https://fixyourandroid.com/fix/number-you-have-dialed-is-unallocated/
Number you have dialed is unallocated - What Does It Mean?
You might have heard an IVR voice "number you have dialed is unallocated" while making a call to some number. This is not an operator or the number holder's error. Whatsoever, the situation is quite annoying and it leaves you astonished. Although, this might be caused by several other reasons like the number is deactivated or others. 
                                    
                                



