Wales v Ireland
Stadiwm CSM, Colwyn Bay
Friday, 3 February, 2023		 Referee: Luc Ramos (FFR)
Assistant Referee 1: Ben Blain (SRU)
Assistant Referee 2: Benoit Rousselet (FFR)
TMO: Thomas Charabas (FFR)
England v Scotland
The Stoop, Twickenham
Friday, 3 February, 2023		 Referee: Angus Mabey (NZR)
Assistant Referee 1: Ben Breakspear (WRU)
Assistant Referee 2: Federico Vedovelli (FIR)
TMO: Sean Brickell (WRU)
Italy v France
Stadio Monigo, Treviso
Friday, 3 February, 2023		 Referee: Reuben Keane (RA)
Assistant Referee 1: Eoghan Cross (IRFU)
Assistant Referee 2: Anthony Woodthorpe (RFU)
TMO: Ian Tempest (RFU)
Ireland v France
Musgrave Park, Cork
Friday, 10 February, 2023		 Referee: Angus Mabey (NZR)
Assistant Referee 1: Anthony Woodthorpe (RFU)
Assistant Referee 2: Ben Blain (SRU)
TMO: David Rose (RFU)
Scotland v Wales
Scotstoun Stadium, Glasgow
Friday, 10 February, 2023		 Referee: Reuben Keane (RA)
Assistant Referee 1: Eoghan Cross (IRFU)
Assistant Referee 2: Federico Vedovelli (FIR)
TMO: Thomas Charabas (FFR)
England v Italy
Kingsholm Stadium, Gloucester
Friday, 10 February, 2023		 Referee: Ben Breakspear (WRU)
Assistant Referee 1: Luc Ramos (FFR)
Assistant Referee 2: Steffan Edwards (WRU)
TMO: Sean Brickell (WRU)
Italy v Ireland
Stadio Monigo, Treviso
Friday, 24 February, 2023		 Referee: Hollie Davidson (SRU)
Assistant Referee 1: Ian Kenny (SRU)
Assistant Referee 2: Luc Ramos (FFR)
TMO: Ben Blain (SRU)
Wales v England
Stadiwm CSM, Colwyn Bay
Friday, 24 February, 2023		 Referee: Eoghan Cross (IRFU)
Assistant Referee 1: Chris Busby (IRFU)
Assistant Referee 2: Peter Martin (IRFU)
TMO: Joy Neville (IRFU)
France v Scotland
Stade Armandie, Agen
Friday, 24 February, 2023		 Referee: Federico Vedovelli (FIR)
Assistant Referee 1: Filippo Russo (FIR)
Assistant Referee 2: Alex Frasson (FIR)
TMO: Stefano Roscini (FIR)
Italy v Wales
Stadio Monigo, Treviso
Friday, 10 March, 2023		 Referee: Anthony Woodthorpe (RFU)
Assistant Referee 1: Adam Leal (RFU)
Assistant Referee 2: Morné Ferreira (SARU)
TMO: Ian Tempest (RFU)
England v France
The Recreation Ground, Bath
Friday, 10 March, 2023		 Referee: Hollie Davidson (SRU)
Assistant Referee 1: Sam Grove-White (SRU)
Assistant Referee 2: Adriaan Jacobson (SARU)
TMO: Ben Blain (SRU)
Scotland v Ireland
Scotstoun Stadium, Glasgow
Friday, 10 March, 2023		 Referee: Takehito Namekawa (JRFU)
Assistant Referee 1:  Damian Schneider (UAR)
Assistant Referee 2: Ben Breakspear (WRU)
TMO: Ben Whitehouse (WRU)
Scotland v Italy
Scotstoun Stadium, Glasgow
Sunday, 19 March, 2023		 Referee: Morné Ferreira (SARU)
Assistant Referee 1: Eoghan Cross (IRFU)
Assistant Referee 2: Takehito Namekawa (JRFU)
TMO: David Rose (RFU)
Ireland v England
Musgrave Park, Cork
Sunday, 19 March, 2023		 Referee: Adriaan Jacobs (SARU)
Assistant Referee 1: Hollie Davidson (SRU)
Assistant Referee 2: Luc Ramos (FFR)
TMO: Marius van der Westhuizen (SARU)
France v Wales
Stade Charles Mathon, Oyonnax
Sunday, 19 March, 2023		 Referee: Damian Schneider (UAR)
Assistant Referee 1: Anthony Woodthorpe (RFU)
Assistant Referee 2: Filippo Russo (FIR)
TMO: Matteo Liperini (FIR)