About InfraUtil

Practical tools for everyday tasks

InfraUtil provides CIDR calculations, IP country and ASN lookups, MCC/MNC lookups, text comparisons, JSON formatting and Unix timestamp conversions.

Simple, accessible and multilingual

Use the tools without creating an account. English, Korean and Japanese pages are available. Most calculations run locally in your browser; IP lookup uses our server.

Data sources

IP data is powered by IPLocate.io under CC BY-SA 4.0. MCC/MNC assignments come from the ITU E.212 register and the amendments described on the lookup page. Source data can contain errors or become outdated.

Feedback

Use the Contact page to report a problem or suggest a correction. Verify important results independently before changing systems or making operational decisions.