I'm pretty sure that this location will be "sin" (Singapore), as it is close to your location in (presumably) Malaysia. Our resolvers in Singapore are getting timeouts from the
afraid.org authoritative nameservers located in the US (California, Nevada, Texas, and Virginia).
This expanded nameserver configuration will improve the reliability and lookup speed for your domain not only through Google Public DNS, but worldwide through any resolver.
In the meantime I will also contact our network team to try to understand why we cannot reach
afraid.org's AS36351 from our Singapore datacenter, and the
afraid.org administration to see if they are perhaps blocking queries from 173.194.90.* and 2404:6800:4003::/48