Urgent: IP Lookup Tool suddenly failing on geolocation API calls, returning empty data for specific IPs!

hey everyone, really need some help here, i'm completely stuck and kinda desperate. we launched our 'IP Lookup Tool' a few weeks ago, and its core ip address lookup feature has been running pretty smoothly. but since this morning, our geolocation API calls are acting super weird.

for specific IP addresses, especially what seem to be residential ones or certain ISPs, the tool is returning absolutely no data or just generic 'unknown' for location details. it's like the geolocation API is just ignoring those requests or sending back empty responses even though we're getting HTTP 200s. i've checked our API keys, rate limits, and everything on our end seems fine. i've even tried testing with known good IPs from different networks, and some work, some don't, it's driving me crazy. this is a core feature of our tool, and users are already complaining. i've been debugging for hours and i'm just hitting a wall. anyone faced this before?