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If 994 is part of a phone number, it is not in the US, that is the country code for Azerbaijan.
I doubt it is a phone number, really.
What is the "From:" or similar address, from the text message in question?
Does the text message have any comprehensible textual content, even if in another language? or a link in it? (if there is a link in it, do not click on that link.)
If it is a string of machine code or the like and no language and nothing comprehensible, then I would delete it. It's probably a gag message, or a species of 'fishing' for responses, etc., and unworthy any notice. A species of message-Spam, as it were.