Having trouble connecting to Mongo DB from hosting server

Hi,

I tried to use both Google’s servers, neither could resolve a MongoDB address. They could not even resolve mongodb.net.
I have two different projects on cloud.mongodb.com. Both of them are set to accept connections from 0.0.0.0/0, but I could only connect to one, not the other.
How could I troubleshoot this?

Thanks

 nslookup
> server 8.8.8.8
Default server: 8.8.8.8
Address: 8.8.8.8#53
> radtech-shard-00-02.p4cyn.mongodb.net 
Server:		8.8.8.8
Address:	8.8.8.8#53

** server can't find radtech-shard-00-02.p4cyn.mongodb.net: NXDOMAIN
> sandbox-encryption.g7xx2.mongodb.net
Server:		8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
*** Can't find sandbox-encryption.g7xx2.mongodb.net: No answer
> mongodb.net
Server:		8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
*** Can't find mongodb.net: No answer
> server 8.8.4.4
Default server: 8.8.4.4
Address: 8.8.4.4#53
> mongodb.net
Server:		8.8.4.4
Address:	8.8.4.4#53

Non-authoritative answer:
*** Can't find mongodb.net: No answer
>