| # | Code | Institution | Country | Contact Person | Method Description |
| 1 | ARIZ | University of Arizona |  United States (USA) | Michael Garay | Monte Carlo |
| 2 | COLS | Colorado State University | United States (USA) | Philip Partain | Monte Carlo |
| 3 | IAOT | Institute of Atmospheric Optics |  Russia (RU) | Tatiana B. Zhuravleva | Monte Carlo |
| 4 | KIAE1 | Kurchatov Institute | Russia (RU) | Alexei Rublev | Monte Carlo |
| 5 | KIAE2 | Kurchatov Institute | Russia (RU) | Alexei Rublev | Monte Carlo using Conjugated Adjoint RT equation |
| 6 | LANL1 | Los Alamos National Laboratory | United States (USA) | Anthony Davis | TWODANT (Diffusion-Accelerated Discrete Ordinates) |
| 7 | LANL2 | Los Alamos National Laboratory | United States (USA) | Anthony Davis | Discrete Angles (6-beam model, using Monte Carlo) |
| 8 | LANL3 | Los Alamos National Laboratory | United States (USA) | Anthony Davis | ED3D (Delta-Eddington Model in 3D, code by Zheng Qu) |
| 9 | MESC1 | Meteorological Service Of Canada |  Canada (CN) | Howard Barker | Monte Carlo |
| 10 | MESC2 | Meteorological Service Of Canada | Canada (CN) | Howard Barker | Monte Carlo, Delta-scaled Optical Properties |
| 11 | DZLR | formerly NCAR, now DLR |  Germany (DE) | Bernhard Mayer | Monte Carlo, libRadtran |
| 12 | PENN | The Pennsylvania State University | United States (USA) | Eugene Clothiaux | Monte Carlo, Max. Cross Section |
| 13 | PNNL | Pacific Northwest National Laboratory | United States (USA) | Evgueni Kassianov | Monte Carlo, Max. Cross Section |
| 14 | UCOL1 | University of Colorado | United States (USA) | Franklin Evans | (SHDOM), Low Resolution |
| 15 | UCOL2 | University of Colorado | United States (USA) | Franklin Evans | (SHDOM), High Resolution |
| 16 | UCSB | University of California Santa Barbara | United States (USA) | William O'Hirok | Monte Carlo |
| 17 | UMBC1 | University of Maryland Baltimore County | United States (USA) | Alexander Marshak | Monte Carlo, Local Max. Cross Section |
| 18 | UMBC2 | University of Maryland Baltimore County | United States (USA) | Tamas Varnai | Monte Carlo, Max. Cross Section |
| 19 | UMBC3 | University of Maryland Baltimore County | United States (USA) | Stefan Kinne | Monte Carlo |
| 20 | UMBC4 | University of Maryland Baltimore County | United States (USA) | Stefan Kinne | Discrete Angles (6-beam model, using relaxation) |
| 21 | UNIK | University of Kiel | Germany (DE) | Andreas Macke | Monte Carlo |
| 22 | CSES | University of Colorado | United States (USA) | Zheng Qu | Diffusion, Finite Differences, Multi-Grid = "ED3D" |
| 23 | ICOM | Institute of computational Mathematics | Russia (RU) | Sergei Prigarin | Monte Carlo |
| 24 | IMCL | Imperial College of London |  United Kingdom (UK) | Natasha Trasi | Adapted EVEN-parity Neutron Transport (EVENT) code |
| 25 | LANL4 | Los Alamos National Laboratory | United States (USA) | Anthony Davis | Diffusion, Finite Elements with PDE2D Solver |
| 26 | LANL5 | Los Alamos National Laboratory | United States (USA) | Anthony Davis | Discrete-angle, 2nd-order, Finite Elements with PDE2D Solver |
| 27 | LANL6 | Los Alamos National Laboratory | United States (USA) | Charles Rohde | Diffusion, Finite Elements with FlexPDE Solver |
| 28 | LANL7 | Los Alamos National Laboratory | United States (USA) | Charles Rohde | Discrete-angle, 2nd-order, Finite Elements with FlexPDE Solver |
| 29 | UCLA | University of California at Los Angeles | United States (USA) | Yu Gu | Diffusion, Finite Differences, Over-relaxation |
| 30 | UCOL3 | University of Colorado | United States (USA) | Franklin Evans | Quasi-diffusion, with SHDOM truncated at L=1 |
| 31 | UMBC5 | University of Maryland Baltimore County | United States (USA) | Tamas Varnai | Backward Monte Carlo |
| 32 | UNBP | Universite Blaise Pascal |  France (FR) | F. Szczap | Neural networks |
| 33 | UMCP | University of Maryland College Park | United States (USA) | Ezra Takara | Monte Carlo |
