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A new internet domain that hopes to become an online equivalent to the phone directory has gone on sale for the first time.

The new .tel domain allows companies and individuals to create a virtual address book, storing a variety of contact information online and offering it to users according to where they are and how they connect to the service.

To apply for your .tel domain name with a 20% discount use the voucher code TEL20 when you order at EuroDNS.

"The launch of .tel represents the most significant innovation in the domain name system since the advent of .com," said Khashr Mahdavi, chief executive of Telnic, the UK-based company that is overseeing the rollout.

On February 3, domains will go on general sale on a first-come, first-served basis.

To apply for your .tel domain name with a 20% discount use the voucher code TEL20 when you order at EuroDNS.

Although a number of other top-level domains have come online in recent years, including .eu and .mobi, those behind the new service say that it is different because it offers a radical departure from traditional web addresses.

Unlike normal URLs, which point to websites stored on local servers around the world, .tel addresses return only information stored on the internet's core Domain Name Servers (DNS).

According to Telnic, this can include phone numbers, email contacts, GPS coordinates and more.

To qualify for a 20% discount on a .tel Domain Name Registration, order your Domain Registrations as normal at EuroDNS and at the checkout enter the following codes: TEL20 .