Not impossible they do something like just name it after the time stamp and add some random digits - I’ve seen exactly this at a telco. “What about collisions?”

Not impossible they do something like just name it after the time stamp and add some random digits - I’ve seen exactly this at a telco. “What about collisions?” “We’ll add another digit if it’s a problem.” So maybe it’s now a problem. Although with decreasing MMS volume you’d think not.