When AdGuard software (VPN, AdBlocker, DNS client) is running on a device, it may communicate with tb.rg.adguard.net to perform the following:
For users looking to improve their online privacy and browsing experience, AdGuard offers several benefits: tb.rg adguard.net public.php
If you are a power user and want to verify this behavior: When AdGuard software (VPN, AdBlocker, DNS client) is