Any numbers that aren't decimal are pronounced digit by digit, whether it's binary, octal, hexadecimal or some other crazy shit. So, yeah, it's either "one-zero" or "one-oh".
EDIT: Actually, the best thing to do would be to explicitly state which base the number is in, such as "binary six" or "one-one-zero in binary" for 110, since 110 could also mean "octal seventy-two". But usually you know which base the other person is talking about from context.
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