All-in-one IPv4 / IPv6 Address Lookup

AS37963（Hangzhou Alibaba Advertising Co.,Ltd.） (Alibaba) manages the 203.107.0.0/17 prefix block (approximately 32768 addresses) in the Datacenter / Cloud category. Cloudflare edge (early AS), used for CDN and security services. The IP 203.107.45.167 resides in China Shandong Jinan (timezone Asia/Shanghai); its position within this block determines routing behavior and connectivity characteristics.

The reverse DNS record resolves to catl.com, which may reflect a different service layer or hosting configuration. The mismatch between PTR and provider name may cause elevated scrutiny from mail servers and WAFs during reverse verification.

Based on local classification and Spamhaus real-time reputation, no blacklist entries detected, associated risks: datacenter. The Cloud server / datacenter category indicates this IP is part of normal Datacenter / Cloud infrastructure and carries low inherent risk. As a datacenter address, risk-control focus should be on request patterns (user-agent, frequency, behavior chains) rather than the IP alone.

Recommendation: 203.107.45.167 is a datacenter/cloud IP — it may host legitimate services (APIs, CDNs, bots) or serve as an attack vector. Evaluate each request context: allow known API integrations, challenge or block unknown automated traffic, and never trust the client-reported IP for geo-based decisions.

Datacenter IPs are frequently used for legitimate API integrations, automated monitoring and infrastructure tasks — evaluate each request context before blocking. If you need to distinguish automation from real-user traffic, focus on request headers (User-Agent, Accept) and behavioral patterns rather than IP reputation alone.