DNS queries for *.roblox.com subdomains (incl. www.roblox.com) intermittently return NXDOMAIN when resolved via ns*.roblox.com (e.g. ns01.rbxinfra.net)
Queries against IBM NS1 auth servers (e.g. dns1.p06.nsone.net) consistently return the correct CNAME chain and A record.
NetActuate
; <<>> DiG 9.18.28-1~deb12u2-Debian <<>> @ns01.rbxinfra.net games.roblox.com
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22106
;; flags: qr aa rd; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;games.roblox.com. IN A
;; ANSWER SECTION:
games.roblox.com. 300 IN CNAME titanium.roblox.com.
titanium.roblox.com. 300 IN CNAME edge-term4.roblox.com.
edge-term4.roblox.com. 300 IN CNAME edge-term4-ams2.roblox.com.
edge-term4-ams2.roblox.com. 60 IN A 128.116.21.3
;; Query time: 11 msec
;; SERVER: 157.53.225.1#53(ns01.rbxinfra.net) (UDP)
;; WHEN: Tue Sep 16 21:33:49 CEST 2025
;; MSG SIZE rcvd: 139
; <<>> DiG 9.18.28-1~deb12u2-Debian <<>> @ns01.rbxinfra.net games.roblox.com
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22411
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;games.roblox.com. IN A
;; AUTHORITY SECTION:
roblox.com. 60 IN SOA dns1.p06.nsone.net. hostmaster.nsone.net. 1658181939 3600 600 604800 60
;; Query time: 7 msec
;; SERVER: 157.53.225.1#53(ns01.rbxinfra.net) (UDP)
;; WHEN: Tue Sep 16 21:30:41 CEST 2025
;; MSG SIZE rcvd: 110
IBM NS1
; <<>> DiG 9.18.28-1~deb12u2-Debian <<>> @dns1.p06.nsone.net games.roblox.com
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30339
;; flags: qr aa rd; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;games.roblox.com. IN A
;; ANSWER SECTION:
games.roblox.com. 300 IN CNAME titanium.roblox.com.
titanium.roblox.com. 300 IN CNAME edge-term4.roblox.com.
edge-term4.roblox.com. 300 IN CNAME edge-term4-ams2.roblox.com.
edge-term4-ams2.roblox.com. 60 IN A 128.116.21.3
;; Query time: 7 msec
;; SERVER: 198.51.44.6#53(dns1.p06.nsone.net) (UDP)
;; WHEN: Tue Sep 16 21:30:29 CEST 2025
;; MSG SIZE rcvd: 139
StatusKuma screenshot of a monitor that sends requests to games.roblox.com
Not very knowledgeable in DNS, apology if there are any deviations in terminology etc…
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