nanog mailing list archives

Re: T-Mobile help!!


From: Martin Hannigan <hannigan () gmail com>
Date: Thu, 31 Oct 2019 11:56:12 -0500

Check out STIR/SHAKEN:

https://transnexus.com/whitepapers/understanding-stir-shaken/
https://transition.fcc.gov/cgb/Robocall-Strike-Force-Final-Report.pdf

For what it's worth, American Express Fraud Department comes up at "Spam
Risk" through my provider.

There are "recommendations" for labels. I do believe the carrier is setting
the labels and I would reasonably surmise they are the source. It could be
prior use of an assigned number. Or not. I am not aware of how to get the
labeling of a number fixed. Anyone?

YMMV.

Best,

-M<





On Thu, Oct 31, 2019 at 8:24 AM Ca By <cb.list6 () gmail com> wrote:



On Thu, Oct 31, 2019 at 6:05 AM David Funderburk <dfund () globalvision net>
wrote:

One of our customers office number is coming across as 'Survey Call' on
T-Mobile cell phones.  I know with certainty it's with 'T-Mobile' phones.
I don't have another contact on another network that I know I can try.  How
do we get that fixed?

Thanks for any suggestions!


Probably number spoofing and has nothing to do with T-Mobile


https://www.npr.org/2019/06/06/727711432/do-i-know-you-and-other-spam-phone-calls-we-can-t-get-rid-of



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