'DNS Hosts behind the same IP

Recently, I bought a domain name at www.active-domain.com I use it for my home network, so we're talking about NAT and dynamic IP. As my IP is dynamic, i can't create a delegation to use my own DNS server. active-domain act as the DNS server, so i can only create : A, CNAME, URL Redirect, URL Frame and TXT records.

That said, here's my question : as i am behind a NAT, is it possible to create several hosts behind the same IP?

Example :
I want that srv1.mydomain.com point to 192.168.0.101 in my network.
I want that srv2.mydomain.com point to 192.168.0.102 in my network.
But from the outside, both point to (example)74.0.0.1

In short :
srv1.mydomain.com -> 74.0.0.1 -> 192.168.0.101
srv2.mydomain.com -> 74.0.0.1 -> 192.168.0.102

Thanks.



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