IP Validator
Free online IP address validator. Check IPv4 and IPv6 addresses instantly, identify private/public ranges, view CIDR notation and network details.
What is an IP address validator?
An IP address validator is a tool that checks if an IP address follows the correct format for IPv4 or IPv6. It verifies the syntax, identifies the address type, and provides network information.
What is the difference between IPv4 and IPv6?
IPv4 uses 32-bit addresses (e.g., 192.168.1.1) allowing about 4.3 billion addresses. IPv6 uses 128-bit addresses (e.g., 2001:db8::1) providing virtually unlimited addresses.
What is a private IP address?
Private IP addresses are used within local networks and are not routable on the internet. IPv4 private ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16.
What is CIDR notation?
CIDR (Classless Inter-Domain Routing) notation specifies an IP address and its routing prefix. For example, 192.168.1.0/24 means the first 24 bits are the network prefix.
How does this IP validator work?
This tool validates IP addresses entirely in your browser using JavaScript. No data is sent to any server, ensuring complete privacy and instant results.
What is a subnet mask?
A subnet mask is a 32-bit number that divides an IP address into network and host portions. It determines which part of the address identifies the network versus the device.
What are the IP address classes?
Class A (1.0.0.0-126.255.255.255), Class B (128.0.0.0-191.255.255.255), Class C (192.0.0.0-223.255.255.255), Class D (multicast), Class E (experimental).
Is my IP address data sent to a server?
No, all validation is performed locally in your browser. Your IP addresses and network information never leave your device.
Can I validate multiple IP addresses at once?
Yes, you can enter multiple IP addresses separated by line breaks or commas to validate them all at once.
What is a loopback address?
A loopback address (127.0.0.1 for IPv4, ::1 for IPv6) is used by a device to send traffic to itself for testing and diagnostics.
What is the difference between public and private IP ranges?
Public IPs are globally routable on the internet. Private IPs are reserved for local networks and cannot be accessed directly from the internet.
Why do I need to validate IP addresses?
IP validation ensures addresses are correctly formatted before use in network configurations, firewall rules, application settings, and system administration tasks.
How to Use IP Validator
Validate IPv4 and IPv6 addresses instantly in your browser. Check whether an address is well-formed, private or public — no data ever leaves your device.
- Stay on the Single IP tab for one address at a time.
- Type an address into the input that shows e.g. 8.8.8.8 — validation runs as you type.
- See whether it is a valid IPv4 or IPv6 address and if it falls in a private or public range.
- Review the CIDR notation and network details shown for a valid address.
- Switch to the Batch tab to paste a whole list and validate every line at once.
Private ranges like 10.x.x.x or 192.168.x.x are LAN-only, so they will be labeled private rather than public.
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