North Korea is moving ahead with its ballistic missile program at 16 hidden bases that have been identified in new commercial satellite images, a network long known to American intelligence agencies but left undiscussed as President Trump claims to have neutralized the North’s nuclear threat.

The satellite images suggest that the North has been engaged in a great deception: It has offered to dismantle a major launching site — a step it began, then halted — while continuing to make improvements at more than a dozen others that would bolster launches of conventional and nuclear warheads.

The existence of the ballistic missile bases, which North Korea has never acknowledged, contradicts Mr. Trump’s assertion that his landmark diplomacy is leading to the elimination of a nuclear and missile program that the North had warned could devastate the United States.