ur UR urapp.kr https://urapp.kr Small network tools

UR is a family of tiny public tools for IP and network work. Each app lives on its own host. Add a new entry to the catalog when another app ships.

urip URIP urip.kr https://urip.kr Your public IP Networking /urip.svg

Echoes the client address Cloudflare sees, plus optional geo and request metadata. Root returns plain text. Open /json, /xml, /yaml, /csv, /html, /headers, or /trace for the same lookup in another shape.

https://urip.kr https://urip.kr/json https://urip.kr/html urnet URNET urnet.kr https://urnet.kr IPv4 subnet calculator Networking /urnet.svg

Calculates CIDR fields for /{ip}/{prefix}: mask, network, broadcast, host range, first-octet address class, and shop-floor size (Class A=/8, Class B=/16, Class C=/24). Same format paths as URIP under each lookup.

https://urnet.kr/192.168.0.1/24 https://urnet.kr/192.168.0.10/8/json https://urnet.kr/10.0.0.1/16