How to tell if an iMessage was sent to a landline

RalphTomaccio Said:

"How to tell if an iMessage was sent to a landline: If I send a message thinking that the number is a cell phone but, instead is a land line, is there any way to tell? Also, if the message says “delivered”, is it safe to assume it is definitely a cell phone number? Thanks!"

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Texting to a Landline:

You'll get an error message, because you are routing a cellular message to a landline.