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Anyone have a good contact for T-Mobile authoritative DNS? I've had no
response from [email protected].
My customers are reporting that T-Mobile WiFi calling (sometimes) does
not work on our Internet service. This appears to be due to DNS
resolution failures.
The cause of the failures seems to be that geo9.t-mobile.com and
geo10.t-mobile.com incorrectly return NXDOMAIN when queried for NS
records for epdg.epc.geo.mnc260.mcc310.pub.3gppnetwork.org and
epc.geo.mnc260.mcc310.pub.3gppnetwork.org. Note that they correctly
return an answer when queried for A records. See also:
https://dnsviz.net/d/epdg.epc.mnc260.mcc310.pub.3gppnetwork.org/dnssec/
--
Richard
--- End Message ---
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