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There might be good reasons why this isn't implemented but I'm not in a position to say (I don't really know). However, the vast majority of features in AWS services are there because customers requested them - so I'd encourage you to reach out to your local AWS Solutions Architect. They have channels for taking feedback to the service teams; and they may be able to find a more specific answer for you.
Hello,
Here is the answer from AWS support:
For historical reasons, Route 53 returns “NXDOMAIN” instead of “NOERROR” for empty non-terminal (ENT) domain names. Correcting this behavior is on our roadmap, but we currently don't have an ETA as AWS does not publicize the roadmap items; however, as soon as it gets released, it should be publicly announced in either one of our webpage:
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dont quite follow.. could you share example at all?
Sure!
openshift-ch-1.camptocamp.com is a DNS zone managed by Route53:
❯ dig -t ns openshift-ch-1.camptocamp.com
; <<>> DiG 9.18.20 <<>> -t ns openshift-ch-1.camptocamp.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29515 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;openshift-ch-1.camptocamp.com. IN NS
;; ANSWER SECTION: openshift-ch-1.camptocamp.com. 172800 IN NS ns-1156.awsdns-16.org. openshift-ch-1.camptocamp.com. 172800 IN NS ns-1597.awsdns-07.co.uk. openshift-ch-1.camptocamp.com. 172800 IN NS ns-340.awsdns-42.com. openshift-ch-1.camptocamp.com. 172800 IN NS ns-656.awsdns-18.net.
;; Query time: 14 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP) ;; WHEN: Mon Jan 29 10:25:22 CET 2024 ;; MSG SIZE rcvd: 195
apps.openshift-ch-1.camptocamp.com is an empty non-terminal:
❯ dig @ns-1156.awsdns-16.org. apps.openshift-ch-1.camptocamp.com
; <<>> DiG 9.18.20 <<>> @ns-1156.awsdns-16.org. apps.openshift-ch-1.camptocamp.com ; (2 servers found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 57427 ;; 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: 4096 ;; QUESTION SECTION: ;apps.openshift-ch-1.camptocamp.com. IN A
;; AUTHORITY SECTION: openshift-ch-1.camptocamp.com. 900 IN SOA ns-656.awsdns-18.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
;; Query time: 16 msec ;; SERVER: 205.251.196.132#53(ns-1156.awsdns-16.org.) (UDP) ;; WHEN: Mon Jan 29 10:26:49 CET 2024 ;; MSG SIZE rcvd: 144
There’s a wildcard *.apps.openshift-ch-1.camptocamp.com:
❯ dig @ns-1156.awsdns-16.org. test.apps.openshift-ch-1.camptocamp.com
; <<>> DiG 9.18.20 <<>> @ns-1156.awsdns-16.org. test.apps.openshift-ch-1.camptocamp.com ; (2 servers found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23259 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 1 ;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;test.apps.openshift-ch-1.camptocamp.com. IN A
;; ANSWER SECTION: test.apps.openshift-ch-1.camptocamp.com. 15 IN A 159.100.247.234
;; AUTHORITY SECTION: openshift-ch-1.camptocamp.com. 172800 IN NS ns-1156.awsdns-16.org. openshift-ch-1.camptocamp.com. 172800 IN NS ns-1597.awsdns-07.co.uk. openshift-ch-1.camptocamp.com. 172800 IN NS ns-340.awsdns-42.com. openshift-ch-1.camptocamp.com. 172800 IN NS ns-656.awsdns-18.net.
;; Query time: 17 msec ;; SERVER: 205.251.196.132#53(ns-1156.awsdns-16.org.) (UDP) ;; WHEN: Mon Jan 29 10:29:25 CET 2024 ;; MSG SIZE rcvd: 221
Now, let’s query a resolver adhering to RFC 8020:
❯ dig @ns0.dom.scw.cloud apps.openshift-ch-1.camptocamp.com
; <<>> DiG 9.18.20 <<>> @ns0.dom.scw.cloud apps.openshift-ch-1.camptocamp.com ; (2 servers found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 23370 ;; 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: ;apps.openshift-ch-1.camptocamp.com. IN A
;; AUTHORITY SECTION: . 3600 IN SOA ns0.online.net. hostmaster. 2021052601 10800 3600 604800 3600
;; Query time: 32 msec ;; SERVER: 195.154.228.249#53(ns0.dom.scw.cloud) (UDP) ;; WHEN: Mon Jan 29 10:30:31 CET 2024 ;; MSG SIZE rcvd: 122