Documenting this number, call pattern fits calls from "charity" / firefighters telemarketers.
Calls have been from smaller towns on the eastern shore of Maryland (Chesapeake City, Rock Hall, Hurlock ....)
Google search indicates the number is Delmar, Md population 3,003
It also looks like Verizon Business services is providing local numbers to out of state concerns

No real info on the number, leaving a record of it here because this site has been good for me and if the number is bad, the entries will grow