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Android - WiFi Calling

I seem to be running into this issue w/ NextDNS:

https://community.cloudflare.com/t/wifi-calling-not-working/14712/24

nock@mobile:~$ dig mnc030.mcc234.pub.3gppnetwork.org
; <<>> DiG 9.16.12 <<>> mnc030.mcc234.pub.3gppnetwork.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60214
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;mnc030.mcc234.pub.3gppnetwork.org. IN    A
;; Query time: 280 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: sam fév 27 13:52:30 EST 2021
;; MSG SIZE  rcvd: 62
nock@mobile:~$ dig @8.8.8.8 mnc030.mcc234.pub.3gppnetwork.org
; <<>> DiG 9.16.12 <<>> @8.8.8.8 mnc030.mcc234.pub.3gppnetwork.org
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55539
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;mnc030.mcc234.pub.3gppnetwork.org. IN    A
;; AUTHORITY SECTION:
mnc030.mcc234.pub.3gppnetwork.org. 299 IN SOA    publicns1.ct.ee.co.uk. admin.ee.co.uk. 113 21600 3600 604800 600
;; Query time: 106 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: sam fév 27 13:52:49 EST 2021
;; MSG SIZE  rcvd: 125
nock@mobile:~$

 

Cloudflare says the NS has "broken for QNAME minimization, as they don’t respond to anything besides the full name". They were able to fix/workaround the issue by "adding overrides for this NS".

Requesting a similar solution from NextDNS.

Thanks.

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  • False alarm. This was an IPv6 problem at the provider.

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