I believe ARC stopped using 155.205 years ago, but did notice they relicensed it in 2023. However, it was relicensed by ARC Headquarters in VA for a location that hasn't been ARC for several years as well.
47.42 is the nationwide Red Cross frequency. I don't think NH uses it anymore. When I was involved with them, ARC only provided a 47.42 base station and the chapters were in their own. Even back then, it was at best a hodge podge of radios and most were already old.