Is 172.67.181.51 a VPN? No — Cloudflare, Inc..

No. 172.67.181.51 shows no VPN or proxy indicators — consistent with a residential, business, or trusted-infrastructure address — and does not match any of our 13 VPN, proxy, Tor, or datacenter intelligence sources.

172.67.181.51 is announced by AS13335 (Cloudflare, Inc.), located in Canada. The holder of the announced BGP prefix 172.67.176.0/20 is CLOUDFLARENET - Cloudflare, Inc.. You can look up other IPs on the same network via the IPLogs ASN directory.

No reason to block. This IP shows no anonymization or hosting risk signals. Use behavior-based risk scoring instead of IP-based blocks.

As safe as any other consumer IP. No threat-intel hits, no proxy/VPN match, no datacenter classification. Standard risk scoring applies.

If you visited iplogs.com from your own connection and were flagged clean, the cause is one of: a VPN client on your device or network, a corporate proxy, a CGNAT pool that overlaps with VPN exits, an ISP-level DNS resolver routing through Cloudflare/Apple infrastructure, or your IP being on a published commercial-VPN relay list. The "Why this IP is flagged" section above lists every source that matched — that's the dispute trail.

Hit our public API: `POST https://iplogs.com/v1/check` with body `{"ip":"172.67.181.51"}`. You get back a JSON verdict, score 0–1, every matched signal, ASN/geo info, and the full provenance list. Free, no signup, no API key. See /docs for client examples in curl, Python, Node.js and Go.