BulkGeoIP is a free collection of browser-based tools for IP geolocation, server-log analysis, WHOIS research, ASN discovery, BGP prefix inspection, and subnet calculation. It is designed for system administrators, security analysts, developers, abuse teams, researchers, and anyone who needs to turn raw IP addresses into understandable network context.
Why the service exists
Most IP lookup interfaces are optimized for one address at a time. Real operational work usually starts with a log, alert export, firewall report, or spreadsheet containing many addresses. BulkGeoIP focuses on that workflow: extract addresses from surrounding text, analyze up to 1,000 unique IPv4 and IPv6 addresses, explore patterns, and export reusable results.
Our operating principles
- Useful without signup: core web tools are available without an account.
- Honest about uncertainty: GeoIP is an estimate, especially at city level.
- Privacy-conscious: selected files are read in the browser and submitted lookup addresses are not stored as a result database.
- Connected evidence: geolocation is presented alongside ASN, WHOIS, routing, reverse DNS, and reputation context.
- Accessible documentation: methods and limitations are explained in plain language.
Editorial responsibility
Documentation is maintained by the BulkGeoIP team and reviewed when tool behavior or underlying data flows change. Technical claims should be traceable to product behavior, public registry documentation, or clearly labeled estimates. Corrections can be reported through the contact page.
For details, read our data methodology, privacy policy, and public changelog.