I have a 617-590-xxxx number.  Received a text from 617-285-5563 with the question "You up?" --- this arrived at 2:58 AM on Sunday April 27th.
I of course did not respond.  I am classifying this as a prank.
I worked with a fellow whose Verizon cell phone number began 617-285-xxxx but was not this number.  I would be willing to bet that whoever owns the 617-285-5563 phone, they are using a Verizon Wireless cell phone or smart phone.