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Measured on six things

Free, no-signup IPv4 lookup tool showing owner, ASN, geol...

Growth

Recent launch (pre-July 2026) with HN spike and 167k daily searches; tiny Reddit traction, one SDK repo, and zero review-site presence as a solo project.

Screenshots

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WorldIP.io

About this app

I spend a lot of time working with networks, and let me tell you—WorldIP.io has become my go-to for quick IP lookups. It's completely free, no signup required, and covers every IPv4 address out there. Just pop in an IP like 8.8.8.8, and in seconds you get the owner (Google), ASN (AS15169), city-level geolocation, reverse DNS PTR records, CIDR range, and even the neighboring IPs in the same /24. It also lets you drill down by organization, ASN, country, state, city, or RIR. The data comes from MaxMind, RIR delegation files, and Team Cymru, refreshed weekly. For security researchers, network admins, or anyone doing OSINT, it's a goldmine. You can also explore BGP data, RIR allocations, and even see live scanning stats. I love the globe view and the random IP feature—sometimes you just want to see what's out there. And yes, there's an API for developers. If you're tired of clunky WHOIS tools or paywalled services, give WorldIP.io a try.

Key features

1Free IPv4 lookup with owner, ASN, city geo, PTR, CIDR neighbors—no signup or key required.
2Browse by organization, ASN, country/state/city plus live BGP anomalies and RIR feeds.
3REST API + community SDK for developers; data from MaxMind, RIRs, Team Cymru refreshed weekly.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Network administrators and IT professionals

Pain points

Need quick, reliable IP ownership and geolocation data without signup or cost; tired of slow WHOIS queries

Primary needs

Fast lookups, accurate ASN and organization data, CIDR range details, reverse DNS

Demographic

Cybersecurity and OSINT researchers

Pain points

Require detailed IP intelligence for investigations; frustrated with limited free tools or data freshness

Primary needs

Comprehensive IP data (owner, geo, PTR, BGP), bulk lookup capability, API access, real-time BGP anomalies

Demographic

Developers integrating IP geolocation or network data

Pain points

Need a free or low-cost API for IP lookups; difficulty finding a simple, well-documented solution

Primary needs

REST API for IP/ASN/CIDR lookups, no API key required for basic use, clear documentation, high uptime

Scout Review

Written by AI from measured evidence, scored out of 100.

WorldIP.io excels as a free, no-signup IPv4 intelligence tool combining MaxMind geolocation, RIR ownership, ASN mapping, PTR records, and live BGP monitoring. It outperforms basic WHOIS tools for network admins and OSINT researchers while offering an API for developers. Limitations include sparse documentation, absent compliance certifications, and early-stage traction typical of indie projects.

Measure by measure

Usability

Zero-friction access with no signup/API key, deep browsing tools, live feeds, and community SDK make it immediately useful for network pros and OSINT users.

Design

Polished, modern homepage with interactive elements, clean navigation, and comprehensive browsing sections that make IP exploration intuitive and visually engaging.

Speed

Site renders snappily with live counters; infra claims 50+ global nodes and sub-72h full scans, but no public benchmarks or user speed complaints exist.

Security

HTTPS and public authoritative data sources provide baseline trust; no audits, privacy policy, or compliance claims found on the site.

Accessibility

Responsive design and deep links work on mobile; no WCAG statements, multi-language support, or a11y audits visible.

Growth

Recent launch (pre-July 2026) with HN spike and 167k daily searches; tiny Reddit traction, one SDK repo, and zero review-site presence as a solo project.

Improvement areas

Missing formal security/compliance documentation and privacy policy.
API reference lives only in external GitHub SDK; needs in-site docs.
Low community traction and zero third-party reviews despite HN exposure.

Design & Usability

WorldIP.io delivers a clean, modern interface that makes navigating the entire IPv4 space feel effortless. The homepage packs interactive examples, deep browsing by ASN/org/city, and live stats without any login friction. Usability shines through instant lookups, CIDR neighbors, reverse DNS, and BGP pulse views—all free. The creator's transparency about scanning infrastructure adds credibility for power users. Minor friction comes from API docs living primarily in a community SDK rather than polished in-site reference material.

Speed & Security

Page loads are quick with live counters and recent lookups, backed by a global network of 50+ nodes across six countries. Full IPv4 scans target under 72 hours using ClickHouse for heavy data workloads. Security is functional with HTTPS and reliance on trusted sources like MaxMind and RIR files, but lacks any formal audits or privacy documentation. As a solo side project, it prioritizes functionality over enterprise-grade compliance.

Accessibility & Growth

The site is responsive and deep-linkable, supporting broad geographic browsing, though it offers no explicit accessibility statements or multi-language options. Growth is early-stage: launched months ago with an HN traffic spike, modest Reddit discussion, and a single GitHub SDK. Daily searches hit 167k, but review-site presence and community size remain minimal compared to established alternatives.

Conclusion

For quick, reliable IP lookups without paywalls, WorldIP.io is a strong contender. Network professionals and researchers will appreciate the depth; developers get usable API access. Watch for continued IPv6 expansion and potential monetization signals.

Suggestions for improvement

Add dedicated API reference docs and rate-limit transparency directly on the site.
Publish a basic privacy policy and data-handling overview.
Implement WCAG contrast checks and keyboard navigation testing.
Build a public changelog and roadmap to boost community engagement.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	WorldIP.io	WhatIsMyIP.com	IPinfo.io	BGP.he.net
Free access, no signup or API key required	Yes, fully free with no signup or key for all lookups and browsing	Basic lookups free; signup required for some advanced features	Free tier available with usage limits; API key required	Free access; no signup for core BGP/ASN data
ASN, BGP, and organization depth	Full ASN mapping, BGP anomalies, org footprints, CIDR ranges	Limited ASN/BGP; focuses on basic geo and ISP	Strong ASN/org data on paid plans; free tier limited	Excellent BGP/ASN focus; less emphasis on individual IP geo
API availability and ease of use	REST API, no key for basic use, community SDK available	Limited or no public API documented	Full API with free tier limits and paid upgrades	No dedicated API; primarily web interface