```
dig @
a.gtld
-servers.net.
liuxuan.net ; <<>> DiG 9.11.3-2-Debian <<>> @
a.gtld
-servers.net.
liuxuan.net; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31110
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;
liuxuan.net. IN A
;; AUTHORITY SECTION:
liuxuan.net. 172800 IN NS
f1g1ns2.dnspod.ne.
liuxuan.net. 172800 IN NS
f1g1ns1.dnspod.ne.
;; Query time: 15 msec
;; SERVER: 2001:503:a83e::2:30#53(2001:503:a83e::2:30)
;; WHEN: Wed Jul 18 19:57:39 PDT 2018
;; MSG SIZE rcvd: 93
```
是不是在域名注册商的系统里弄错了?感觉应该是
f1g1ns1.dnspod.net ,但是后面少了个 t。现在的 TTL 是 48 小时,修改后可能还需要等一阵子才能生效。