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