Verizon/Azure communication issue

[ross at tajvar.io (Ross Tajvar)]

We have a customer on Fios who (as far as I can tell) can't reach any IP
announced by Microsoft. I tried calling both NOCs listed on PeeringDB but
Verizon's number didn't work and the Microsoft guy hung up on me. Is there
anyone here who has a better contact at either group?

Note: It's not a Fios-wide problem, as my office is also on Fios and can
reach the IPs fine. It's just 0.ae13.gw9.iad8.alter.net [140.222.236.139]
that seems to be having a problem.

Thanks,
Ross