Coventry, Edinburgh, Huddersfield and Stirling have been lined up in the latest phase of the full fibre infrastructure build being advanced by Vodafone and CityFibre.
The announcement brings CityFibre's committed infrastructure investment in the project to at least £315m; while the total number of homes and businesses identified to date is over half a million premises across seven cities.
Vodafone will use CityFibre's network to bring Vodafone Gigafast Broadband to customers.
Greg Mesch, Chief Executive at CityFibre, said: "Behind each city project announced lies concrete plans, advanced network designs and the resources to mobilise construction.
"We also have a significant head-start, harnessing our existing duct infrastructure that is tailor-made for city-wide FTTP expansion.
"Our commitment in partnership with Vodafone is to totally transform each city in which we roll-out by bringing ubiquitous full fibre to everyone, and we are well on our way."