Flixbus, flixtrain domains - incorrect A record via 1.1.1.1

Hey, first time here so I hope I get everything right.

Summary: using 1.1.1.1 / 1.0.0.1 as DNS provider returns incorrect A records for a variety of flixwhatever domains (e.g. flixbus.de, flixtrain.com), which all should resolve to Akamai as flixbus.edgekey.net

Using Google 8.8.8.8 returns a working A record.

Purging the cache entries via the Purge Cache tool has no positive effect.

Connected via the TXL server (Berlin, Germany).

Connection Info

https://cloudflare-dns.com/help/#eyJpc0NmIjoiWWVzIiwiaXNEb3QiOiJObyIsImlzRG9oIjoiTm8iLCJyZXNvbHZlcklwLTEuMS4xLjEiOiJZZXMiLCJyZXNvbHZlcklwLTEuMC4wLjEiOiJZZXMiLCJyZXNvbHZlcklwLTI2MDY6NDcwMDo0NzAwOjoxMTExIjoiWWVzIiwicmVzb2x2ZXJJcC0yNjA2OjQ3MDA6NDcwMDo6MTAwMSI6IlllcyIsImRhdGFjZW50ZXJMb2NhdGlvbiI6IlRYTCIsImlzV2FycCI6Ik5vIiwiaXNwTmFtZSI6IkNsb3VkZmxhcmUiLCJpc3BBc24iOiIxMzMzNSJ9

DIG output:

matt in ~  dig www.flixtrain.de @1.1.1.1

; <<>> DiG 9.10.6 <<>> www.flixtrain.de @1.1.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21317
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;www.flixtrain.de.		IN	A

;; ANSWER SECTION:
www.flixtrain.de.	60	IN	CNAME	flixbus.edgekey.net.
flixbus.edgekey.net.	21600	IN	CNAME	e34529.b.akamaiedge.net.
e34529.b.akamaiedge.net. 20	IN	A	184.25.239.9
e34529.b.akamaiedge.net. 20	IN	A	184.25.239.34

;; Query time: 52 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Mon Jul 26 10:46:35 CEST 2021
;; MSG SIZE  rcvd: 144

matt in ~  dig www.flixtrain.de @1.0.0.1

; <<>> DiG 9.10.6 <<>> www.flixtrain.de @1.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59027
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;www.flixtrain.de.		IN	A

;; ANSWER SECTION:
www.flixtrain.de.	53	IN	CNAME	flixbus.edgekey.net.
flixbus.edgekey.net.	21593	IN	CNAME	e34529.b.akamaiedge.net.
e34529.b.akamaiedge.net. 13	IN	A	184.25.239.9
e34529.b.akamaiedge.net. 13	IN	A	184.25.239.34

;; Query time: 141 msec
;; SERVER: 1.0.0.1#53(1.0.0.1)
;; WHEN: Mon Jul 26 10:46:42 CEST 2021
;; MSG SIZE  rcvd: 144

matt in ~  dig www.flixtrain.de @8.8.8.8

; <<>> DiG 9.10.6 <<>> www.flixtrain.de @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52368
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.flixtrain.de.		IN	A

;; ANSWER SECTION:
www.flixtrain.de.	42	IN	CNAME	flixbus.edgekey.net.
flixbus.edgekey.net.	20771	IN	CNAME	e34529.b.akamaiedge.net.
e34529.b.akamaiedge.net. 19	IN	A	2.21.133.224
e34529.b.akamaiedge.net. 19	IN	A	2.21.133.243

;; Query time: 66 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Jul 26 10:46:48 CEST 2021
;; MSG SIZE  rcvd: 144

matt in ~  dig +short CHAOS TXT id.server @1.1.1.1
"TXL"
matt in ~  dig +short CHAOS TXT id.server @1.0.0.1
"TXL"

DNSViz is here: www.flixtrain.de | DNSViz

I would have thought this might correct itself over time, but after two days it’s still the same.

I don’t know if someone takes a deeper look into these reports… in the meantime I have to stick with 8.8.8.8 or my ISPs crappy resolver.

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