• Partner with XO to create a voice and data communications solution to meet your company’s unique needs. XO operates its own Tier 1 IP network and serves exclusively businesses in over 85 major markets across the U.S.

    For service information and pricing request information call 866-349-0134 for business services or 800-474-1763 for wholesale services.

  • 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
    XO Communications
    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
    1601 Trapelo Road, Suite 135
    Waltham, MA 02451
    (781) 693-3900

    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
    (206) 315-5084

    Pennsylvania

    Allentown
    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
    (206)-315-5084

    Spokane
    XO Communications
    1330 N. Washington Avenue
    Suite 5000
    Spokane, WA 99201
    (206) 315-5084

    Washington DC Metro Area
    DC / VA / MD
    Headquarters
    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 Mezzanine – 3
    Washington, DC 20008
    (703) 547-2292

  • Curious about our network coverage?

    The core of the XO IP network is a mesh of multiple 10 Gigabit (Gbps) circuits, connecting XO network nodes, peering POPs and XO Data Centers nationwide. The XO IP backbone runs across its own intercity fiber facilities, supported by terabit-capable core routing platforms and high-capacity peering interconnections. XO offers Dedicated Internet Access (DIA) and IP Transit customers enhanced Internet connectivity. This network design delivers maximum end-to-end throughput as well as high levels of protection, redundancy, and Quality of Service required to support XO Voice over IP services

    The XO IP network utilizes an advanced IP design, ensuring scalability as well as the ability to offer advanced future IP services plus the added benefit of no single IP point of failure past the customers' access port

    And since the XO IP network and market connections run end-to-end across XO facilities, XO can quickly resolve any problems that may occur; which eliminates many of the common failure points found in older network designs.

  • Check for Service

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    XO serves businesses nationwide and has global reach to more than 50 countries. Submit your U.S. business address to find out service options at your location.