Chorus says it connected a record number of homes to UFB fibre during June as the Rugby World Cup approached.
But even if it can keep up the record pace, hundreds of thousands of homes will still miss out.
The network company says it received 33,000 fibre connection orders during July and completed about 26,000 connections.
That was well up on the 27,000 orders and 22,000 fibre installations and connections completed in June.
A spokesman tells the Herald that Chorus can connect another 21,000 homes between now and the RWC opener on September 20.