All sub 1'45" performances from 2003
| # | Mark | SR | Athlete | IR | Nat | Pos | Venue | Date |
| 1 | 1.42.52 | 1 | Wilfred Bungei | | KEN | 1 | Bruxelles | 05-09-2003 |
| 2 | 1.42.89 | 2 | Mbulaeni Mulaudzi | | RSA | 2 | Bruxelles | 05-09-2003 |
| 3 | 1.43.05 | | Wilfred Bungei | 2 | KEN | 1 | Hengelo | 01-06-2003 |
| 4 | 1.43.12 | 3 | Hezekiél Sepeng | | RSA | 3 | Bruxelles | 05-09-2003 |
| 5 | 1.43.24 | | Wilfred Bungei | 3 | KEN | 1 | Ostrava | 12-06-2003 |
| 6 | 1.43.25 | | Mbulaeni Mulaudzi | 2 | RSA | 1 | Rehlingen | 09-06-2003 |
| 7 | 1.43.28 | 4 | Wilson Kipketer | | DEN | 4 | Bruxelles | 05-09-2003 |
| 8 | 1.43.52 | 5 | Joseph Mutua | | KEN | 5 | Bruxelles | 05-09-2003 |
| 9 | 1.43.62 | | Wilfred Bungei | 4 | KEN | 1 | Sevilla | 07-06-2003 |
| 10 | 1.43.68 | 6 | Yuriy Borzakovskiy | | RUS | 6 | Bruxelles | 05-09-2003 |
| 11 | 1.43.71 | 7 | Japheth Kimutai | | KEN | 1 | Nairobi | 26-07-2003 |
| 12 | 1.43.93 | | Yuriy Borzakovskiy | 2 | RUS | 2 | Sevilla | 07-06-2003 |
| 13 | 1.43.94 | | Yuriy Borzakovskiy | 3 | RUS | 1 | Paris | 04-07-2003 |
| 14 | 1.43.97 | | Yuriy Borzakovskiy | 4 | RUS | 1 | Trikala | 24-06-2003 |
| 15 | 1.44.00 | | Mbulaeni Mulaudzi | 3 | RSA | 1 | Roma | 11-07-2003 |
| 16 | 1.44.04 | | Joseph Mutua | 2 | KEN | 1 | Ajuba | 17-05-2003 |
| 17 | 1.44.11 | | Mbulaeni Mulaudzi | 4 | RSA | 1 | Oslo | 27-06-2003 |
| 18 | 1.44.12 | | Mbulaeni Mulaudzi | 5 | RSA | 2 | Paris | 04-07-2003 |
| 19 | 1.44.12 | | Mbulaeni Mulaudzi | 6 | RSA | 1/A | Zürich | 15-08-2003 |
| 20 | 1.44.15 | | Wilfred Bungei | 5 | KEN | 2 | Oslo | 27-06-2003 |
| 21 | 1.44.16 | 8 | Justus Koech | | KEN | 2 | Nairobi | 26-07-2003 |
| 22 | 1.44.17 | 9 | Mehdi Baala | | FRA | 1 | Villeneuve d'Ascq | 15-06-2003 |
| 23 | 1.44.18 | | Hezekiél Sepeng | 2 | RSA | 3 | Sevilla | 07-06-2003 |
| 24 | 1.44.19 | | Mbulaeni Mulaudzi | 7 | RSA | 2 | Villeneuve d'Ascq | 15-06-2003 |
| 25 | 1.44.21 | | Hezekiél Sepeng | 3 | RSA | 2 | Roma | 11-07-2003 |
| 26 | 1.44.21 | | Joseph Mutua | 3 | KEN | 1 | Heusden | 02-08-2003 |
| 27 | 1.44.22 | 10 | Bram Som | | NED | 4 | Sevilla | 07-06-2003 |
| 28 | 1.44.23 | 11 | André Bucher | | SUI | 7 | Bruxelles | 05-09-2003 |
| 29 | 1.44.25 | | André Bucher | 2 | SUI | 3 | Paris | 04-07-2003 |
| 30 | 1.44.26 | | Hezekiél Sepeng | 4 | RSA | 2/A | Zürich | 15-08-2003 |
| 31 | 1.44.30 | 12 | David Krummenacker | | USA | 4 | Paris | 04-07-2003 |
| 32 | 1.44.34i | | Yuriy Borzakovskiy | 5 | RUS | 1 | Stockholm (Globe) | 18-02-2003 |
| 33 | 1.44.34 | | Japheth Kimutai | 2 | KEN | 2 | Trikala | 24-06-2003 |
| 34 | 1.44.34 | 13 | Nicholas Wachira | | KEN | 3 | Nairobi | 26-07-2003 |
| 35 | 1.44.36 | | Yuriy Borzakovskiy | 6 | RUS | 2 | Ostrava | 12-06-2003 |
| 36 | 1.44.36 | | Wilson Kipketer | 2 | DEN | 3/A | Zürich | 15-08-2003 |
| 37 | 1.44.37 | 14 | Antonio Reina | | ESP | 5 | Paris | 04-07-2003 |
| 38 | 1.44.40 | | Bram Som | 2 | NED | 3 | Roma | 11-07-2003 |
| 39 | 1.44.42 | | Mbulaeni Mulaudzi | 8 | RSA | 1 | Madrid | 19-07-2003 |
| 40 | 1.44.44 | | Wilfred Bungei | 6 | KEN | 1 | Dortmund | 15-06-2003 |
| 41 | 1.44.46 | | Mehdi Baala | 2 | FRA | 4/A | Zürich | 15-08-2003 |
| 42 | 1.44.46 | | Bram Som | 3 | NED | 8 | Bruxelles | 05-09-2003 |
| 43 | 1.44.51 | | Joseph Mutua | 4 | KEN | 4 | Nairobi | 26-07-2003 |
| 44 | 1.44.53 | | Wilfred Bungei | 7 | KEN | 1 | Lausanne | 01-07-2003 |
| 45 | 1.44.53 | | Hezekiél Sepeng | 5 | RSA | 2 | Madrid | 19-07-2003 |
| 46 | 1.44.59 | | Bram Som | 4 | NED | 6 | Paris | 04-07-2003 |
| 47 | 1.44.60 | 15 | Djabir Saïd-Guerni | | ALG | 1/B | Zürich | 15-08-2003 |
| 48 | 1.44.61 | 16 | Florent Lacasse | | FRA | 1 | Torino | 06-06-2003 |
| 49 | 1.44.65 | | Antonio Reina | 2 | ESP | 3 | Oslo | 27-06-2003 |
| 50 | 1.44.66 | | Wilfred Bungei | 8 | KEN | 4 | Roma | 11-07-2003 |
| 51 | 1.44.66 | | Bram Som | 5 | NED | 5/A | Zürich | 15-08-2003 |
| 52 | 1.44.68i | | Wilson Kipketer | 3 | DEN | 2 | Stockholm (Globe) | 18-02-2003 |
| 53 | 1.44.68 | | Japheth Kimutai | 3 | KEN | 3 | Ostrava | 12-06-2003 |
| 54 | 1.44.70 | | Wilfred Bungei | 9 | KEN | 6/A | Zürich | 15-08-2003 |
| 55 | 1.44.71 | | Hezekiél Sepeng | 6 | RSA | 1 | Berlin | 10-08-2003 |
| 56 | 1.44.73 | | Hezekiél Sepeng | 7 | RSA | 7 | Paris | 04-07-2003 |
| 57 | 1.44.73 | | Wilfred Bungei | 10 | KEN | 2 | Berlin | 10-08-2003 |
| 58 | 1.44.74 | | Florent Lacasse | 2 | FRA | 2/B | Zürich | 15-08-2003 |
| 59 | 1.44.75 | 17 | Michael Rotich | | KEN | 2 | Heusden | 02-08-2003 |
| 60 | 1.44.76 | | Michael Rotich | 2 | KEN | 3/B | Zürich | 15-08-2003 |
| 61 | 1.44.77 | | Nicholas Wachira | 2 | KEN | 5 | Roma | 11-07-2003 |
| 62 | 1.44.80 | | Japheth Kimutai | 4 | KEN | 6 | Roma | 11-07-2003 |
| 63 | 1.44.81 | | André Bucher | 3 | SUI | 7 | Roma | 11-07-2003 |
| 64 | 1.44.81 | | Djabir Saïd-Guerni | 2 | ALG | 1 | Paris | 31-08-2003 |
| 65 | 1.44.82i | | Mehdi Baala | 3 | FRA | 3 | Stockholm (Globe) | 18-02-2003 |
| 66 | 1.44.83 | | Antonio Reina | 3 | ESP | 5 | Sevilla | 07-06-2003 |
| 67 | 1.44.83 | | Joseph Mutua | 5 | KEN | 7/A | Zürich | 15-08-2003 |
| 68 | 1.44.84 | | Yuriy Borzakovskiy | 7 | RUS | 2 | Paris | 31-08-2003 |
| 69 | 1.44.85 | | Michael Rotich | 3 | KEN | 3 | Trikala | 24-06-2003 |
| 70 | 1.44.85 | | Hezekiél Sepeng | 8 | RSA | 1 | Rieti | 07-09-2003 |
| 71 | 1.44.86 | | André Bucher | 4 | SUI | 2 | Lausanne | 01-07-2003 |
| 72 | 1.44.88 | | David Krummenacker | 2 | USA | 8 | Roma | 11-07-2003 |
| 73 | 1.44.90 | | Joseph Mutua | 6 | KEN | 1 | Roodepoort | 28-03-2003 |
| 74 | 1.44.90 | | Michael Rotich | 4 | KEN | 5 | Nairobi | 26-07-2003 |
| 75 | 1.44.90 | | Mbulaeni Mulaudzi | 9 | RSA | 3 | Paris | 31-08-2003 |
| 76 | 1.44.95 | 18 | Joeri Jansen | | BEL | 4 | Ostrava | 12-06-2003 |
| 77 | 1.44.95 | | Joseph Mutua | 7 | KEN | 4 | Trikala | 24-06-2003 |
| 78 | 1.44.96i | | Wilson Kipketer | 4 | DEN | 1 | Karlsruhe | 28-02-2003 |
| 79 | 1.44.96 | | Nicholas Wachira | 3 | KEN | 5 | Trikala | 24-06-2003 |
| 80 | 1.44.96 | 19 | Andrea Longo | | ITA | 2 | Rieti | 07-09-2003 |
| 81 | 1.44.97i | | Wilfred Bungei | 11 | KEN | 1 | Stuttgart (HMS-Halle) | 02-02-2003 |
| 82 | 1.44.98 | 20 | Graham Davidson | | RSA | 2 | Rehlingen | 09-06-2003 |
| 83 | 1.44.99 | | André Bucher | 5 | SUI | 4 | Oslo | 27-06-2003 |
| 84 | 1.44.99 | | Michael Rotich | 5 | KEN | 3 | Rieti | 07-09-2003 |