Communicative domain name which sound like an expression "call who?". Incredibly catchy and professional.
Calhoo has only six characters and only two syllables. Two syllable names make popular global brands. Two syllable names are used by established brands like WeChat, Buffer and Ikea.
This domain was first registered in June 2016. Older domains have an advantage when ranking in search engines.
Calhoo.com is a .com domain. Dot com domains are the most popular, and the most valued. When you own a .com, it is much easier to rank for your own name in search engines.