In tracking calls from area code 888, it appears that this is a favorite "cover" for numbers coming in from oveseas, like India. In August, 2012, the name H. M. Group showed up for 888-871-0778 (and the like). The Better Business Bureau gives them the grade of "F".
You pay for your phone service. You have a right to the privacy of your number. The laws were changed about 2006 that wrecked that right to privacy, so that friends of "politicians in congress" could make money. Vote the "scalawags" out of office, and vote into office people who understand the Constitution and will abide by it.