You can't totally go by the radio-locator maps but I had checked them out (and posted links to them on Graham's site). WCRN's main signal (day) only reaches out to the west end of the 128 belt, while the distant covers a wide swath from Springfield to the ocean. On the North Shore, WCRN does come in but it's not a primo signal,
at least in my car.The "fringe" signal does include parts of VT, NH, a small bit of ME, RI, and CT, but again we're talking fringe. (Part of "distant" may reach some of these.)
WESO reaches parts of MA, RI, and CT. WPLM (day) reaches Plymouth and the Cape with its "local" signal and the distant signal reaches a swath going from
Beverly down to Norwood, while WBNW's distant signal will reach Fitchburg, Boston, Worcester and Brockton. On radio-locator, the local is confined by a red
mark, distant by purple, and fringe by blue.
But keep in mind this is very optimistic groundwave coverage and you have to factor in interference and workplace-listening situations. When the time came for the Big Announcement, I found I could only pick up WCRN on my clock radio when I unplugged my cell phone, which was charging.
Ultimately the signals involved will be "OK, yeah it comes in, kinda" more than a real gangbusters signal, but it will depend where you are. It won't be as powerful as
WRKO or the 96.9 signal though for SOME it WILL be very strong.
So, they may not reach Boston proper with a LOCAL signal, but the next category, DISTANT does qualify. And yes it will reach all 6 New England states but only portions of them, and not that strong. It's kind of like when I go to Rutland, VT and try to pick up Howie's show on WVMT. That starts to fade; I try WRKO, and
stations in Binghamton and Baltimore are crowding him out. WCRN will come in,
faintly.(As will an FM from NH) So yes, they reach New England's 6 states but only in part and it depends
on where you are and what type of radio you have. Some at work may find they're
better off tuning into the stream via computer or smart phone.