Why is my ISP identification tool showing wrong data?

hey everyone, i just launched our new 'What is My ISP?' web tool, and something's seriously broken.

the core functionality, the actual ISP identification, is giving totally wrong results for so many users. especially for mobile connections or specific regional IPs, it's driving me absolutely nuts.

i've already checked our primary IP lookup API probably a dozen times, cross-referenced with a secondary one, and even tried updating our internal IP-to-ISP database a few times. i mean, we've done everything i can think of, but nothing seems to fix this persistent issue.

desperately need expert advice on how to debug this or if there's a more reliable method for accurate ISP data. what am i missing here? really waiting for an expert reply, thanks in advance!