CERT lookup

Find all cryptographic certificates for a domain name with this online DNS CERT checker. For example, try netflix.net or bing.com to view their CERT records.

How to lookup CERT records

Jump to

CERT records can be configured by the owner of a domain name. They are used to store information in the DNS, which can be looked up by anyone. Each record type has a different purpose.

CERT records are configured in DNS. But how can you look up these CERT records? That depends on the operating system you are using. Windows, Linux and Mac all have a different way of finding CERT records. The sections below contain instructions for each operating system.

Example output of a CERT lookup query

How to lookup CERT records on Windows

The CERT record type cannot be looked up in Windows. Neither nslookup, nor Powershell's Resolve-DnsName has support for it. You can either install WSL and follow the Linux instructions below, or use an online CERT lookup tool like the one on the top of this page.

How to lookup CERT records on Mac OS

To check the CERT records for a certain domain name on a Mac, follow these steps:

  1. Open a terminal by entering [command] + [space] → 'terminal.app' → [enter].Open a terminal on a Mac
  2. Type dig example.com CERT and hit [enter] to get the CERT records for example.com.CERT lookup on a Mac
  3. The CERT records are listed below the ANSWER SECTION heading.

How to lookup CERT records on Linux

To check the CERT records for a certain domain name on Linux, follow these steps:

  1. Open a terminal by entering [Super] → 'terminal' → [enter].Open a terminal in Linux
  2. Type dig example.com CERT and hit [enter] to get the CERT records for example.com.CERT lookup in Linux
  3. The CERT records are listed below the ANSWER SECTION heading.

How to lookup other record types

There are other types of DNS records then just CERT. The most commonly used DNS record types are A, AAAA, CNAME, NS, TXT, MX and SOA. If you'd like to look up all records of these record types, you can do so with nslookup. Click any of the record types below to find DNS records for that specific record type.