Too tall to ride Specialized?

i'm confused on the sizes that specialized bikes will accommodate. i'm
6'6" and currently ride a trek that's 25" and it's time for an upgrade.
Is XL the biggest Specialzed goes and also i'm wondering if that will
fit me properly. one last thing, what numbers (ex. 20.5, 21, 20)
actually fit under the catergory of xl? thanks for your time

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