How do I confirm I own a ".by" domain name?

Hi Everyone. I’m a bit of a newbie when it comes to IDNs and need just a little bit of help…

I registered a domain with 101domain. It has a ”.by” extension. It took a few weeks but eventually the order cleared and according to 101domain.com I own the domain…

However, there is something about 101domain.com that just makes me suspicious and I’m growing doubtful as to whether or not I really do own the domain or if I am being scammed…

Wondering if you can help me out with a few things questions…

1) Are there other ways to confirm I own my ”.by” domain? I have searched for WHOIS lookup sites but can’t find one that supports ”.by” domains.

2) Regardless of whether not 101domain.com is legit or not I’d like to transfer my domain elsewhere. Whats a good and trustworthy site that will allow me to transfer my domain name to? I tried Godaddy but they don’t support .by. (I guess that was super newbie of me, lol)

3) Same question as #2 but just in case it’s a different answer: What’s a good and trustworthy site to REGISTER a new ”.by” domain that I don’t already own anywhere else.