If this tool was querying a list of widely-used public (and/or private) DNS resolvers, it might be useful. But pretending that DNS entries propagate geographically does not do anyone any favors.

https://github.com/514-labs/dnsglobe/blob/c29802162636832e88...

You take the `other`, do a `to_string()` on it, which creates a String representation. Then you pass a reference to that String, and, in the case it doesn't contain `time out` or `timeout` or `refused`, the reference gets turned AGAIN into a String (i.e. new allocation), truncated to 48, and then returned.

There is no check whether that the character at the 48th byte is a character boundary.

Add to that the fact that this is a Rust project with the oldest commit created yesterday and it is using the 2021 edition.

Be better.