IP Address Info
View your current IP address, validate IPv4/IPv6 addresses, detect IP classes, and calculate CIDR notation. Free online IP information tool.
Why Use an IP Address Info Tool?
Whether you're troubleshooting network issues, configuring firewalls, or learning about IP addressing, our IP Address Info tool provides everything you need. Check your public IP, validate addresses, determine IP classes, and calculate CIDR subnet information — all in one place, right in your browser.
Key Features
- Display your current public IP address
- Validate IPv4 and IPv6 addresses
- Detect IP class (A, B, C, D, E) for IPv4
- Identify private vs public IP addresses
- CIDR notation calculator with network and broadcast addresses
How It Works
- Your public IP is automatically detected via ipify API
- Enter any IP address to validate and analyze it
- Set the CIDR prefix length for subnet calculations
- View network address, broadcast, and host range
Technical Details
Public IP detection uses the free ipify.org API, which returns your public IP in JSON format. All validation and CIDR calculations are performed client-side using bitwise operations on parsed IP addresses. The tool uses standard IPv4/IPv6 regex patterns for validation.
Frequently Asked Questions
What is an IP class?
IP classes are a historical way of categorizing IPv4 addresses. Class A (1-126) supports large networks, Class B (128-191) medium networks, Class C (192-223) small networks, Class D (224-239) is for multicast, and Class E (240-255) is reserved.
What is CIDR notation?
CIDR (Classless Inter-Domain Routing) notation combines an IP address with a prefix length, like 192.168.1.0/24. The /24 means the first 24 bits are the network portion, leaving 8 bits for hosts (254 usable addresses).
Is my IP address private?
Private IP ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. These are not routable on the public internet and are used within local networks.
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