Domain name, or your home address on the internet, when translated into an IP address, or a range of numbers that the machine can understand, is using a Domain Name System (DNS) service. See DNS Server for further explanation on how it works. The service is used each time you type an alphabetical address such as, to translate it to an IP address such as 198.102.746.4.

However, when an IP address keeps changing for the same domain name, that is, when the webpage changes its location on the network frequently (basically, each time a user connects to it), an update to the service, called Dynamic DNS, is necessary in order to successfully locate that domain. This update of a local database on a DNS server with dynamic IP addresses or temporary addresses for a domain name, is done in real time and without manual editing.

Dynamic DNS service works with DNS server and forwards domain name details for each temporary IP address to the Dynamic Host Configuration Protocol (DHCP) computer. DHCP server grants an IP address for a limited period of time, and then renews it. The used IP addresses are never disposed of, but collected in an IP address pool from which they will be immediately assigned to another user.

Static IP address vs. Dynamic IP address

Static IP address is a number assigned to a computer to serve as its home address on the internet and not to change, something like a home phone number

Dynamic IP address is a number temporarily assigned to a computer from a pool of IP addresses, constantly renewed an recycled, something like a public phone/payphone number

Why Dynamic DNS is necessary?

  • There are not enough IP addresses to go around as static IP addresses
  • Your unchanging domain name, i.e., should be easily located although it keeps changing its locations, i.e. 198.102.746.4, 198.102.746.5…

The benefits of choosing a Dynamic DNS Service Provider

A number of providers offer to install a Dynamic DNS application on their client’s computer. The application alerts the DNS provider each time the IP address is added, removed or modified. The client’s DNS records are then swiftly updated with the new IP address. If you choose to require such service:

  • Your visitors will always be able to access your website
  • You won’t need to refresh your DNS server every now and then
  • You will avoid setting up a new static IP address each time network settings change
  • You will avoid setting up an expensive system configuration
  • You will be able to keep up with the rapid updates of dynamic IP addresses on the Internet
  • You will be able to append aliases/names for yourself to your domain name, e.g.
  • You will be able to access your device remotely etc.

Further reading: