Yesterday I noticed that I was unable to listen to any of the Radio Paradise streams.  The error was not immediate, it took a while to time out in Windows software foobar2000.  

I checked DNS and it was not blocked.  
I checked firewall and sure enough IP address showed up on public blocklist blocklist_net_ua. 
# grep "74.207.194.78" blocklist_net_ua.ipset
74.207.194.78

I added radioparadise.com to the firewall whitelist and all streams are now working.  

The Radio Paradise entry might have already been removed from blocklist_net_ua because if you query 74.207.194.78 at list maintainer website https://blocklist.net.ua/check/?ip=74.207.194.78 it says it is NOT blocked.  

The firewall list description: 

blocklist_net_ua.ipset is a dynamic IP blocklist maintained by blocklist.net.ua that aggregates IP addresses identified as sources of spam, brute-force attacks, and other malicious activities. Designed for integration into Linux firewalls using ipset, it helps protect servers and networks by blocking traffic from dubious SMTP relays and unauthorized scanners.
The list is part of the FireHOL blocklist-ipsets repository and is updated frequently (every 10 minutes) to ensure timely threat mitigation. It is categorized under abuse and is widely recommended for use in firewall configurations like iptables or firewalld, though users should be aware of potential false positives.

I downloaded the latest list from https://iplists.firehol.org/?ipset=blocklist_net_ua and 74.207.194.78 was not there.  I would like to look at yesterday's source file because there are comments on each line but old copies do not appear available to the public.