My first thought is that the number is being spoofed.
There is a forum thread with a related title: http://800notes.com/forum/ta-698f703f1736975/spam-text-from-a-landline.
I haven't read all the posts in it but perhaps there is some useful info there.
Has anyone heard of a landline being able to send sms? cause this number has been able to through the phone app called WhatsApp. any information on this would be helpful, thank you.
My first thought is that the number is being spoofed.
There is a forum thread with a related title: http://800notes.com/forum/ta-698f703f1736975/spam-text-from-a-landline.
I haven't read all the posts in it but perhaps there is some useful info there.