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45.151.139.98 has a threat confidence score of 97%. This IP address from Russia (AS212913, FOP Hornostay Mykhaylo Ivanovych) has been observed in 2,885 honeypot sessions targeting SIP protocols. First observed on March 9, 2026, most recently active March 9, 2026.
Represents an automated SIP INVITE request likely generated by a scanner or bot rather than a legitimate user agent. The behavior is inferred from a combination of a numeric-only SIP Call-ID format and a direct INVITE to a long numeric target without prior registration or dialog context. This pattern is commonly associated with SIP service probing, extension discovery, or early-stage toll-fraud reconnaissance. This behavior indicates reconnaissance activity against a SIP service but does not, by itself, confirm successful call setup or financial abuse.