Census bureau stats as of 2010 say the majority of black-white intermarried couples are clustered from Baltimore to Richmond, but of course things may have changed in the past decade. Other hotspots are Chicago, Atlanta, Savannah, Norfolk—and basically the larger cities across the states. Intermarriage with Hispanics is a big thing in the western states. See page 10 for locations of black-white marriages:
https://www.census.gov/content/dam/Census/library/working-papers/2013/demo/2013-19.pdf
When Americans think of “Hispanics” or say someone “looks Hispanic” they are talking about mestizos.
“Hispanics” out west tend to live in neighborhoods with whites, unless they are recent immigrants, something I’ve noticed in my travels out there.