I’ve been dealing with the same thing, and after several long nights googling and comparing my own orders, I figured out a few things. Basically, the tracking numbers vary because AliExpress Standard Shipping isn't a courier itself—it's more like an umbrella service that partners with local couriers in China and destination countries. So the prefix depends on which logistics provider they assign. For example, “LP” numbers are usually handled by Cainiao, while “YANW” ones are often Yanwen Logistics. Once they hand the parcel over to another courier for international transit, the tracking might go inactive for a while—super annoying, I know.
If you want to dig deeper or check the origin of the tracking code, this tool actually helped me a ton:
china tracking. You can plug in your number there and sometimes get updates even before they appear on AliExpress. It also shows you which courier is handling it in China, which is helpful when your package feels “lost” in the black hole of shipping. Hope this clears it up a bit!