TelstraClear - now under Vodafone's wing - outpaced its rivals during December and offered customers the fastest web browsing speeds, according to a broadband testing service.
TrueNet measures the speed which internet companies offer their users and produces monthly reports for the public.
TelstraClear's cable service, which is only available in Wellington and Christchurch, is consistently faster than other offerings in TrueNet tests but the new Vodafone acquisition also beat out rivals in the copper-line DSL market last month, jumping up from 4th place in November.
TelstraClear, Maxnet, Slingshot, and Vodafone all loaded TrueNet's test page in under 0.5 seconds in December.
Telecom downloaded the test page in just over a second while Orcon was closer to 1.5 seconds.