Events Calendar Display Law Offices of John K. Mangum, P.C. Share: AttorneysLegal Services Law Offices of John K. Mangum, P.C. Visit Website Request Info 318 W. Roosevelt St. Phoenix, AZ 85003-1325 (602) 252-5222 (602) 252-2508 (fax) About Map About Government relations, legislative representation, state, county and city, administrative and business law. What's Nearby? Distance: 5 10 15 20 25 50 mi.