試了一下HINET dns(ipv4 ipv6)回應正常
7-11.com.tw的兩台ns回應也正常
dns.seed.net.tw的ipv4回應正常，ipv6的會變成208.91那個IP
Google dns也是回應208.91.....


> www.7-11.com.tw
Server: 168.95.1.1
Address: 168.95.1.1#53

Non-authoritative answer:
Name: www.7-11.com.tw
Address: 61.57.227.41

> www.7-11.com.tw
Server: 168.95.192.1
Address: 168.95.192.1#53

Non-authoritative answer:
Name: www.7-11.com.tw
Address: 61.57.227.41

> www.7-11.com.tw
Server: 2001:b000:168::2
Address: 2001:b000:168::2#53

Non-authoritative answer:
Name: www.7-11.com.tw
Address: 61.57.227.41



> www.7-11.com.tw
Server: 61.57.229.1
Address: 61.57.229.1#53

Name: www.7-11.com.tw
Address: 61.57.227.41


> www.7-11.com.tw
Server: 61.57.229.2
Address: 61.57.229.2#53

Name: www.7-11.com.tw
Address: 61.57.227.41


> www.7-11.com.tw
Server: dns.seed.net.tw
Address: 2401:8000::101#53

Non-authoritative answer:
Name: www.7-11.com.tw
Address: 208.91.197.132


> www.7-11.com.tw
Server: 139.175.55.244
Address: 139.175.55.244#53

Non-authoritative answer:
Name: www.7-11.com.tw
Address: 61.57.227.41


> www.7-11.com.tw
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: www.7-11.com.tw
Address: 208.91.197.132