Communicative domain name which sound like an expression "call who?". Incredibly catchy and professional.
The word "calhoo" contains only six characters and just two syllables. Two-syllable names are highly rare and extremely valued. Two syllable names are used by established brands like Visa, Gillette and Buffer.
Calhoo.com is a dot-com domain. Dot com domains are the most prestigious domain extension in the world, famously used by websites like twitter.com. Owning a dot-com says that you own the word "calhoo" online.
This domain was first registered in June 2016. Older domains have an advantage when ranking in search engines.