IPOK checks an IP address and shows why it scored the way it did. It reads six live reputation sources (Scamalytics, proxycheck, AbuseIPDB, ipapi.is, StopForumSpam and ip-api) plus an offline database built from the Tor exit list, X4BNet's VPN ranges and the Spamhaus DROP list, and weights them instead of averaging. A datacenter address needs two specialist sources to agree before it gets flagged, so whole AWS or Hetzner ranges are not written off as proxies; a residential address needs only one. You also get the /24 neighbourhood score, ASN history with first-seen and last-seen dates, and a per-source breakdown of the final number. The methodology page explains the weights and the data sources page shows what each source contributed.

Beyond the single lookup there is a batch lookup for IP lists and CIDR ranges with geo, ASN and a quick risk estimate, a side-by-side comparison of two addresses, a speed test with dual-source bandwidth and latency measured from several regions, and a free developer API for IP, BGP and reverse-IP queries. A short study on the site shows how six sources can vote six different ways on the same IP.

No account and no paywall. There is a CLI you can run on a VPS over SSH so the check never passes through your browser or a proxy, a Chrome extension, and an iOS app on the App Store (https://apps.apple.com/us/app/ipok-ip-risk-leak-check/id6781751697). The site is in English and Chinese.