All-in-one IPv4 / IPv6 Address Lookup

AS153371 (BACK WAVES LIMITED) manages the 142.249.36.0/22 prefix block (approximately 1024 addresses) in the Other category. AS153371 independently controls its routing policy, peering relationships and IP allocation — BACK WAVES LIMITED is directly responsible for traffic to and from addresses in the 142.249.36.0/22 block. The IP 142.249.39.21 resides in Germany Hesse Los Angeles (timezone America/Los_Angeles); its position within this block determines routing behavior and connectivity characteristics.

No reverse DNS (PTR) record is configured, which is common for dynamically assigned or CGNAT'd addresses but limits reverse verification capability. PTR records are commonly used by mail servers and anti-spam systems to validate connecting IPs — their absence can affect deliverability to strict receivers.

Based on local classification and Spamhaus real-time reputation, no blacklist entries detected, no security risk flags detected. The Unknown category indicates this IP is part of normal Other infrastructure and carries low inherent risk. Balance risk-control with normal access patterns: standard rate limiting plus CAPTCHA on sensitive flows.

Recommendation: insufficient data to classify 142.249.39.21 — apply a balanced policy: standard rate limiting, CAPTCHA for sensitive operations, and monitor access logs for anomalies. Reassess as the IP's usage history accumulates in this site's archive.