Significant Threat
IP 194.213.3.21 is a high-risk address associated with VoIP fraud, having accumulated 261 total abuse reports with a threat-level score of 8 out of 10, placing it among the more significant threats documented in public intelligence feeds. The IP originates from the United Kingdom and is routed through AS212027, operated by PebbleHost Ltd, a hosting provider whose infrastructure has been leveraged for malicious activity. While the activity-frequency metric indicates no recent surge in detected attacks, the sustained volume of historical reports and the 74% confidence score establish a pattern of abusive behavior that remains relevant to defenders filtering incoming traffic.
Automated honeypot sensors detected this address engaging in fraudulent VoIP activity across the January–April 2026 reporting window, with 20 of the most recent reports specifically categorizing the threat as VoIP fraud. The concentration of identical report types across multiple independent sensors reinforces the confidence rating and suggests the IP has been systematically probed or exploited for telephony-related abuse rather than being flagged incidentally. The geographic assignment to the United Kingdom is notable, as many operators may assume domestic traffic carries lower risk, potentially leading to insufficient scrutiny of such connections.
Fraud VoIP exploitation involves manipulating voice-over-internet-protocol infrastructure to place unauthorized calls, frequently targeting premium-rate or international numbers to generate illicit revenue. For organizations operating SIP endpoints, session-border controllers, or any telephony-adjacent services, an IP with this abuse history represents a concrete financial and operational risk if permitted to reach authentication interfaces or call-routing logic. Even without active scanning at the present moment, the documented history indicates the address has been used to compromise telephony systems, and its reactivation is a realistic possibility if defensive controls lapse.
Site operators should block IP 194.213.3.21 at the firewall or network perimeter to eliminate any inbound access to VoIP or administrative services. Implement call-authentication mechanisms such as STIR/SHAKEN for any SIP infrastructure and monitor call-detail records for anomalous patterns consistent with toll fraud. Restrict international and premium-rate dialing where possible, and consider deploying tools like fail2ban to dynamically block repeat offenders. Regular review of VoIP access logs against updated threat-intelligence feeds will help ensure addresses with this reputation profile remain denied.
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