IPv4 Tools

Check your IPv4 address, hostname, location, ISP, ASN and proxy status. Every result is detected live from your connection.

  • Your IP address

    216.73.216.105

    The public IPv4 address websites see when you connect, assigned to your connection by your internet service provider.

  • Your Hostname

    Detecting…

    The reverse DNS name assigned to your IPv4 address, usually set by your ISP and often showing its name and region.

  • Your IP Location

    Columbus, United States

    The approximate location that geolocation databases link to your IPv4 address, based on where your ISP uses it.

  • Your proxy

    Not detected

    Whether your IPv4 connection shows signs of passing through a proxy server on its way to the websites you visit.

  • VPN check

    Likely VPN or proxy · Anthropic, PBC (AS16509)

    Whether the network you connect from looks like a VPN, proxy, relay or Tor exit rather than a home or mobile connection.

  • Your ISP

    Anthropic, PBC

    The organization your IPv4 address is registered to: normally your internet service provider or mobile carrier.

  • Your ASN

    AS16509

    The autonomous system number of the network that announces your IPv4 address to the rest of the internet.

These tools look up everything your IPv4 address tells the websites you visit. Each one runs over an IPv4-only connection, so you get IPv4 results even if your network also supports IPv6.

What is IPv4?

IPv4 (Internet Protocol version 4) is the original addressing system of the internet, in use since 1983. An IPv4 address is a 32-bit number written as four values from 0 to 255 separated by dots, for example 203.0.113.42. That allows about 4.3 billion addresses, far fewer than the number of devices online today.

The regional internet registries ran out of new IPv4 addresses during the 2010s. ISPs now stretch the remaining supply by sharing one public address between many customers (carrier-grade NAT), while the long-term fix is IPv6.

Which tool do I need?

  • IPv4 address: the public address websites see. Use it for remote access, game servers, firewall allow-lists or support requests.
  • Hostname: the reverse DNS name of your IP, often revealing your ISP and region.
  • IP location: the approximate country and city that geolocation databases link to your IP.
  • Proxy: whether your connection appears to pass through a proxy server.
  • ISP: the organization your IP address is registered to.
  • ASN: the autonomous system number of the network that routes your traffic.