There are no national sportsbooks because sports betting is legalized on a state-by-state basis, with each having its own set of rules. Having said that, there are sportsbooks which work in multiple states and may become available in the vast majority of the country as even more states have legalized sports wagering.
BetMGM, best known for its sportsbook at the MGM Grand in Las Vegas, has been exposed across the nation, with physical place in New York, Mississippi, Michigan, and Pennsylvania, as well as online sites in Colorado, Indiana, Nevada, New Jersey, and West Virginia. In eligible states, use the BetMGM bonus code to sign up for a welcome bonus.
Now since PASPA had been abolished in 2018, DraftKings expanded rapidly all over the region with physical online offerings and sportsbooks. Mobile and retail sports betting are permitted in Colorado, Illinois, Indiana, Iowa, New Jersey, Pennsylvania, and West Virginia through DraftKings. New York and Mississippi have legalized retail sports betting. Only mobile is available in New Hampshire, where DraftKings has a monopoly. In eligible states, enter the DraftKings promo code to receive a welcome offer.
In terms of availability, FanDuel lags behind DraftKings, but this varies by month. Colorado, Indiana, Iowa, New Jersey, Pennsylvania, and West Virginia allow both mobile and retail sports betting. In Michigan and New York, only retail wagering is available. New players can use the FanDuel promo code to get a no-risk first bet or other sign-up bonuses.