An ASN (Autonomous System Number) identifies a specific network operator on the internet, such as an ISP, hosting provider, or large company managing its own IP ranges. Looking it up can help identify which organization actually controls a given IP address.

Why does the IP lookup show a different city than expected?

Mobile networks, VPNs, and large ISPs often route traffic through regional hubs, so geolocation data may reflect that hub rather than the device's actual location. This is a known limitation of IP-based geolocation generally, not specific to any one lookup tool.

Hostperl DNS Tools

IP Lookup

Look up geolocation and network information for any IP address, including country, city, ASN, and ISP where available.

Looking up an IP address can help identify the network or provider behind it, troubleshoot connectivity issues, or investigate suspicious traffic in server logs.

Frequently asked questions

IP geolocation is generally accurate at the country level and often reasonably accurate at the city or region level, but it isn't precise — it reflects where the IP block is registered or routed, not necessarily the exact physical location of a device using it.