Contact Info at Consumer Affairs and Business Regulation General consumer inquiries can be directed to OCA. Specific inquiries can be directed to the appropriate agency below.
Ten Park Plaza, Suite 5170 Boston, MA 02116 Phone: (617) 973-8700 Fax: (617) 973-8799 Consumer Hotline: (617) 973-8787 or 888-283-3757 toll free (MA only) Website: www.mass.gov/consumer | Use our Question / Complaint Form to submit inquiries online. MassRelay Customer Service is available 7 days a week, 24 hours per day, 365 days a year Deaf and Hard of Hearing Users: 800-720-3480 Hearing Users: 800-720-3479 |
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Two South Station, 4th Floor Boston, MA 02110 Phone: (617) 305-3580 Fax: (617) 478-2591 Consumer Line: (617) 305-3531 or 800-392-6066 toll free (MA only) Website: www.mass.gov/dtc | 
One South Station, 3rd Floor Boston, MA 02110 Phone: (617) 956-1500 Fax: (617) 956-1599 Consumer Line: (617) 956-1501 or 800-495-2265 toll free (MA only) Website: www.mass.gov/dob |

One South Station, 5th Floor Boston, MA 02110 Detailed DOI Contact Information Phone: (617) 521-7794 Fax: (617) 521-7575 Consumer Line: (617) 521-7777 Website: www.mass.gov/doi | 
239 Causeway Street Boston, MA 02114 Detailed DPL Contact Information Phone: (617) 727-3074 Fax: (617) 727-1944 Consumer Line: (617) 727-7406 Website: www.mass.gov/dpl |

One Ashburton Place, Room 1115 Boston, MA 02108 Phone: (617) 727-3480 Fax: (617) 727-5705 Website: www.mass.gov/standards | 
One Ashburton Place, Room 1313 Boston, MA 02108 Phone: (617) 727-2581 Fax: (617) 227-6062 Website: www.mass.gov/src |