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A comment on Buying a single character domain – and 3 character FQDN – for £15. Parent comment
Doing a dig, there are no A records for . but they do provide NS records obviously, for all the other TLDs to resolve.
Devilish detail is probably in the RFC and likely implementation specific also, as to whether they accept it is a valid request or fail before trying.
dig A .
; <<>> DiG 9.11.5-P4-5.1-Debian <<>> A . ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26280 ;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION: ;. IN A
;; Query time: 3 msec ;; SERVER: 192.168.1.254#53(192.168.1.254) ;; WHEN: Sat Aug 15 18:19:41 BST 2020 ;; MSG SIZE rcvd: 17
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Doing a dig, there are no A records for . but they do provide NS records obviously, for all the other TLDs to resolve.
Devilish detail is probably in the RFC and likely implementation specific also, as to whether they accept it is a valid request or fail before trying.
dig A .
; <<>> DiG 9.11.5-P4-5.1-Debian <<>> A . ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26280 ;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION: ;. IN A
;; Query time: 3 msec ;; SERVER: 192.168.1.254#53(192.168.1.254) ;; WHEN: Sat Aug 15 18:19:41 BST 2020 ;; MSG SIZE rcvd: 17