Atlantic Express bus company, Located state wide uses 153.005 with a repeater located I believe in Boston. Covers most of Massachusetts, Used by many branches of this company. Also local bus to base bus to bus simplex in Billerica is 47.540. Co part, A auto auction located in north Billerica Mass. uses FRS channel 7 with a quiet code of 7 for thier yard dispatch. 500 Mw low power, So you must be close to hear them. Any one interested in any frequencies in north east Massachusetts or southern New Hampshire, Let me know, I will do my best to find them for you. Chip/N1WKS/KAIZ9790