IP address 103.203.57.21 has been flagged in 1230 abuse reports across 14 independent threat intelligence sources, resulting in a threat score of 100.0/100 (critical risk). The primary activity associated with this IP is abuseipdb blacklist, along with attacks, brute force, known malicious, malware c2, malware infrastructure, port scan, rdp bruteforce, reconnaissance, reputation low, ssh brute force.
This IP is geolocated in China and belongs to the network Beijing Tiantexin Tech. Co., Ltd. (AS136180). Reports span from 2026-05-04 to 2026-10-13.
Assessment: 103.203.57.21 is among the most actively malicious IP addresses in our database, with over 1230 abuse reports from 14 independent sources. Systematic port scanning activity from this IP indicates active reconnaissance of internet-facing services, typically a precursor to targeted exploitation.