Reverse DNS PTR Resolver
Reverse DNS Lookup
Perform a quick Reverse DNS PTR lookup to determine the official system hostname and ISP carrier mapped to any IP address.
Reverse DNS Resolution Details
Target IP Address
123.127.121.1
Network Provider (ISP / ASN)
AS4808 (CHINA169-BJ - China Unicom Beijing Province Network, CN) [CN]
Remote Server Geolocation & Time
Country
China
China
Region & City
Beijing, Beijing
Postal Code
Coordinates (Lat / Lon)
39.911, 116.395
Timezone Mapped
Asia/Shanghai
Server Local Time
12:19:28 - 12.09.2026
Allocated RIR Network
APNIC (Asia-Pacific)
Autonomous Owner
Live Security Reputation Check
100% Clean Reputation
No spam, botnet attacks, or national threat flags identified for this host.
Spamhaus Zen RBL:
CLEAN
Barracuda Central:
CLEAN
USOM Threat Center:
CLEAN