Can I use a handheld router in a router table?

Yes, and most mid-size routers like the Bosch 1617 and DeWalt DW618 are specifically designed for both handheld and table use. Reviewers across forums note that the fixed base is what mounts to the table, and above-table height adjustment varies by model. Check that the model you pick is compatible with the router table or lift you plan to use.