Underscore In Domain Name. Underscore characters MUST NOT be placed. Its actually perfectly legal to have an underscore in a domain name except for one thing.
Google recommends using hyphens instead of underscores in your URLs. How to register a name. Often referred to as a low dash an underscore looks like an elongated hyphen.
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Its actually perfectly legal to have an underscore in a domain name except for one thing. Resource name and host name. What Is an Underscore. I also get asked if underscores are an alternative to hyphens when choosing domain names.