I don't know which providers have spots, but you can find providers by zip code and check their licensing inspection history here:
https://www.checkccmd.org/
Also, the Maryland Family Network has a child care search tool that has information on prices for some (but not all providers). Also you can see the providers on a map which is helpful. You don't need an account, just enter your e-mail on the login page.
https://www.marylandfamilynetwork.org/for-parents/locate-child-care?gclid=Cj0KCQiAs5eCBhCBARIsAEhk4r7maA1brnDbQPt3unHqSF83_uMzPV-xV2-BpzqKzH8FZzid2ihs3cMaAv42EALw_wcB