Arrange a rack in the center of the oven; preheat to 375°.
In a large bowl, whisk cream cheese, sour cream, lime juice, chipotle powder, and cumin until smooth; season with salt.
Stir in drained corn, jalapeño, scallions, garlic, cilantro, and 1 cup Pepper Jack or Monterey Jack cheese.
Transfer corn mixture to a medium baking dish or cast-iron skillet.
Sprinkle with remaining 1/4 cup Monterey Jack.
Bake dip until golden and bubbly, 25 to 30 minutes.
Serve with tortilla chips.