# IPLogs

> Free, no-signup VPN, proxy, datacenter, Tor, Cloudflare WARP, and Apple Private Relay IP detection. Public REST API at https://iplogs.com/v1/check. Combines 13 intelligence sources (Mullvad, PIA, IVPN, AirVPN, Surfshark, IPVanish, AzireVPN per-relay APIs, plus X4BNet aggregator, FireHOL Level 2/3, CINS, Tor Project, Apple's official egress list, AbuseIPDB) with active OpenVPN/WireGuard/IKEv2 protocol probing. Multi-source provenance is returned with every verdict. IPv4 + IPv6 first-class.

## Core pages

- [Home / IP checker](https://iplogs.com): Live verdict for any IPv4 or IPv6 in under 2 seconds. Verdict, score, full signal set, ASN, geolocation, and per-source provenance.
- [API documentation](https://iplogs.com/docs): Endpoint reference, signal catalog, rate limits, client SDK examples in curl, Python, Node.js, Go, PHP.
- [Frequently asked questions](https://iplogs.com/faq): How detection works, accuracy, residential-proxy handling, integration.
- [About IPLogs](https://iplogs.com/about): Project motivation, comparison to commercial alternatives.
- [Blog](https://iplogs.com/blog): Research-backed posts on VPN detection, censorship, JA3/JA4 fingerprinting.
- [Free datasets](https://iplogs.com/tools): Downloadable CIDR/CSV/JSON snapshots of every dataset we ingest. CC-BY 4.0.

## Implementation guides

- [How to detect VPN users on your website](https://iplogs.com/guides/detect-vpn-users): Working code in Node.js, Python, Go, PHP, Cloudflare Workers.
- [How to block VPN, proxy, Tor traffic](https://iplogs.com/guides/block-vpn-traffic): Cloudflare WAF, Nginx, Caddy, Stripe Radar recipes. False-positive playbook.
- [Why is my IP flagged as a VPN?](https://iplogs.com/guides/why-flagged-as-vpn): 12 real reasons (CGNAT, mobile carriers, iCloud Private Relay, Cloudflare WARP, residential proxies) and how to dispute.
- [Residential vs datacenter IP detection](https://iplogs.com/guides/residential-proxy-detection): Why ASN classification alone fails, and the additional signals (RTT mismatch, BGP single-homing, JA3) that work.

## Accuracy & comparisons

- [Published accuracy benchmark](https://iplogs.com/accuracy): 0.3% false-positive / 0.9% false-negative rate on a ~1,100-IP ground-truth corpus validated against Team Cymru. 100% detection of published Mullvad relays and Tor exits. Full methodology, reproduce commands.
- [VPN detection API comparison](https://iplogs.com/compare/vpn-detection-apis): Same-IP head-to-head benchmark of IPLogs vs IPQualityScore, MaxMind, IPinfo, proxycheck.io, vpnapi.io, ip.teoh.io. Disclosed methodology, test date, reproducible curls.
- [All head-to-head comparisons](https://iplogs.com/compare): IPLogs vs each major vendor, one page per pairing.
- [Glossary](https://iplogs.com/glossary): Plain-English definitions of VPN detection, residential proxy, CGNAT, Tor exit node, JA3 fingerprint, and 13 more terms.

## Data surfaces (all public, all free, all CC-BY 4.0)

- [Tor exit nodes](https://iplogs.com/tor-exit-nodes): Live merged list (torbulkexitlist + onionoo IPv6) refreshed hourly.
- [Datacenter IP ranges](https://iplogs.com/datacenter-ip-ranges): Catalog of major hosting ASNs (AWS, GCP, Azure, Hetzner, OVH, DigitalOcean, Vultr, Leaseweb).
- [Aggregated VPN provider snapshot](https://iplogs.com/data/vpn-providers.json): Every commercial VPN exit IP we ingest, refreshed every 6-12 hours.

## Example per-IP, per-ASN, per-country, per-VPN pages

- [IP 8.8.8.8](https://iplogs.com/ip/8.8.8.8): Is Google's public DNS a VPN? Full verdict page.
- [IP 1.1.1.1](https://iplogs.com/ip/1.1.1.1): Cloudflare DNS verdict page.
- [IPv6 2606:4700:4700::1111](https://iplogs.com/ip/2606:4700:4700::1111): IPv6 lookup example.
- [ASN AS15169 (Google)](https://iplogs.com/asn/AS15169): ASN classification page.
- [ASN AS13335 (Cloudflare)](https://iplogs.com/asn/AS13335): CDN ASN example.
- [ASN AS397397 (Mullvad)](https://iplogs.com/asn/AS397397): VPN-provider ASN example.
- [United States](https://iplogs.com/country/US): Country hub — notable ASNs, VPN jurisdictions.
- [Germany](https://iplogs.com/country/DE): Country hub example.
- [Mullvad](https://iplogs.com/vpn/mullvad): Per-provider detectability page.
- [NordVPN](https://iplogs.com/vpn/nordvpn): Per-provider detectability page.

## Legal

- [Privacy policy](https://iplogs.com/privacy)
- [Terms of service](https://iplogs.com/terms)

## Full text corpus

Full machine-readable corpus for retrieval and citation:

- [llms-full.txt](https://iplogs.com/llms-full.txt)