Contact and Support

If you need additional information, please fill out an electronic Contact Form or write to the MSRB at the address below.

Municipal Securities Rulemaking Board
1900 Duke Street, Suite 600
Alexandria, VA 22314

Main Phone: 703-797-6600
Fax: 703-797-6700

Visiting the MSRB.

For questions about MSRB Market Transparency Programs, call MSRB Support at 703-797-6668 or send an email to
Live Support: 7:30 a.m. - 6:30 p.m. ET

Email Support: 7:00 a.m. - 7:00 p.m. ET

Note: As of December 14, 2015, the MSRB’s new address and telephone number will be as follows:

Municipal Securities Rulemaking Board
1300 I Street NW, Suite 1000
Washington, DC 20005

Main Phone: 202-838-1500
MSRB Support: 202-838-1330