Cooper & Dunham LLP

White-collar firms have occupied Rockefeller Center for decades, and the twentieth floor still houses Cooper & Dunham LLP, a fixture in the building’s legal quarter. Practice areas run from antitrust litigation to intellectual-property disputes, with trade regulation and securities work rounding out the slate. Corporate governance and class-action defense clients often find themselves just down the hall from the elevators. International arbitration filings wind up here as well, handled by attorneys who focus on cross-border discovery and enforcement.

The firm’s listed address reads 30 Rockefeller Plaza, 20th floor, New York, NY 10112—a building most visitors recognize by the annual Christmas tree rather than the directory on the wall. Nearby are midtown subway stops at 47th–49th Streets and Sixth Avenue, making the commute straightforward. Corporate shuttle routes also loop past this corner, so late-night filings rarely hinge on parking tickets.

Reach the front desk by calling (212) 278-0400—area code 212 still tells dispatchers you’ve arrived in Manhattan. Reception can direct calls to associates who specialize in ERISA benefits, export-control licensing, or qui tam whistleblower claims. Press zero for the operator if you need a direct extension.

Save the map and drop a pin before you leave: directions keep you from circling the block twice. The plaza’s underground concourse can shave a few blocks off a midtown trek.