Query detailed geolocation and network information for IP addresses
Features
- Multi-API Polling Mechanism: Integrates multiple free IP lookup APIs with automatic failover to ensure query success rate and stability
- Detailed Geolocation Information: Provides complete geolocation data including country, region, city, postal code, timezone, currency, etc.
- Network Information Query: Displays ISP, ASN, organization and other network provider information to help understand IP address network ownership
- Map Visualization: Displays the approximate location of the IP address on a map for intuitive geolocation visualization
Usage Guide
- Enter IP Address: Enter the IPv4 or IPv6 address you want to query in the input box, supporting various formats (e.g., 8.8.8.8 or 2001:db8::1)
- Execute Query: Click the 'Lookup' button or press Enter, the system will automatically call multiple API providers to ensure high availability
- View Results: View detailed geolocation information (country, region, city, coordinates), network information (ISP, ASN, organization) and map display
- Copy Information: Click the copy button to quickly copy the IP address or other information for later use
Technical Details
IP Geolocation Principles
IP geolocation is a technology that determines the geographical location of an IP address by analyzing IP address allocation records and routing information. IP addresses are allocated by IANA (Internet Assigned Numbers Authority) to Regional Internet Registries (RIRs), which then assign them to ISPs. Geolocation databases establish mapping relationships between IP address ranges and geographical locations by collecting allocation records, BGP routing tables, Whois data, and other information. Location accuracy depends on the granularity of IP address ranges, typically accurate to city or regional level, rather than precise physical addresses.
Multi-API Polling and Failover Mechanism
This tool implements a polling mechanism for multiple API providers, attempting different IP lookup services in priority order. When an API fails, times out, or exceeds limits, it automatically switches to a backup API. This design improves service availability and reliability, avoiding single points of failure. Each API request has a timeout mechanism to ensure fast response. localStorage is used to cache query results for 24 hours, reducing API calls, improving response speed, and lowering API usage costs.
IPv4 and IPv6 Address Format Validation
The tool implements complete IP address format validation, supporting both IPv4 and IPv6 protocols. IPv4 addresses are 32-bit numbers, typically represented as four decimal numbers between 0-255, separated by dots (e.g., 192.168.1.1). IPv6 addresses are 128-bit numbers, represented as 8 groups of 4-digit hexadecimal numbers, separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334), supporting compressed format (e.g., 2001:db8::1). The validation algorithm checks address format correctness, ensuring only valid IP addresses are queried.
Frequently Asked Questions
- How accurate is IP address lookup?
- IP address lookup accuracy depends on several factors: 1) The granularity of IP address ranges, typically accurate to city or regional level, rather than precise physical addresses; 2) ISP routing configuration and network infrastructure; 3) Database update frequency. For most public IP addresses, location accuracy can reach city level, but actual locations may vary due to network routing. IP addresses for mobile network and VPN users may show ISP data center locations.
- Why can't private IP addresses be queried for location?
- Private IP addresses (such as 192.168.x.x, 10.x.x.x, 172.16.x.x) are used for local area networks and are not routed on the Internet, so they have no corresponding geolocation information. These addresses are defined by RFC 1918 for local network communication. Only public IP addresses (assigned by ISPs and routed on the Internet) can be queried for geolocation information.
- What's the difference between IPv6 and IPv4 address queries?
- The basic principles of IPv6 address queries are the same as IPv4, both determining geographical locations through IP address range allocation records. However, due to the larger IPv6 address space (128 bits vs 32 bits), address allocation is more dispersed, and some IPv6 address ranges may not have complete geolocation data. IPv6 location accuracy may be slightly lower than IPv4, but this is improving as IPv6 becomes more popular and databases are updated.
- What is the use of ASN information in query results?
- ASN (Autonomous System Number) information helps understand IP address network ownership: 1) Identify ISP providers and understand network service providers; 2) Determine whether IP addresses belong to data centers, enterprise networks, or home networks; 3) Used for network management and security auditing to identify abnormal traffic sources; 4) Analyze network topology and routing paths. ASN information is very useful for network administrators and security analysts.
Related Documentation
- RFC 791 - Internet Protocol - Official standard document for IPv4 protocol, defining IP address structure and allocation rules
- RFC 2460 - Internet Protocol Version 6 - Official standard document for IPv6 protocol, defining IPv6 address format and allocation mechanism
- IANA - IP Address Space - IANA IP address space allocation records, containing allocation information for all IP address ranges
- MaxMind GeoIP2 Database Documentation - MaxMind GeoIP2 database technical documentation, introducing IP geolocation principles and implementation