DNSルックアップ

このツールの使い方

1. 1

   Type a domain name such as example.com into the input field (enter the bare domain, not a full https:// URL).

2. 2

   Click Lookup DNS to send the query.

3. 3

   Read the returned record sets in the JSON panel below, grouped by record type (A, AAAA, NS, SOA, MX, TXT).

4. 4

   Edit the domain and run it again to compare another host or re-check after a DNS change.

DNSとは何ですか？

よくある活用例

• Confirm an A or AAAA record points to the right server IP after migrating hosting providers.

• Check MX records and their priorities when email is bouncing or not being delivered.

• Verify a TXT record for SPF, DKIM, or a domain-ownership token required by Google, Microsoft, or an SSL issuer.

• Find which name servers (NS) are authoritative for a domain before or after a registrar transfer.

• Inspect the SOA serial number to see whether a recent zone change has actually been published.

• Quickly compare the published records of two domains side by side while troubleshooting.

よくある質問