Most phone services affected by yesterday's earthquake have now been fixed, Vodafone says.

"There is only one remaining cell site that we are working to reinstate," a spokeswoman said.

"The site in Waiau will be connected tomorrow to a temporary femtocell over satellite link to provide temporary coverage for people in this area."

Meanwhile, Downer has started work to assess the extent of the damage to the fibre cable that runs along SH1 in Kaikoura.

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Teams are also working to restore most broadband and mobile services for Kaikoura customers by using an undersea fibre optic cable that links between the North and South Islands and comes ashore just outside of Kaikoura for a power boost.

"The severe weather and continued aftershocks have presented additional challenges for us in Wellington," the spokeswoman said.

"Some customers in the suburbs of Karori and Kelburn may be experiencing a loss of fixed line services. We are working to restore these as quickly as possible."