• Looking for a scalable communications solution that your business can rely on — and won't bust the budget? Consider XO Communications. As the nation's top provider for business VoIP services, XO has local, national, and international capabilities that support your business across the globe. Whether you're in a small business that's rapidly expanding, or a larger enterprise adding additional locations, you can count on the real-world experience of XO Communications to help you overcome any communications challenges that arise.

  • The XO Service Portfolio: Washington, D.C.

    XO is proud to serve businesses and organizations throughout the greater DC metro area. In Washington DC, our most popular services include:

    Hosted PBX

    Experience superior, crystal clear voice call quality while enjoying the predictable monthly fees associated with XO's Hosted PBX. With no expensive equipment to buy and maintain, your business can quickly reap the rewards that Hosted PBX provides. Learn more about our Hosted PBX services.

    Cloud Services

    Looking for a way to better streamline your network and communications? Choose Cloud Services from XO. Our cloud-based solutions can be scaled to meet your business' needs and are a great way to keep ongoing and capital investment costs down. Learn more about our Cloud Services.

    SIP Trunking

    Streamline your voice, data and internet into a single, easy to manage solution and enjoy reduced costs and improved network performance in the process. With SIP Trunking from XO, you can take advantage of advanced VoIP features using your existing IP-PBX system. Learn more about our SIP Trunking services.


    Need fast application deployment but also need to reduce costs? Choose MPLS IP-VPN from XO. Built on the latest MPLS technology, our IP-VPN offers a secure solution with streamlined network management. Learn more about our MPLS IP-VPN services.


    Easily and affordably converge your LAN and WAN across your business locations with Ethernet services from XO. Our simple, scalable Ethernet services let you deliver VoIP, Internet access and other managed applications to all of your branch offices. Learn more about our Ethernet services.


    Privately transport both IP and non-IP traffic and maintain full network control with XO Ethernet Virtual Private LAN Service (VPLS). Learn more about our VPLS services.

    A Variety of Service Offerings from XO Communications

    XO has helped businesses throughout the Washington, DC metro area with their communications needs—and we're certain to have a service or solution that can meet your business' needs. See the full list of services.

  • The Right Network for Your Business

    Better solutions demand door-to-door delivery of communications traffic at the fastest speeds available. With XO, you’ll have leading IP and networking solutions delivered over our own private, award winning nationwide network to all your locations. Our unique combination of nationwide IP and transport networks, metro networks and fixed wireless capabilities allows us to provide maximum coverage, performance and scalability.

    Learn more about why we have The Right Network for your business >>

  • Medium/Enterprise Sales

    Let our local experts design a solution to meet your unique business needs with a free consultation.


  • Small Business Sales

    Call to talk to one of our Small Business Consultants, or click to fill out the form


    Request Small Business Pricing
  • Colocation Facilities

    Washington (L Street)
    1220 L Street
    2nd Floor
    Washington, D.C. 2005

    Washington (Connecticut Ave)
    4301 Connecticut Avenue
    1st Floor
    Washington, D.C. 20008

    Washington (Vermont Ave)
    1120 Vermont Avenue NW
    2nd Floor
    Washington, D.C. 20005

  • Reduce Mobile Costs with XO WorkTime

  • Sales Office Locations

    XO Communications
    1302 Concourse Drive
    Suite 200
    Linthicum, MD 21090
    (717) 441-5832

    XO Communications
    4301 Connecticut Ave
    NW Van Ness Center Mezzanine - 3
    Washington, DC 20008
    (202) 207-9904

    XO Communications
    13865 Sunrise Valley Drive
    Herndon, VA 20171
    (703) 547-2217

  • 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.

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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.