Our Locations

  • Arizona

    Phoenix
    3930 East Watkins Street
    Suite 200
    Phoenix, AZ 85034
    602.324.6398


    California

    Los Angeles
    XO Communications
    818 West 7th Street
    Suite 980
    Los Angeles, CA 90017
    949.417.7158

    Santa Ana
    1924 East Deere Ave
    Ste. 110
    Santa Ana, CA 92705
    949.417.7158

    San Diego
    5771 Copley Drive
    San Diego, CA 92111
    858.244.4000

    Sacramento Area
    XO Communications
    1390 Lead Hill Blvd
    Roseville, CA 95661
    408.817.2800

    San Francisco Bay Area
    XO Communications
    855 Mission Court
    Building 1
    Fremont, CA 94539
    408.817.2800

    XO Communications
    12667 Alcosta Blvd
    Suite 350
    San Ramon CA 94583
    408.817.2800

    XO Communications
    651 Brannan St
    Suite 310
    San Francisco, CA 94107
    408.817.2800


    Colorado

    Denver
    XO Communications
    1660 Lincoln Street
    Suite 2600
    Denver, CO 80264
    303.539.1203


    Florida

    Miami Area
    Miramar
    XO Communications
    3100 SW 145th Avenue, Suite 310
    Miramar, FL 33027
    305.670.5659

    Tampa
    XO Communications
    5904 A Hampton Oaks Parkway
    Tampa, FL 33610
    813.301.4000


    Georgia

    Atlanta 
    XO Communications
    4000 Highlands Parkway SE 
    Smyrna, GA 30082 
    (678) 433-5783


    Illinois

    Chicago 
    XO Communications
    810 Jorie Boulevard 
    Oak Brook, IL 60523 
    (630) 371-3100

    XO Communications
    233 South Wacker, 35th Floor 
    Chicago, IL 60606 
    (312) 377-1000


    Maryland

    Baltimore 
    XO Communications
    100 Charles St. 
    Suite 208 
    Baltimore, MD 21201 
    (717) 441-5832


    Massachusetts

    Boston 
    XO Communications
    201 Jones Road, Suite 130 
    Waltham, MA 02451 
    (781) 693-390

  • Michigan

    Detroit 
    XO Communications
    21555 Melrose Ave, Suite 7 
    Southfield, MI 48075 
    (248) 415-5900


    Minnesota

    Minneapolis 
    XO Communications
    1200 Washington Avenue North 
    Minneapolis, MN 55401 
    (612) 338-7977


    Missouri

    St. Louis 
    XO Communications
    2020 Westport Center Dr 
    St. Louis, MO 63146 
    (314) 787-7663


    Nevada

    Las Vegas 
    XO Communications
    2240 Corporate Circle 
    Suite 100 
    Henderson, NV 89014 
    (702) 990-1000


    New Jersey

    Pennsauken 
    XO Communications
    4350 Haddenfield Road 
    Suite 102 
    Pennsauken, NJ 08109 
    (856) 773-5000


    New York

    New York 
    XO Communications
    40 Wall Street, 16th Floor 
    New York, NY 10005  
    (646) 443-9700


    Ohio

    Columbus 
    XO Communications
    4449 Easton Way 
    Suite 150 
    Columbus, OH 43219 
    (614) 629-3200

    Cleveland 
    XO Communications
    3 Summit Park Dr 
    Suite 750 
    Independence, OH 44131 
    (216) 619-3200


    Oregon

    Portland 
    XO Communications
    9000 SW Nimbus Ave. 
    Beaverton, OR 97008 
    (800) 915-2047


    Pennsylvania

    Allentown 
    XO Communications
    974 Marcon Blvd. 
    Suite 140 
    Allentown, PA 18109 
    (610) 862-5200

    Philadelphia 
    XO Communications
    974 Marcon Blvd. 
    Suite 140 
    Allentown, PA 18109 
    (610) 862-5200

    Plymouth Meeting 
    XO Communications
    450 Plymouth Road 
    Suite 100 
    Plymouth Meeting, PA 19462 
    (610) 862-5200

    Harrisburg 
    XO Communications
    991 Peiffers Lane 
    Harrisburg, PA 17109 
    (717) 441-9900

    Pittsburgh 
    XO Communications
    Allegheny Center Mall 
    Suite 03 
    Pittsburgh, PA 15212 
    (248) 415-5903

    Wyomissing 
    XO Communications
    1220 Broadcasting Road 
    Wyomissing, PA 19610  
    (610) 288-5363

  • Texas

    Austin 
    XO Communications
    2100 South IH-35 
    Austin, Texas 78704 
    (512) 692-1000

    Dallas 
    XO Communications
    1300 West Mockingbird Lane 
    Suite 200 
    Dallas, TX 75247 
    (214) 237-7700

    Houston 
    XO Communications
    2401 Portsmouth  
    Houston, TX 77098 
    (832) 200-2000

    San Antonio 
    XO Communications
    1030 Central Parkway South 
    San Antonio, TX 78209 
    (210) 587-0100


    Tennessee

    Memphis 
    XO Communications
    5127 Truse Road 
    Memphis, TN 38117 
    (901) 888-8930

    Nashville 
    XO Communications
    105 Molloy Street 
    Suite 300  
    Nashville, TN 37201 
    (615) 777-1600


    Utah

    Salt Lake City 
    XO Communications
    8851 South Sandy Parkway 
    Sandy, UT 84070 
    (801) 983-1600


    Washington

    Seattle 
    XO Communications
    1000 Denny Way 
    Suite 200 
    Seattle, WA 98109 
    (800) 915-2047

    Spokane 
    XO Communications
    1330 N. Washington Avenue 
    Suite 5000 
    Spokane, WA 99201 
    (800) 915-2047


    Washington DC Metro Area

    Headquarters< - DC/VA/MD
    XO Communications
    13865 Sunrise Valley Drive 
    Herndon, VA 20171 
    General Inquiries: (703) 547-2000 
    Sales: (703) 547-2290

    XO Communications
    1302 Concourse Drive 
    Suite 200 
    Linthicum, MD 21090 
    (703) 547-2291

    XO Communications
    4301 Connecticut Ave 
    NW Van Ness Center Mezz–3 
    Washington, DC 20008 
    (703) 547-2292