| 1998 Scanner Frequencies car | Driver | Sponsors | Frequencies | 1 | Alex Zanardi | Target | 469.8875 | 461.6125 | | 2 | Al Unser Jr. | Marlboro | 854.8375 | 858.8875 | 851.0375 | 3 | Andre Ribeiro | Marlboro | 857.8375 | 852.1875 | 855.9125 | 5 | Gil de Ferran | Valvoline | 461.0625 | 463.2375 | 461.0125 | 6 | Michael Andretti | KMart/Texaco | 461.2875 | 468.3625 | 468.2250 | 7 | Bobby Rahal | Miller | 469.2625 | 468.2625 | 463.8875 | 8 | Bryan Herta | Shell | 468.7125 | 467.8375 | 462.8125 | 9 | JJ Lehto | Hogan/Universal | 461.1375 | 461.4750 | | 10 | Richie Hearn | Budweiser | 461.4875 | 461.9125 | | 11 | Christian Fittipaldi | Kmart | 461.7125 | | | 12 | Jimmy Vasser | Target | 467.0375 | 461.1125 | | 15 | Driver du Jour | Hawaiian Tropic | 466.1500 | | | 16 | Helio Castro-Neves | Alumax | 853.4875 | 857.9875 | | 17 | Mauricio Gugelmin | Hollywood | 468.4625 | 466.7625 | 462.4625 | 18 | Mark Blundell | Motorola | 466.7625 | 461.9375 | | 19 | Michel Jourdain Jr. | Herdez | 461.7375 | | | 20 | Scott Pruett | Visteon | 464.1750 | 464.0875 | | 21 | Tony Kanaan | LCI | 469.3125 | 469.2125 | | 24 | Robby Gordon | Panasonic | 461.7500 | 463.7750 | | 25 | Max Papis | MCI | 467.7500 | 467.8000 | | 26 | Paul Tracy | KOOL | 466.3250 | 467.1750 | | 27 | Dario Franchitti | KOOL | 466.5375 | 466.2625 | | 33 | Patrick Carpentier | Player's/Indek | 461.5375 | 468.3875 | | 34 | Dennis Vitolo | Smith Kline Beecham | 460.6875 | | | 36 | Alex Barron | Castrol/Degree | 464.9250 | | | 40 | Adrian Fernandez | Tecate/Quaker | 461.8875 | 463.9000 | 468.9000 | 77 | Arnd Meier | BAAN Software | 467.1875 | 464.9375 | | 98 | PJ Jones | Castrol/Degree | 463.7375 | | | 99 | Greg Moore | Player's/Indek | 466.8875 | | | | | | | | | | | | | | | | | CART 1 | 457.0125 | | | | | CART 2 | 457.1875 | | | | | CART 3 | 451.5250 | | | | | CART 4 | 451.8125 | | | | | | | | | | | ESPN spotters and | 450.2125 | 450.7125 | | | | announcers | 450.8125 | 450.9125 | | |