Data Sources & Methodology

Different tools use different data paths. International dialing and postal-code directories are local reference datasets; their coverage and detail vary and they are not all live feeds.

Phone numbering

Phone parsing uses libphonenumber-js metadata in the browser. It can check number format and selected numbering-plan details, but it does not identify a subscriber or current caller location. See the ITU E.164 recommendation and NANPA for official numbering references.

Postal codes

International postal formats and examples are local reference data, not address validation. The US ZIP lookup sends the entered code to Zippopotam.us and displays its response. Verify mailing and delivery details with USPS or the destination postal operator.

Other tools

QR and barcode generation and image decoding run in the browser. IP lookup sends requests to IP providers, which can see the connecting public IP and return approximate geolocation. Speed tests send samples to TheCodePlaza’s server. Website status checks send the submitted URL to our server, which requests that address. Product and ISBN searches may query UPCitemdb, Open Food Facts, or Open Library.

Corrections

There is no fixed update interval for every local dataset, and we do not claim every record has been independently verified. Send a page URL and reliable source to info@thecodeplaza.com for review. See the Privacy Policy for analytics and network-request details.