IRS
Employee Plans Technical and Actuarial Division, Room 6526
Internal Revenue Service
1111 Constitution Avenue, N.W.
Washington, DC 20224
(202) 622-8300
http://www.irs.gov/

U.S. Department Of Labor
Division of Technical Assistance and Inquiries, Room N-5658
Pension and Welfare Benefits Administration
200 Constitution Avenue, N.W.
Washington, DC 20210
(202) 219-8233
http://www.dol.gov/

Pension Benefit Guaranty Corporation
Administrative Review and Technical Assistance Division
Pension Benefit Guaranty Corporation
1200 K Street, N.W.
Washington, DC 20005
(202) 326-4000
Consumer Hotline 1-800-400-7242
http://www.pbgc.gov/