number in the ASN.1 notation.

Other identifiers that can be used in the last arc of the ASN.1 notation: `joint-iso-ccitt`

### Description

Areas of joint work between ISO/IEC (International Organization for Standardization/International Electrotechnical Commission) and ITU‑T (International Telecommunication Union – Telecommunication standardization sector), and other international work

**Classification:** Standards development organization (SDO)

### Supplementary information

This OID was allocated by [Rec. ITU-T X.660](https://itu.int/ITU-T/X.660) \| ISO/IEC 9834-1. 
 
This OID is jointly administered by ISO and ITU-T according to [Rec. ITU-T X.662](https://itu.int/ITU-T/X.662) \| ISO/IEC 9834-3 "Procedures for the Operation of OSI Registration Authorities: Registration of Object Identifier Arcs for Joint ISO and ITU-T Work". As a consequence, all requests for registration must be jointly approved by ITU-T Study Group 17 and ISO/IEC JTC 1/SC 6. Child OIDs are recorded in the [Register of arcs beneath the root arc with primary integer value `2`](https://itu.int/go/X660). 
 
New child OIDs will be allocated a number greater than `47`, except if there is a good rationale that a compact binary encoding is needed, in which case a number less or equal to `47` can be allocated so that the OID encodes on a single octet.

### Registrant

Name: ITU-T SG17 & ISO/IEC JTC 1/SC 6

### Child OIDs

- `2.0`: `presentation(0)`
- `2.1`: `asn1(1)`
- `2.2`: `association-control(2)`
- `2.3`: `reliable-transfer(3)`
- `2.4`: `remote-operations(4)`
- `2.5`: `ds(5)`
- `2.6`: `mhs(6)`
- `2.7`: `ccr(7)`
- `2.8`: `oda(8)`
- `2.9`: `ms(9)`
- `2.10`: `transaction-processing(10)`
- `2.11`: `dor(11)`
- `2.12`: `reference-data-transfer(12)`
- `2.13`: `network-layer(13)`
- `2.14`: `transport-layer(14)`
- `2.15`: `datalink-layer(15)`
- `2.16`: `country(16)`
- `2.17`: `registration-procedures(17)`
- `2.18`: `physical-layer(18)`
- `2.19`: `mheg(19)`
- `2.20`: `genericULS(20)`
- `2.21`: `transport-layer-security-protocol(21)`
- `2.22`: `network-layer-security-protocol(22)`
- `2.23`: `international-organizations(23)`
- `2.24`: `sios(24)`
- `2.25`: `uuid(25)`
- `2.26`: `odp(26)`
- `2.27`: `tag-based(27)`
- `2.28`: `its(28)`
- `2.40`: `upu(40)`
- `2.41`: `bip(41)`
- `2.42`: `telebiometrics(42)`
- `2.48`: `cybersecurity(48)`
- `2.49`: `alerting(49)`
- `2.50`: `ors(50)`
- `2.51`: `gs1(51)`
- `2.52`: `uav(52)`
- `2.999`: `example(999)`

This is a [frozen OID](https://oid-base.com/faq.htm#leaf) (no more child OIDs can be added to the existing ones).

### Terms of Use

[Terms of use](https://oid-base.com/disclaimer.htm.md)