https://www.ns-lookup.io/
ns-lookup - DNS lookup
Ns-lookup analyse the dns zone, dkim and spf of your domain. Also, it will check the health of the server and the HTTP status. Best of dns lookup, and http...
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https://uptimerobot.com/free-tools/dns-lookup/?ref=header
DNS Record Lookup Tool – A, AAAA, CNAME, TXT, NS, SOA | UptimeRobot
Free DNS record lookup for any domain. Inspect common record types, confirm TTL, and diagnose DNS propagation and configuration problems quickly.
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https://dns-lookup.whoisxmlapi.com/
DNS records lookup products for MX, NS, SPF, etc. record | WhoisXML API
Check the NS, MX, SPF, A, SOA, TXT, etc. records / DNS server info of a domain name with our API, lookup tool, and database covering 2B hostnames.
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