The IMEI is potentially useful as it’s a device identifier, but generally doesn’t matter to anyone except your carrier.
On that note; the carrier may be able to tell you when that IMEI first became associated with your phone plan. My phone plan long pre-dates the last like 6 devices I’ve had so they’d have that history for many of them.
That’s not a database you can search whenever you’d like though; that’s a call and ask nicely.