alexander-hagemann.de

Personal collection of self-hosted tools.

IP Lookup

Check your public IPv4 and IPv6 addresses along with geolocation data (country, region, city, ISP, coordinates, timezone).

CIDR Calculator

Enter an IPv4 or IPv6 address and a prefix length to get the start and end address of that range.

Is It Up?

Check whether a website is reachable, with response time, HTTP status, and the exact stage a failed check broke down at.