IP Address Info
Paste any IPv4 or IPv6 address to see its class, range, private or public status, expanded form, reverse DNS pointer, and alternative base representations. Runs entirely in your browser.
About IP Addresses
Inspects IPv4 and IPv6 addresses, showing class, range, private vs public, expanded form, reverse DNS, and alternative bases. For subnet math see theCIDR Calculator.
Secure & Private Client-Side
This tool runs entirely in your browser. No data is sent to any server, ensuring your information remains private and secure.
About IP Address Info
Paste any IPv4 or IPv6 address to see its class, range, private or public status, expanded form, reverse DNS pointer, and alternative base representations. Runs entirely in your browser.
Frequently Asked Questions
What is a private IP address? expand_more
Private IPv4 ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. They are not routable on the public internet and are used inside homes and offices.
What is reverse DNS? expand_more
Reverse DNS maps an IP back to a hostname using PTR records. For IPv4 it uses the in-addr.arpa zone, for IPv6 the ip6.arpa zone.
How is IPv6 expanded? expand_more
The tool expands the compressed form (with ::) to the full eight-group hexadecimal representation with leading zeros restored.
Need subnet math instead? expand_more
Use the [CIDR Calculator](/tools/cidr-calculator/) to compute network, broadcast, and host ranges for a block.
Is my IP uploaded? expand_more
No. All parsing happens locally in your browser.
Common Use Cases
- Log Analysis: Inspect IPs found in server or firewall logs.
- Networking Class: Learn IPv4 classes and private ranges.
- DNS Debugging: Compute the reverse DNS (PTR) for an IP.
- Security Triage: Tell public, loopback, and private addresses apart.