DNS & IP Address Change Notice

What are we doing?

Colorado 811 has moved our computer equipment to a new building for our secondary site in Virginia. All Colorado 811 computer equipment serving our secondary site is now at a newer location with a more powerful network circuit. As a result of this physical server migration in Virginia we are required to assign new IP addresses to our Colorado 811 servers located in Virginia. This change only impacts our equipment at our secondary location. The Colorado site will not be impacted by this change. The Virginia site is used for load balancing and also as the failover site for Colorado 811 services. It is critically important that your I.T. department allow inbound and outbound network traffic from our new range of IP addresses to traverse your computer network. This is the best way to be sure that you do not experience a disruption in service if service at the Colorado location is degraded or lost.

What is DNS?

The Domain Name System (DNS) converts human readable domain names such as www.colorado811.org into Internet Protocol (IP) addresses like All customers connected to the internet use this service whether they are aware of it or not.

Why are we changing?

Colorado 811 moved the location of our server room in Virginia due to an expiring rental lease. Unfortunately, we are not able to keep our current IP addresses at the Virginia location as we initially planned.


January 23, 2020 at 6:00 PM Mountain

What do you need to do?

All stakeholders need to ensure their PC’s, servers, routers, firewalls, and any other networked devices that require access to Colorado 811 systems via the internet have our new DNS IP address ranges programmed / whitelisted. On 1/23/20 at approximately 6:00 PM, the old DNS IP addresses for our secondary site will be changed. Failure to take action may negatively impact your access to Colorado 811 online services. If your organization does not filter specific internet traffic on your network by IP, you may not be impacted at all. Please check with your IT Department to be sure.

What Services are impacted?

  • iDig811
  • Ticket Express
  • Web Ticket Entry
  • Positive Response
  • Update Lite
  • Excavator Expedite
  • Delivery: Positive Response
  • Delivery: Ticket Confirmations
  • Delivery: EMAIL
  • Delivery: XML

What IP Addresses do I allow?

IP Address Ranges
From To

Got Questions?

Systems Administrator – Tariq Abdul-Ghafurtabdul-ghafur@co811.org 303.205.6303

I.T Support Engineer – Scott Maysmay@co811.org 303.205.6327

Director of Information Technology – Juan Ruiz jruiz@co811.org 720.254.3760