IP Address Lookup - Location & ISP Details
Look up IP address details: location, ISP, timezone, and organization. Includes subnet calculator and private IP checker. Free tool.
IP Utilities
IPv4 ↔ Decimal Converter
Subnet Calculator
Private IP Checker
About IP Address Lookup
Every device connected to the internet has an IP address. This tool looks up detailed information about any IP address including geographic location, ISP, organization, and timezone.
Uses the free ip-api.com service. Your current IP address is shown by default. Enter any public IP address to look up its details.
IP geolocation databases map IP address ranges to physical locations using data from regional internet registries (ARIN, RIPE, APNIC, LACNIC, AfriNIC). Country-level accuracy is typically 99%, but city-level accuracy ranges from 50-80% depending on the region and ISP. Mobile carriers and VPN services make geolocation particularly unreliable.
IPv4 addresses (like 192.168.1.1) use a 32-bit format providing about 4.3 billion unique addresses - a pool that is now exhausted. IPv6 addresses (like 2001:0db8::1) use 128 bits, providing 340 undecillion addresses. The transition to IPv6 is ongoing, with adoption varying by country. This tool supports both IPv4 and IPv6 lookups.
The subnet calculator included in this tool helps network administrators understand IP address allocation. Enter a CIDR notation (like 192.168.1.0/24) to see the network address, broadcast address, first and last usable host, subnet mask, and total number of hosts. The private IP checker identifies whether an address belongs to a reserved private range (10.x.x.x, 172.16-31.x.x, 192.168.x.x).
How the IP Address Lookup Works
- 01Enter an IP address or use your current public IP
- 02The tool queries geolocation databases for the IP's location data
- 03View the country, city, ISP, timezone, and approximate coordinates
- 04See the location plotted on an interactive map
Understanding IP Geolocation
IP geolocation is accurate to the country level in 99% of cases, but city-level accuracy drops to around 50-80% depending on the provider. VPNs, proxies, and mobile networks can make IP location data unreliable. IPv4 addresses (like 192.168.1.1) are being replaced by IPv6 (like 2001:db8::1) as the internet runs out of IPv4 space. Private IP ranges (10.x.x.x, 192.168.x.x) cannot be geolocated as they are internal network addresses.
When to Use the IP Address Lookup
Use this tool when you need to identify the geographic location of an IP address, when troubleshooting network connectivity issues, when investigating suspicious access in server logs, or when verifying that a VPN is masking your real location. Network administrators also use it for subnet calculations and IP range planning.
Common Use Cases
- Investigating suspicious login attempts by checking the geographic origin of IP addresses
- Verifying VPN connection by comparing your visible IP location with your actual location
- Planning network subnets using the built-in CIDR calculator
- Looking up ISP and organization information for abuse reporting
Expert Tips
- Use the subnet calculator to plan IP address allocation before configuring network equipment.
- Remember that IP geolocation shows where the IP is registered, not necessarily where the user is - VPNs, proxies, and mobile carriers affect accuracy.
- Check the private IP tool when troubleshooting to quickly identify whether an address is internal or routable on the internet.
Frequently Asked Questions
How accurate is IP geolocation?→
What is the difference between IPv4 and IPv6?→
Can I look up a private IP address?→
What is a subnet and CIDR notation?→
Related tools
12 suggested- 01HTML to Markdown Converter - Instant & FreeConvert HTML code to clean Markdown syntax. Handles headings, lists, links, tables, code blocks. Free browser-based converter.
- 02JSON to TypeScript - Interface GeneratorConvert JSON objects to TypeScript interfaces instantly. Supports nested objects, arrays, optional and readonly properties. Free online tool.
- 03PX to REM Converter - CSS Unit CalculatorConvert pixels to REM and REM to pixels with custom base font size. Quick reference table with visual preview. Free CSS unit converter.
- 04Image to Base64 Converter - Free Online EncoderConvert any image to Base64 string. Get raw Base64, Data URI, HTML img tag, or CSS background-image. Drag & drop supported.
- 05Fake Data Generator - Names, Emails, AddressesGenerate realistic fake data for testing: names, emails, addresses, phones, companies. Bulk generation up to 100 rows. Export as JSON or CSV. EN, NL, DE, FR locales.
- 06Binary Translator - Text to Binary & Binary to TextConvert text to binary and binary back to text. ASCII and UTF-8 support. Visual binary display with character breakdown table. Copy results instantly.
- 07JSON Path Finder - Interactive JSONPath ExplorerPaste JSON, click on any value to see its JSONPath expression. Interactive tree view, path copying, nested object and array support. Free developer tool.
- 08Email Validator - Syntax and Typo CheckValidate email address syntax, catch typos like gmial.com, and flag disposable addresses. Check one address or a whole list in your browser.
- 09TSV to CSV Converter - Free & PrivateConvert tab separated data to RFC 4180 CSV with proper quoting, a semicolon option for Excel and a UTF-8 BOM toggle. Free and fully browser based.
- 10CSV to Markdown Table Converter - Free & PrivateConvert CSV to a Markdown table with per column alignment and RFC 4180 quoted field support. Free, browser based, nothing is uploaded to a server.
- 11XML to JSON Converter - Free & PrivateConvert XML and SOAP responses to JSON in your browser. Configurable attribute prefix, namespace handling and arrays for repeated tags. Free and private.
- 12YAML to JSON Converter - Free & PrivateConvert YAML to JSON online. Nested maps, sequences, inline flow style, comments and block scalars, with line numbered errors. Free and browser based.
Link to this tool
Free to use, free to linkMentioning this tool in a README, a blog post or your team wiki? Paste one of these and your readers land straight on the tool, running in their own browser.
- HTML
<a href="https://toolforte.com/tools/ip-address-lookup">IP Address Lookup</a> - MD
[IP Address Lookup](https://toolforte.com/tools/ip-address-lookup)