I'm using a MacBook Pro with Mojave 10.14.6. I had entered a computername in System Preferences, Sharing of (not really) mymacbk. I am using Frontier's FiOS service, whose router normally attaches ".home" as the top level domain. For various reasons discussed elsewhere on the net (for example, 189350), a hyphen, digit combination is getting added to that, so I see mymacbk-3 using the hostname command from bash.
But, just for fun, I executed
ping mymacbk ping mymacbk.home
In both cases, I got back an IP address that, according to https://mxtoolbox.com/SuperTool.aspx reverse lookup tool, belongs to Akamai Tech: a23-202-231-168.deploy.static.akamaitechnologies.com Looking up both of my actual names (mymacbk and mymacbk.home) on their DNS Lookup returned nothing.
What is going on? More importantly, is this possibly a symptom of having been compromised or virus/malware infected?