---
title: "Reverse DNS Lookup - Free lookup | FirstSales"
description: "The Reverse DNS Lookup performs PTR record queries on IP addresses. Verify that your sending IP resolves correctly to your domain for optimal delivera"
canonical: "https://firstsales.io/tools/reverse-dns-lookup/"
---

100% Free • No SignupEmail Deliverability & Authenticationlookup

# Reverse DNS Lookup

Perform a reverse DNS (PTR) lookup on any IP to verify it resolves to your sending domain. Works instantly without signup.

Instant Results

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[Home](/)/[Tools](/tools/)/Reverse DNS Lookup

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Reverse DNS Lookup

Lookup IP Address

Enter a ip address to retrieve real DNS records from authoritative servers.

[Stop doing this by hand. FirstSales runs your email deliverability & authentication on autopilot, 24/7.Start your $1 trial](https://app.firstsales.io)

## Key Features

PTR record lookup

IP resolution

Reverse verification

Multiple IP support

Configuration check

## Use Cases

1

IP configuration

2

Deliverability troubleshooting

3

Mail server setup

4

Reverse verification

Tool Info

Typelookup

Free

Yes

Signup

Not Required

Related Tools

[SPF Record CheckerValidate your domain's SPF record and identify misconfigurations that block email delivery](/tools/spf-record-checker/)[DKIM Record CheckerVerify your DKIM DNS record is correctly published and properly signing outgoing emails](/tools/dkim-record-checker/)[DMARC Record CheckerAnalyze your DMARC policy to ensure email authentication alignment and reporting is active](/tools/dmarc-record-checker/)[Email Authentication AnalyzerRun a full SPF + DKIM + DMARC audit on any domain and get a pass/fail scorecard](/tools/email-authentication-analyzer/)[Sender Score LookupCheck your email sending IP's sender score (0-100) and compare against industry benchmarks](/tools/sender-score-lookup/)[MX Record LookupLook up MX records for any domain to verify mail server configuration and priority settings](/tools/mx-record-lookup/)

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## About Reverse DNS Lookup

The Reverse DNS Lookup performs PTR record queries on IP addresses. Verify that your sending IP resolves correctly to your domain for optimal deliverability.

## Automate Your Email Deliverability & Authentication

This free tool is great for quick checks. FirstSales automates your entire email deliverability & authentication workflow with AI-powered personalization and 87% inbox placement.

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## FAQs

Your questions answered

Can't find what you're looking for? Contact our [customer support team](mailto:support@firstsales.io)

### General

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### Deliverability

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Can't find what you're looking for? Contact our [customer support team](mailto:support@firstsales.io)