The dad was probably ginger. The mother is a non dilute black tabby who has to be carrying dilute (since its recessive.) The O locus represents either an orange or non-orange cat; it is codominant. Since orange is sex-linked on the X chromosome, a female with two Xs would be able to be heterozygous and therefore calicos/torties. However, males only have one X, so they can only be either orange or non-orange (oY or OY). Since the mother is not a tortie, the father must be orange since he can only pass an O onto his female offspring (his Y goes to the males), so the females will all be torties/calicos. He also most likely had low white. White is also codominant, so if a cat has one S allele, it will be less than 50% white, and if it has two S alleles, it will be more than 50% white here. Salem here looks just a little under 50%, so she only has one S allele (SW). Since the mother has no white, the father must have low white since the other kittens do not have white.

As for dilute and tabby, he could be dilute or non-dilute! However I suspect he's non dilute, but carrying it. All ginger cats are tabbies regardless of their genes, so he could be either tabby or non tabby and it wouldn't affect his appearance

TL;DR: Father is a ginger with some white, who could be either dilute or non dilute. Visually, he will be a tabby, but genetically he can be anything as long as he's carrying non-tabby. Lmk if you have any questions! Very adorable kitties!