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Reverse IP lookup

Resolve an IP address to find the corresponding PTR hostname or domain.

DNS PTR Record Résolution IP vers Hôte Vérification d'Origine

Reverse DNS (PTR) & Hostname Resolution Guide

Learn how PTR records validate mail servers, prevent spam classification, and aid network diagnostics.

Reverse DNS (rDNS) queries map numerical IP addresses back to canonical hostnames using PTR records. Valid PTR records are critical for email deliverability with Gmail, Yahoo, and Outlook.

Questions Fréquemment Posées (FAQ)

Tout ce que vous devez savoir pour exploiter au mieux cet outil.

Reverse DNS maps a numerical IP address back to its associated hostname or domain via PTR records.

Valid PTR records are crucial for email server deliverability (preventing spam filtering) and network diagnostics.

Standard PTR configuration designates one primary canonical hostname per IP address.

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