| Wales v Ireland Principality Stadium, Cardiff Saturday, 4 February, 2023 |
Referee: Karl Dickson (RFU) |
| England v Scotland Twickenham Stadium, London Saturday, 4 February, 2023 |
Referee: Paul Williams (NZR) Assistant Referee 1: Ben O'Keeffe (NZR) Assistant Referee 2: James Doleman (NZR) TMO: Brendon Pickerill (NZR) |
| Italy v France Stadio Olimpico, Rome Sunday, 5 February, 2023 |
Referee: Matthew Carley (RFU) Assistant Referee 1: Nic Berry (RA) Assistant Referee 2: Jordan Way (RA) TMO: Ben Whitehouse (WRU) |
|
Ireland v France |
Referee: Wayne Barnes (RFU) Assistant Referee 1: Matthew Carley (RFU) Assistant Referee 2: Jordan Way (RA) TMO: Brendon Pickerill (NZR) |
| Scotland v Wales BT Murrayfield, Edinburgh Saturday, 11 February, 2023 |
Referee: Andrew Brace (IRFU) Assistant Referee 1: Frank Murphy (IRFU) Assistant Referee 2: Chris Busby (IRFU) TMO: Brian MacNeice (IRFU) |
| England v Italy Twickenham Stadium, London Sunday, 12 February, 2023 |
Referee: James Doleman (NZR) Assistant Referee 1: Mathieu Raynal (FFR) Assistant Referee 2: Tual Trainini (FFR) TMO: Eric Gauzins (FFR) |
| Italy v Ireland Stadio Olimpico, Rome Saturday, 25 February, 2023 |
Referee: Mike Adamson (SRU) Assistant Referee 1: Wayne Barnes (RFU) Assistant Referee 2: Craig Evans (WRU) TMO: Marius Jonker (SARU) |
| Wales v England Principality Stadium, Cardiff Saturday, 25 February, 2023 |
Referee: Mathieu Raynal (FFR) Assistant Referee 1: Andrew Brace (IRFU) Assistant Referee 2: Chris Busby (IRFU) TMO: Brian MacNeice (IRFU) |
| France v Scotland Stade de France, Paris Sunday, 26 February, 2023 |
Referee: Nika Amashukeli (GRU) Assistant Referee 1: Karl Dickson (RFU) Assistant Referee 2: Andrea Piardi (FIR) TMO: Ben Whitehouse (WRU) |
| Italy v Wales Stadio Olimpico, Rome Satuday, 11 March, 2023 |
Referee: Damon Murphy (RA) Assistant Referee 1: Karl Dickson (RFU) Assistant Referee 2: Chris Busby (IRFU) TMO: Joy Neville (IRFU) |
| England v France Twickenham Stadium, London Saturday, 11 March, 2023 |
Referee: Ben O'Keeffe (NZR) Assistant Referee 1: Jaco Peyper (SARU) Assistant Referee 2: Andrea Piardi (FIR) TMO: Brett Cronan (RA) |
| Scotland v Ireland BT Murrayfield, Edinburgh Sunday, 12 March, 2023 |
Referee: Luke Pearce (RFU) Assistant Referee 1: Wayne Barnes (RFU) Assistant Referee 2: Christophe Ridley (FFR) TMO: Stuart Terheege (RFU) |
| Scotland v Italy BT Murrayfield, Edinburgh Saturday, 18 March, 2023 |
Referee: Angus Gardner (RA) Assistant Referee 1: Matthew Carley (RFU) Assistant Referee 2: Craig Evans (WRU) TMO: Brett Cronan |
| France v Wales Stade de France, Paris Saturday, 18 March, 2023 |
Referee: Nic Berry (RA) Assistant Referee 1: Andrew Brace (IRFU) Assistant Referee 2: Christophe Ridley (FFR) TMO: Joy Neville (IRFU) |
| Ireland v England Aviva Stadium, Dublin Saturday, 18 March, 2023 |
Referee: Jaco Peyper (SARU) Assistant Referee 1: Ben O'Keeffe (NZR) Assistant Referee 2: Pierre Brousset (FFR) TMO: Marius Jonker (SARU) |