All-in-one IPv4 / IPv6 Address Lookup

AS5607（Sky UK Limited） (Amazon.com, Inc.) manages the 51.187.216.0/21 prefix block (approximately 2048 addresses) in the Datacenter / Cloud category. AS5607 independently controls its routing policy, peering relationships and IP allocation — Amazon.com, Inc. is directly responsible for traffic to and from addresses in the 51.187.216.0/21 block. The IP 51.187.217.41 resides in United States Colorado (timezone Europe/Dublin); its position within this block determines routing behavior and connectivity characteristics.

The reverse DNS record resolves to 33bbd929.skybroadband.com, which is consistent with the registered provider. This alignment with the registered provider is favorable for email deliverability and system trust scores.

Based on local classification and Spamhaus real-time reputation (Spamhaus PBL: clean), associated risks: datacenter, enduser. 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: 51.187.217.41 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.