Domain to IP Lookup

Convert domain names to IPv4 and IPv6 addresses using Google DNS

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Domain to IP Address Converter - Free Online DNS Lookup Tool (IPv4 & IPv6)

Instantly convert any domain name to its IP address with our free online Domain to IP lookup tool. Get both IPv4 (A record) and IPv6 (AAAA record) addresses in seconds using Google's reliable public DNS infrastructure. Supports single domain lookups and bulk domain resolution (up to 10 domains simultaneously). Perfect for network engineers, web developers, IT administrators, and anyone troubleshooting connectivity or hosting issues.

What is a Domain to IP Converter?

A Domain to IP converter (also called a domain to IP lookup tool, DNS resolver, or hostname to IP lookup) is an online utility that performs DNS resolution - the process of translating a human-readable domain name into the machine-readable IP address where the website or service is hosted.

The internet's addressing system uses numerical IP addresses to route traffic between computers. Every website, API, mail server, and internet-connected service has an IP address. Domain names like "example.com" are simply user-friendly aliases that map to these IP addresses through the Domain Name System (DNS). When you type a domain into your browser, your computer secretly performs this conversion dozens of times per second - for the main domain, subdomains, CDN assets, APIs, and more.

Our tool makes this process explicit and controllable, letting you see exactly which IP addresses a domain resolves to, query both IPv4 and IPv6 addresses simultaneously, and check up to 10 domains in a single bulk lookup operation - all powered by Google's public DNS API for maximum accuracy.

IPv4 vs IPv6: What's the Difference?

IPv4 Addresses (A Records)

IPv4 (Internet Protocol version 4) is the original IP addressing system, using 32-bit addresses written in four groups of numbers separated by dots, like 142.250.80.46. The IPv4 address space has approximately 4.3 billion unique addresses.

With the explosive growth of the internet and IoT devices, IPv4 addresses are now nearly exhausted. Most websites today have at least one IPv4 address for backwards compatibility with older systems and ISPs that don't yet support IPv6.

A domain can have multiple IPv4 addresses configured (round-robin DNS for load balancing), which is why our tool shows all IP addresses, not just one.

IPv6 Addresses (AAAA Records)

IPv6 (Internet Protocol version 6) is the next-generation addressing system using 128-bit addresses written as eight groups of hexadecimal numbers, like 2607:f8b0:4004:c08::65. The IPv6 address space has 340 undecillion unique addresses - effectively unlimited.

Major internet providers, mobile networks, and cloud platforms have rapidly adopted IPv6. Google reports that over 45% of its traffic globally is now served over IPv6. If your server has an IPv6 address (AAAA record), IPv6-capable users may preferentially connect via IPv6.

Not all domains have IPv6 addresses yet. When our tool returns no IPv6 address, it means the domain hasn't configured an AAAA record - not that the site is unreachable.

How DNS Resolution Works: The Complete Process

When you enter a domain into your browser or our tool, here's the DNS resolution process that happens behind the scenes:

1
Browser Cache Check
Your browser first checks its local DNS cache. If it recently resolved this domain, it uses the cached IP address and skips all subsequent steps. This is why DNS changes can take time to appear even after propagation.
2
Operating System Cache
If not in the browser cache, your OS checks its DNS resolver cache (the hosts file and system DNS cache). On Windows, you can view this with ipconfig /displaydns.
3
Recursive Resolver Query
Your device queries a recursive DNS resolver - usually your ISP's DNS server, or a public DNS like Google (8.8.8.8) or Cloudflare (1.1.1.1). Our tool uses Google's dns.google API, which acts as this recursive resolver.
4
Root Name Server
If the resolver doesn't have the answer cached, it queries one of the 13 root name server clusters that know which TLD name servers are authoritative for .com, .org, .net, etc.
5
TLD Name Server
The root server directs the query to the appropriate TLD name server (e.g., Verisign's servers for .com domains), which knows which authoritative name servers handle the specific domain.
6
Authoritative Name Server
The query reaches your domain's authoritative name servers (configured by your DNS provider - Cloudflare, AWS Route 53, GoDaddy, etc.), which return the actual DNS records including A and AAAA records with the IP address.
7
Response & Caching
The IP address is returned to your browser, which caches it for the duration specified by the record's TTL. Your browser then connects to the server at that IP address.

Who Uses Domain to IP Lookup Tools?

Network Engineers & IT Administrators

Quickly look up IP addresses to configure firewall rules, whitelist specific IPs, set up VPN exceptions, troubleshoot routing issues, and verify that hosting changes have propagated correctly. Bulk lookup is especially useful for whitelisting multiple domains at once.

Web Developers & DevOps Engineers

Check which IP addresses a domain resolves to during hosting migrations, CDN configurations, and Kubernetes ingress setup. Verify that load balancers are distributing traffic correctly by checking multiple IP addresses returned for a single domain.

Cybersecurity Researchers

Identify the hosting infrastructure behind suspicious domains, map attack surfaces, correlate domains using the same IP infrastructure, and investigate phishing campaigns. Domain-to-IP lookup is a fundamental OSINT (Open Source Intelligence) technique.

SEO Professionals

Verify website hosting during site migrations, check if multiple domains owned by a client are on the same server IP (which could affect link equity in some scenarios), and troubleshoot indexing issues caused by server IP changes.

Email Deliverability Specialists

Look up the IP address of a mail server to cross-reference with blacklists, verify that MX record IPs have PTR records configured, and confirm that email is routing through the expected server infrastructure.

General Users

Satisfy curiosity about where a website is hosted, check if two websites are on the same server, or troubleshoot connectivity issues by confirming that a domain resolves to the expected IP address.

Why a Domain May Return Multiple IP Addresses

It's common for our tool to return multiple IP addresses for a single domain. This happens for several reasons:

  • Round-Robin DNS Load Balancing: The domain is configured with multiple A records, each pointing to a different server. DNS returns all IPs in rotating order to distribute traffic across servers. Google.com, for example, returns several IP addresses.
  • Anycast Routing: CDN providers like Cloudflare use anycast, where the same IP address is announced from multiple data centers worldwide. What looks like one IP may actually route to the nearest CDN node based on geography.
  • Dual-Stack IPv4/IPv6: When we return both IPv4 and IPv6 addresses, it means the domain supports both protocols. Modern operating systems and browsers prefer IPv6 when available.
  • Geographic Load Balancing: Some DNS services return different IPs based on the querying location. Since our tool uses Google's DNS in the US, results may differ from what users in other regions see.

Frequently Asked Questions: Domain to IP Lookup

Why does the IP address change when I look up the same domain multiple times?

If a domain uses round-robin DNS or GeoDNS, different IP addresses may be returned on successive queries to distribute traffic. CDNs like Cloudflare use anycast routing, meaning the "same" IP address routes to different physical servers based on your network location. This is by design and indicates a properly configured, scalable hosting setup.

Can I find out who owns or where an IP address is hosted?

After getting the IP address from our Domain to IP tool, you can use an IP geolocation or WHOIS lookup tool to find out which country, region, and ISP the IP belongs to, and which organization has been allocated that IP block. This is done through ARIN (Americas), RIPE (Europe), APNIC (Asia-Pacific), and other Regional Internet Registries.

What does 'No DNS records found' mean?

This typically means the domain does not exist, is not configured with A or AAAA records, or the domain is expired and has been removed from the DNS system. It could also occur if you made a typo in the domain name. Double-check the spelling and try again.

Is looking up someone else's domain IP address legal?

Yes. DNS is a public system by design. Every internet-connected computer performs IP address lookups constantly just to function normally. Querying DNS records for any domain is entirely legal, publicly accessible, and is a standard practice for system administrators, security researchers, and developers.

Why are IPv4 and IPv6 addresses shown separately?

IPv4 (A records) and IPv6 (AAAA records) are separate record types in the DNS system, and a server must be explicitly configured to support both. We show them separately so you can clearly see which protocols are supported and confirm both versions are configured correctly for dual-stack deployments.