portchecker.me

DNS lookup

Query A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, PTR, CAA and NAPTR records.

google.com cloudflare.com github.com

How to interpret

Compare the values with your provider’s zone. A/AAAA identify addresses, MX directs incoming mail and TXT may publish policies. Resolvers can differ because of TTL, cache or location. Keep old values before changes, verify the authoritative zone and query again after the TTL.

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