u/Civil-Cheetah4087

I have an iPad 10th generation that had a phone number with Spectrum. I canceled Spectrum and wanted to get cellular data with another service but they say I need an IMEI number. I can’t find it anywhere, nor can I find a sim card slot. Would Spectrum have it? Or does that mean the iPad is cellular only? And if so how did Spectrum get a phone number on it? Would I be able to find another company that can put cellular data on it?