This is very important to telephony providers who are mandated to maintain high Quality of Service standards.

It was the parent company of Vodafone, before the mobile telephony provider was sold in 1991.

Scarlet was established in the Netherlands in 1992 as an independent ISP and telephony provider.

The company has been active in Belgium since 1997 as an independent ISP and telephony provider.

It is the largest provider of fixed telephony and fourth largest mobile telephony provider in India, and is also a provider of broadband services.

As of 2012, Verizon Communications is the second-largest fixed telephony provider in the United States.

Q-Telecom was the fourth mobile telephony provider in Greece.

We encourage customers to also report availability issues of the 0303 number to their own telephony providers.

In August 2009, Scailex purchased the controlling share in Partner Communications, one of Israel's leading cellular telephony providers.

For charging and dialing reasons, these numbers appear to belong to Romtelecom to all other telephony providers.