---
title: "Colégio Notarial do Brasil - OID assignment"
description: "OIDs of the Colégio Notarial do Brasil (CNB) under 1.3.6.1.4.1.51928: certificate policies for titular and substitute notaries and for the mobile app."
canonical: "https://docs.lacunasoftware.com/en-us/articles/asn1-cnb"
locale: "en"
product: "Amplia"
last_updated: "2026-10-12"
---

# Colégio Notarial do Brasil - OID assignment

The OID 1.3.6.1.4.1 represents the [Private Enterprise Numbers registry](https://www.iana.org/assignments/enterprise-numbers) of the Internet Assigned Numbers Authority (IANA):

```asn1
id-pen-iana OBJECT IDENTIFIER ::= { 1 3 6 1 4 1 }
```

The **Colégio Notarial do Brasil - CNB** (the Brazilian notaries' association) is registered under number **51928**, and therefore owns the OID `1.3.6.1.4.1.51928` and the corresponding OID arc:

```asn1
id-cnb OBJECT IDENTIFIER ::= { id-pen-iana 51928 }
```

## 1. Certificate policies

The sub-arc `1.3.6.1.4.1.51928.1` is reserved for certificate policy identifiers:

```asn1
id-cnb-cert-policies OBJECT IDENTIFIER ::= { id-cnb 1 }
```

### 1.1. Titular notary certificate policy

The OID `1.3.6.1.4.1.51928.1.1` identifies the **titular notary certificate policy**, exclusive to certificates **issued to the titular holders of notary offices**.

```asn1
id-cnb-notary-cert-policy OBJECT IDENTIFIER ::= { id-cnb-cert-policies 1 }
```

### 1.2. Mobile app certificate policy

The OID `1.3.6.1.4.1.51928.1.2` identifies the **mobile app certificate policy**:

```asn1
id-cnb-mobile-cert-policy OBJECT IDENTIFIER ::= { id-cnb-cert-policies 2 }
```

### 1.3. Substitute notary certificate policy

The OID `1.3.6.1.4.1.51928.1.3` identifies the **substitute notary certificate policy**, exclusive to certificates **issued to substitute notaries**.

```asn1
id-cnb-notary-substitute-cert-policy OBJECT IDENTIFIER ::= { id-cnb-cert-policies 3 }
```