The following senators have offices in the Hart building in Washington, D.C.

Tammy Baldwin (D-Wisconsin) Room 717
    Max Baucus (D-Montana) Room 511
    Richard Blumenthal (D-Connecticut) Room 702
    John Boozman (R-Arkansas) Room 320
    Barbara Boxer (D-California) Room 112
    Sherrod Brown (D-Ohio) Room 713
    Maria Cantwell (D-Washington) Room 311
    Ben Cardin (D-Maryland) Room 509
    Thomas Carper (D-Delaware) Room 513
    John Cornyn (R-Texas) Room 517
    Richard Durbin (D-Illinois) Room 711
    Dianne Feinstein (D-California) Room 331
    Debra Fischer (R-Nebraska) Room 825B
    Al Franken (D-Minnesota) Room 309
    Chuck Grassley (R-Iowa) Room 135
    Tom Harkin (D-Iowa) Room 731
    Orrin Hatch (R-Utah) Room 104
    Tim Johnson (D-South Dakota) Room 136
    Mark Kirk (R-Illinois) Room 524
    Amy Klobuchar (D-Minnesota) Room 302
    Mary Landrieu (D-Louisiana) Room 703
    Mike Lee (R-Utah) Room 316
    Joe Manchin (D-West Virginia) Room 303
    Claire McCaskill (D-Missouri) Room 506
    Robert Menendez (D-New Jersey) Room 528
    Jeff Merkley (D-Oregon) Room 313
    Barbara Mikulski (D-Maryland) Room 503
    Lisa Murkowski (R-Alaska) Room 709
    Bill Nelson (D-Florida) Room 716
    Jack Reed (D-Rhode Island) Room 728
    Harry Reid (D-Nevada) Room 522
    Pat Roberts (R-Kansas) Room 109
    John Rockefeller (D-West Virginia) Room 531
    Brian Schatz (D-Hawaii) Room 722
    Charles Schumer (D-New York) Room 322
    Jeanne Shaheen (D-New Hampshire) Room 520
    Debbie Stabenow (D-Michigan) Room 133
    Jon Tester (D-Montana) Room 724
    Pat Toomey (R-Pennsylvania) Room 502
    Mark Udall (D-Colorado) Room 730
    Tom Udall (D-New Mexico) Room 110
    David Vitter (R-Louisiana) Room 516
    Elizabeth Warren (D-Massachusetts) Room 317
    Sheldon Whitehouse (D-Rhode Island) Room 530

Source: www.senate.gov