Utilix
Developer Tools

IP Address Info

Look up geolocation, ISP, ASN, and reverse DNS for any IPv4 or IPv6 address — or any domain.

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About IP Address Info

IP Address Info takes an IP address or a domain and returns the network and geographic context for the address: city, region, country, latitude/longitude, timezone, ISP, organization, autonomous system number (ASN), and the reverse DNS (PTR) records that point back at the IP. Pass a domain instead of an IP and the tool resolves it first, so you can ask "where is example.com hosted?" without manually looking up the A record. Reverse DNS comes from the operating system's DNS resolver. Geolocation comes from a free tier of ip-api.com, which is sufficient for "what country is this in" but not for street-level accuracy — IP geolocation in general is a best-effort signal, not a precise position. Common use cases: identifying which CDN edge a user hit; investigating suspicious traffic in a log file; checking whether an IP belongs to a known cloud provider; finding the ASN to feed into an abuse report; getting the timezone for a remote server before scheduling a job.

How IP Address Info works

  1. Paste an IPv4 address (1.1.1.1), an IPv6 address (2606:4700:4700::1111), or a domain (example.com).
  2. If you pass a domain, we resolve it to an A record first; if no A, we try AAAA.
  3. Reverse DNS (PTR) is queried from the system resolver.
  4. Geolocation, ISP, ASN, and organization are fetched from ip-api.com's free tier.
  5. Private and loopback addresses are blocked.

When to use IP Address Info

  • Check what country a user's IP is in when reviewing access logs.
  • Identify the cloud provider behind an IP from the ASN and organization.
  • Find the timezone of a remote server before scheduling work.
  • Confirm a CDN is serving from the edge POP closest to your test location.
  • Get reverse DNS to identify a mail server from a Received header.
  • Investigate suspicious traffic by looking up the source IP's geolocation and ASN.

Why choose Utilix IP Address Info

  • Accepts both IPs and domains — no manual A-record lookup step.
  • Returns geolocation, ASN, ISP, and reverse DNS in one shot.
  • Free, no signup, no API key required from you.
  • Works for both IPv4 and IPv6.

Frequently asked questions