Proxy IP blacklist check

What we check

• Spamhaus ZEN — the combined SBL + XBL + PBL list. Return codes tell you why: SBL (spam source), XBL (compromised host), PBL (dynamic / residential range).
• SpamCop — reports-based spam source list.
• Barracuda — Barracuda Reputation Block List.
• SORBS — spam & open-relay blocking system.

Why it matters for proxies

A proxy IP that is listed gets blocked or CAPTCHA’d. VeilSocks runs real carrier mobile IPs shared with genuine end-user traffic, so they stay clean on the lists that matter. See how we count our pool or why real SIM cards matter.