HCC2D Decoder vs DNS Checker/Whois & IP Lookup

This app allows you to scan and decode HCC2D and QR code symbols using your mobile camera. It is based on advanced research in high-capacity barcode technologies and provides reliable decoding. Key features: * Decode HCC2D color codes. * Full support for standard QR codes. * Real-time scanning using the camera. * Robust detection and error correction. * No ads and no registration required. HCC2D is a color two-dimensional code format that increases data capacity compared to traditional QR codes while preserving their structure. By using multiple colors, each module can encode more information, enabling higher data density in a compact symbol. The app captures images, detects barcode regions, corrects perspective distortions, and analyzes color or intensity patterns to reconstruct the encoded data. To transfer files from a desktop computer to your smartphone via a stream of HCC2D codes, use HCC2D Decoder together with the HCC2D Streamer desktop companion app. Notes: HCC2D codes can be created using the official online generator at hcc2d.com, the HCC2D Encoder application, the open-source CLI encoder, or the Debian/Ubuntu packages provided through the official HCC2D APT repository. * Low-quality color printing may reduce decoding performance * Best results are achieved with screen-displayed or high-quality printed codes and a high-resolution autofocus camera. * One-dimensional barcodes are intentionally not supported. References: * Querini, M. (2026). HCC2D Code Specification — Version 0.9.0. Zenodo. https://doi.org/10.5281/zenodo.22206528. Licensed under the Creative Commons Attribution-NoDerivatives 4.0 International License (CC BY-ND 4.0). * Querini, M. and Italiano, G. F. (2014). Reliability and Data Density in High Capacity Color Barcodes. Computer Science and Information Systems, 11(4), 1595-1615. * Querini, M., Grillo, A., Lentini, A., and Italiano, G. F. (2011). 2D Color Barcodes for Mobile Phones. IJCSA, 8(1), 136-155. * Querini, M. (2010). Analysis and Design of High-Capacity Two-Dimensional Codes. Development of the Reader for Desktop and Mobile Environments (Bilingual Digital Edition 2026, Version 1.0). Zenodo. https://doi.org/10.5281/zenodo.22206722 Notice: This application is an independent personal project and is not affiliated with any organization or institution.

DNS Checker/Whois & IP Lookup is the network reference your phone has been missing. Type any hostname and instantly see the A records returned by Google, Cloudflare, Quad9, Alibaba, and your device's own resolver — side by side. Type any domain and pull live Whois data from the authoritative registry. No accounts, no signup, no fluff. WHY MULTIPLE RESOLVERS? Different DNS servers can return different answers for the same name. ISPs rewrite responses, CDN edges return geo-specific IPs, captive portals lie. By querying several well-known resolvers in parallel and comparing the results in one screen, you can spot DNS rewrites, debug propagation delays, and verify that your records have actually rolled out worldwide — not just in your ISP's cache. DNS LOOKUP - Parallel A-record queries against curated public resolvers - Includes the OS's configured local resolver for an apples-to-apples comparison - Per-server latency so you can see who answered fastest - Clear timeout / error markers when a resolver fails to respond - Recent-queries history for one-tap rerun WHOIS - RFC 3912 client with IANA referral for accurate TLD-to-registry handoff - Optional eTLD+1 normalisation: www.example.com is treated as example.com - Shows registrar, creation / expiry / updated timestamps, EPP status codes, and authoritative name servers - Raw response is always available for when you need the exact text ONE-TAP HANDOFF TO COMPANION TOOLS Found an interesting host? Pass it straight to a focused tool: - Ping it with PingGrid Pro - Web Monitor - Scan its ports with LANFinder - Ping & Port Scan - Check its SSL/TLS certificate with SSL Certificate Checker PRIVACY-FIRST DESIGN - Your queries are sent only to the resolvers and Whois registries you are querying — never to us - No accounts, no logins, no tracking pixels POLISHED TO MATCH YOUR PHONE - Native Material Design 3 user interface - Light and dark themes that follow the system setting - Localised in English, Traditional Chinese, Simplified Chinese, and Japanese WHO IT IS FOR - DevOps engineers and SREs verifying DNS propagation - Web developers debugging CDN routing and caching - Network administrators comparing ISP behaviour - Anyone curious why a domain "is not working" on one device and works fine on another DNS Checker/Whois & IP Lookup is fast, no-nonsense, and respects your privacy. Install it once and forget you ever struggled with nslookup on mobile.