IP Address Validator & Lookup - Free Online IPv4 & IPv6 Analysis
What is an IP Validator? An IP validator is a tool that verifies if a string follows the standard 32-bit (IPv4) or 128-bit (IPv6) format. Our tool provides instant validation, CIDR range checking, and network metadata (ASN, ISP, and Geolocation) to help developers and network engineers debug connectivity issues and audit security logs.
Comprehensive IPv4 & IPv6 Validation
In modern networking, ensuring your IP data is clean is critical for firewall configurations and application logic. This validator instantly identifies both IPv4 (e.g., 192.168.1.1) and IPv6 (e.g., 2001:db8::) addresses. It performs deep syntax checks to catch common configuration errors that basic regex might miss:
999.999.999.999- Detects octets out of the valid 0-255 range.192.168.1- Identifies incomplete or truncated IPv4 addresses.2001:xyz::1- Flags invalid hexadecimal characters in IPv6 strings.10.0.0.0/33- Validates CIDR prefixes (0-32 for IPv4, 0-128 for IPv6).
Automatic IP Type Classification
Not all IP addresses function the same way on the global web. Our tool classifies every entry into functional categories to help you identify internal vs. external traffic:
- Public: Globally routable addresses used across the internet.
- Private (RFC 1918): Reserved for local area networks (LANs) like
10.0.0.0/8or192.168.0.0/16. - Loopback: Special addresses (
127.0.0.1,::1) used to test local software services. - Link-Local: Non-routable addresses used for communication within a single network segment (APIPA).
- Multicast: Used for one-to-many communication protocols (
224.0.0.0range). - Unique Local (ULA): The IPv6 equivalent of a private network address (
fc00::/7).
Technical Representations (Binary, Hex, & Decimal)
For low-level debugging and firewall rule creation, seeing an IP in different formats is essential. We provide the mathematical breakdown of every IPv4 address:
- Decimal (Integer): Useful for database storage and sorting (e.g.,
8.8.8.8is134744072). - Binary: The raw 32-bit machine code format, displayed in clear 8-bit octets.
- Hexadecimal: The standard format for many networking logs and advanced routing protocols.
Advanced CIDR Notation Support
Classless Inter-Domain Routing (CIDR) is the industry standard for defining network boundaries. By inputting a CIDR block (e.g., 10.0.0.0/24), you can verify if the subnet mask is valid and see how many host addresses are contained within that specific network prefix.
Global Network Intel & Geolocation
For any public IP, the tool queries live network databases to provide real-world context:
- ASN & AS Name: Identify the Autonomous System (e.g., AS15169 for Google) and the organization owning the IP block.
- Country & Continent: Precisely locate the registration origin of the traffic.
- ISP Data: Understand which service provider is routing the traffic, helping identify VPNs or data centers.
Bulk IP Audit & CSV Export
Dealing with server logs? Switch to the Multiple IPs tab to validate up to 200 addresses simultaneously. This is the fastest way to audit a security export or clean a list of IPs before importing them into a Cloud Firewall or AWS Security Group.
Pro Tip: You can paste mixed lists containing both IPv4 and IPv6. The tool will automatically sort them and allow you to download the results as a clean CSV file.
Frequently Asked Questions (FAQ)
Is my IP address logged when I use this tool?
No. All format validation and IP conversions happen locally in your browser. Geolocation lookups for public IPs are performed server-side but we do not store or log your queries.
What is the difference between IPv4 and IPv6?
IPv4 uses 32-bit addresses (approx. 4.3 billion addresses), while IPv6 uses 128-bit addresses, providing a virtually infinite supply of IP addresses to support the growing Internet of Things (IoT).
Can this tool find a person's exact physical address?
No. IP geolocation provides the city or region and the ISP registration point. It cannot pinpoint a specific house or person for privacy and security reasons.