---
title: Set Ipv4
url: https://docs.vultr.com/reference/vultr-cli/instance/reverse-dns/set-ipv4
description: Configure reverse DNS (PTR record) for an IPv4 address on a Vultr instance to enable proper reverse IP lookups.
publish_date: 2025-09-14T03:06:43.125748Z
last_updated: 2025-11-07T17:47:35.597675Z
---

The `vultr-cli instance reverse-dns set-ipv4` command configures reverse DNS (PTR record) for an IPv4 address on a Vultr instance, enabling reverse hostname lookups for that IP.

## Usage

```console
$ vultr-cli instance reverse-dns set-ipv4 <Instance ID> <IPv4 Address> [flags]
```

## Flags
| Shorthand | Long Version | Description |
|-----------|--------------|-------------|
| -e | --entry | reverse dns entry |