Hostname To IP

Introduction

Hostname To IP converts a domain name or hostname into its numeric IP addresses (A for IPv4 and AAAA for IPv6). It’s useful for developers, system administrators, and site owners who need the underlying IPs for troubleshooting, firewall allowlists, diagnostics, or to verify DNS changes—without using the command line.

What is this tool?

A hostname (like example.com) is a human-friendly label that DNS maps to one or more IP addresses. This tool performs DNS A/AAAA lookups against public resolvers and displays any IPs returned along with their record type and TTL when available. Many hostnames return multiple IPs (load balancing, CDNs) or CNAME chains—this tool shows the resolved endpoints so you can act on them.

Why use this tool?

- Firewall and allowlist setup: Get the exact IPs to add to allowlists or security groups.  
- Troubleshooting: Confirm the host resolves to the expected IP during outages or routing problems.  
- DNS propagation checks: Verify new A/AAAA records have propagated or spot stale values.  
- CDN/proxy detection: Multiple or regional IPs can indicate a CDN or anycast setup—helpful for performance and debugging.  
- Diagnostics & logging: Resolve hostnames referenced in logs to IPs for deeper investigation.

How to use it

1) Enter a hostname or domain (e.g., example.com or api.example.com).  
2) Click “Resolve” or “Lookup.”  
3) Review returned records: A (IPv4), AAAA (IPv6), and any CNAMEs shown. Note the TTL if provided.  
4) If results don’t match expected values, check your authoritative DNS records, flush DNS cache, or retry from another network.  
5) Use the IP(s) for firewall rules, ping/traceroute, or further inspection (ASN/geo lookup).

Example

Input: example.com  
Output:  
- A: 93.184.216.34 (TTL: 3600)  
- AAAA: 2606:2800:220:1:248:1893:25c8:1946 (if present)  
Interpretation: The domain resolves to the shown IPv4 and IPv6 addresses. Multiple A/AAAA entries may be returned for redundancy or load balancing.

FAQ

Do you store the hostnames or IPs I check?  

No—lookups are performed live and are not retained.

Why do I get different IPs than my machine?  

DNS results can vary by resolver, DNS cache, geographic routing, or split-horizon DNS. Try flushing your DNS cache, testing from another network, or querying the authoritative nameserver.

Why are there multiple IPs?  

Multiple IPs often indicate load balancing, failover, or CDN anycast. Clients receive different IPs based on DNS policies and routing.

What is a CNAME and why does it matter?  

A CNAME is an alias pointing to another hostname. The tool will show CNAME chains so you can see the final A/AAAA records the alias resolves to.

What if the hostname doesn’t resolve?  

Check for typos, ensure the domain has A/AAAA records configured at the authoritative DNS, and verify DNS propagation/TTL. If needed, contact your DNS host or registrar.