Title says it all, questions just ask
Tapatalk
You can still dial a 7-digit number? I thought carriers all dropped support for that ages ago to get a few extra numbers. Out of curiosity, does your call log show the 7-digit or 10-digit number? If it's the 7-digit it's probably your carrier's configuration issue and their tower is putting the 617 in for you. If it's the 10-digit I've got no clue where it would pull that from - that's Cambridge, MA.