Welsh homes and businesses in another 66 locations will gain access to fibre broadband by June 2015, it has been announced.
Upgrades will be carried out across ten local authority areas as part of the SuperfastCymru scheme: Carmarthenshire, Conwy, Ceredigion, Denbighshire, Monmouthshire, Pembrokeshire, Powys, Powys, Rhondda Cynon Taf and Wrexham.
The programme is working to deliver super-fast broadband to 96 per cent of the Welsh population by spring 2016.
Upgrades will be carried out earlier than expected at 35 BT telephone exchanges, beginning in the spring.
Once this phase of the rollout is complete, approximately half a million premises will be able to connect to super-fast broadband. This equates to around 75 per cent of the country.
Ed Hunt, BT Programme Director for Superfast Cymru, said "great progress" is being made, with 5,000 premises per week set to gain fibre broadband between now and the end of March 2015.
"Through this programme, we expect to reach close to half a million premises by summer 2015 with a year still to go," he stated.
"That’s nearly a third of all homes and businesses in Wales, and three-quarters when combined with BT’s own commercial rollout."