Nameserver Lookup: Check NS and A/AAAA Address Records
Nameserver Lookup checks the NS (nameserver) records for a hostname, then looks up the A and AAAA addresses for each nameserver. It uses DNS-over-HTTPS, with your hostname or IP address sent from the browser to a public resolver. Enter your input, adjust the available options, and review or copy the result.
Nameserver Lookup is a browser-based tool for checking NS records for a hostname. It also resolves each nameserver to its A and AAAA addresses, giving developers and DevOps engineers a convenient way to review nameserver information alongside the associated IPv4 and IPv6 addresses. The lookup uses DNS-over-HTTPS.
To use it, enter a hostname or IP address, adjust the available options, and run the lookup. The tool checks NS (nameserver) records and then looks up A and AAAA records for each nameserver. The input does not describe specific option names or how they change the lookup, so check the controls presented in the tool before using them.
DNS records serve different purposes: NS records identify nameservers for a domain, while A and AAAA records associate names with IPv4 and IPv6 addresses. Looking up both kinds of information can help when you need to inspect nameserver details or troubleshoot DNS. This is a lookup tool, not a conversion between file formats.
The lookup runs in your browser, but it is not an offline or no-data-leaves-your-browser tool. To get an answer, it sends the hostname or IP address you enter to a public DNS-over-HTTPS resolver. My-DevTools itself stores nothing, but the query does leave your browser, and a network connection is required.
Nameserver Lookup can help developers, DevOps engineers, and anyone who needs to check NS records without installing a command-line client. It is useful for a quick browser-based lookup on the machine you are already using, while keeping in mind that the query is sent to a public resolver.
Step 1: Enter the hostname you want to check. The lookup checks its NS (nameserver) records.
Step 2: Adjust the available options before running the lookup. The input does not specify what those options control.
Step 3: Run the lookup and review the results. Each nameserver is also resolved to its A and AAAA addresses.
Step 4: Copy the result for use in your notes or DNS troubleshooting workflow.
Use case: Check a hostname's NS records during a routine DNS investigation without installing a local tool.
Use case: Look up nameserver records from a browser on a machine where you cannot or do not want to install a command-line client.
Use case: Resolve each listed nameserver to its A and AAAA addresses when checking which IP addresses are associated with it.
Use case: Review nameserver information while troubleshooting a hostname's DNS configuration.
Use case: Run a quick lookup from a different workstation or browser when you need to check DNS records away from your usual environment.
Use case: Use DNS-over-HTTPS from the browser to query a public resolver instead of setting up a separate resolver client.