Referee: Abdulrahman Al Jassim (QAT, 1987)
Assistant Referee 1: Taleb Al Marri (QAT, 1988)
Assistant Referee 2: Saoud Al Maqaleh (QAT, 1988)
Referee: Fahad Al Mirdasi (KSA, 1985, photo)
Assistant Referee 1: Abdulah Al Shalwai (KSA, 1975)
Assistant Referee 2: Mohammed Al Abakry (KSA, 1980)
Referee: Alireza Faghani (IRN, 1978)
Assistant Referee 1: Reza Sokhandan (IRN, 1974)
Assistant Referee 2: Mohammadreza Mansouri (IRN, 1978)
Referee: Ravshan Irmatov (UZB, 1977)
Assistant Referee 1: Abduxamidullo Rasulov (UZB, 1976)
Assistant Referee 2: Jakhongir Saidov (UZB, 1979)
Referee: Abdulla Mohamed (EAU, 1978)
Assistant Referee 1: Mohamed Al-Hammadi (EAU, 1984)
Assistant Referee 2: Hasan Al-Mahri (EAU, 1978)
Referee: Ryuji Sato (JPN, 1977)
Assistant Referee 1: Toru Sagara (JPN, 1976)
Assistant Referee 2: Hiroshi Yamauchi (JPN, 1979)
Referee: Nawaf Shukralla (BHR, 1976)
Assistant Referee 1: Yaser Abdulla (BHR, 1974)
Assistant Referee 2: Ebrahim Saleh (BHR, 1974)
Reserve Referees
1. Muhammad Bin Jahari (SIN, 1986)
2. Mohd Bin Yaacob (MAS, 1986)
3. Jong Hyeok Kim (KOR, 1983)
CAF (7)
Referee: Mehdi Abid Charef (ALG, 1980)
Assistant Referee 1: Abdelhak Etchiali (ALG, 1981)
Assistant Referee 2: Anouar Hmila (TUN, 1974)
Referee: Alioum Alioum (CMR, 1982)
Assistant Referee 1: Evarist Menkouande (CMR, 1974)
Assistant Referee 1: Elvis Noupue (CMR, 1983)
Referee: Bernard Camille (SEY, 1975)
Assistant Referee 1: Zakhele Siwela (RSA, 1982)
Assistant Referee 2: Theogene Ndagijimana (RWA, 1978)
Referee: Malang Diedhiou (SEN, 1973)
Assistant Referee 1: Djibril Camara (SEN, 1983)
Assistant Referee 2: El Hadji Samba (SEN, 1979)
Referee: Bakary Gassama (GAM, 1979)
Assistant Referee 1: Jean Birumushahu (BDI, 1972)
Assistant Referee 2: Marwa Range (KEN, 1977)
Referee: Ghead Grisha (EGY, 1976)
Assistant Referee 1: Redouane Achik (MAR, 1972)
Assistant Referee 2: Waleed Ahmed (SDN, 1974)
Referee: Janny Sikazwe (ZAM, 1979)
Assistant Referee 1: Jerson Dos Santos (ANG, 1983)
Assistant Referee 2: Berhe Tesfagiorghis (ERI, 1975)
Reserve Referees
1. Joseph Lamptey (GHA, 1974)
2. Eric Otogo Castane (GAB, 1976)
3. Bamlak Tessema (ETH, 1980)
CONCACAF (7)
1. Joel Aguilar (SLV, 1975)
2. Roberto Garcia (MEX, 1974)
3. Mark Geiger (USA, 1974)
4. Walter Lopez (GUA, 1980)
5. Ricardo Montero (CRC, 1986)
6. John Pitti (PAN, 1978)
7. Cesar Ramos (MEX, 1983)
Reserve Referees
1. Armando Castro (HON, 1983)
2. Valdin Legister (JAM, 1979)
3. Yadel Martinez (CUB, 1985)
CONMEBOL (10)
Referee: Jose Argote (VEN, 1980)
Assistant Referee 1: Luis Murillo (VEN, 1976)
Assistant Referee 2: Carlos Lopez (VEN, 1982)
Referee: Enrique Caceres (PAR, 1974)
Assistant Referee 1: Eduardo Cardozo (PAR, 1982)
Assistant Referee 2: Juan Zorrilla (PAR, 1975)
Referee: Andres Cunha (URU, 1976)
Assistant Referee 1: Nicolas Taran (URU, 1980)
Assistant Referee 2: Mauricio Espinosa (URU, 1972)
Referee: Diego Haro (PER, 1982)
Assistant Referee 1: Jonny Bossio (PER, 1975)
Assistant Referee 2: Raul Lopez (PER, 1977)
Referee: Enrique Osses (CHI, 1974)
Assistant Referee 1: Carlos Astroza (CHI, 1976)
Assistant Referee 2: Christian Schiemann (CHI, 1977)
Referee: Nestor Pitana (ARG, 1975)
Assistant Referee 1: Hernan Maidana (ARG, 1972)
Assistant Referee 2: Juan Belatti (ARG, 1979)
Referee: Sandro Ricci (BRA, 1974)
Assistant Referee 1: Emerson De Carvalho (BRA, 1972)
Assistant Referee 2: Marcelo Van Gasse (BRA, 1976)
Referee: Wilmar Roldan (COL, 1980)
Assistant Referee 1: Alexander Guzman (COL, 1985)
Assistant Referee 2: Cristian De La Cruz (COL, 1978)
Referee: Gery Vargas (BOL, 1981)
Assistant Referee 1: Juan Montano (BOL, 1988)
Assistant Referee 2: Javier Bustillos (BOL, 1976)
Referee: Roddy Zambrano (ECU, 1978)
Assistant Referee 1: Christian Lescano (ECU, 1983)
Assistant Referee 2: Byron Romero (ECU, 1980)
Reserve Referees
1. Julio Bascunan (CHI, 1978)
2. Daniel Fedorczuk (URU, 1976)
3. Wilson Lamouroux (COL, 1979)
4. Wilton Sampaio (BRA, 1981)
5. Mauro Vigliano (ARG, 1975)
OFC (2)
Referee: Matthew Conger (NZL, 1978)
Assistant Referee 1: Simon Lount (NZL, 1981)
Assistant Referee 2: Tevita Makasini (TGA, 1976)
Referee: Norbert Hauata (TAH, 1979)
Assistant Referee 1: Ravenish Kumar (FIJ, 1982)
Assistant Referee 2: Philippe Revel (TAH, 1982)
Reserve Referees
1. Ravitesh Behari (FIJ, 1981)
2. Nicholas Waldron (NZL, 1982)
3. Abdelkader Zitouni (TAH, 1981)
According to this updated list, the cut-off birth year is 1972, which means that, if selected, those match officials will be 46 at the World Cup in 2018.
All pre-selected referees will be attending FIFA Elite courses: AFC, CAF and OFC in Doha, Qatar (11-15 April 2016), CONCACAF and CONMEBOL in Miami, USA (25-29 April 2016), The assistant referees courses are scheduled for 9-13 May 2016 in Asuncion (CONMEBOL and CONCACAF), 23-27 May 2016 in Agadir, Morocco (AFC, CAF and OFC). The UEFA courses and participants will be announced later.
Source: Arbitro Internacional