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DNS Lookup, Reverse DNS Lookup, Domain Configuration Check and IP Address Calculators

Domain Check Results

Running domain configuration checks for example.org...

Specific Name Server Tests (using mitch.ns.cloudflare.com)
TestDetailResult
SOA RecordChecking SOA on name server:
  Serial: 2390883229
  Refresh: 10000 seconds
  Retry: 2400 seconds
  Expire: 604800 seconds
  Minimum (default) TTL: 1800 seconds
  Primary name server: katelyn.ns.cloudflare.com
  Contact: dns@cloudflare.com
Info
SOA Serial NumberThe SOA serial number appears not to conform to RFC1912, which recommends that the serial number should be in YYYYMMDDnn format. Some systems use the Unix timestamp for the serial number.Warn
DNS ContactChecking DNS contact email address is valid.
dns@cloudflare.com seems to be valid.
Pass
DNS Master NameYour SOA record lists katelyn.ns.cloudflare.com as the Primary nameserver. This server is listed as a valid nameserver at the parent servers, which is correct.Pass
Check Missing NS Records 1All nameservers listed on the parent servers are listed on this nameserver, which is correct.Pass
Check Missing NS Records 2All nameservers listed on this nameserver are also listed on the parent servers, which is correct.Pass
Glue Record ConsistencyNo inconsistencies were found between the glue records on the parent servers and the glue records on this nameserver. Pass
Check TCPYour nameserver can respond to DNS requests using TCP, which is good. TCP may be used for large responses.Pass
A RecordThe 2 A records for example.org:
  104.20.26.109 [RESERVED]
  172.66.157.88 [RESERVED]
Pass
www A RecordThe 2 A records for www.example.org:
  172.66.157.88 [RESERVED]
  104.20.26.109 [RESERVED]
Info
MX RecordMX Records:
  0 .
Info
SPF RecordAn SPF record was found. Providing the data contained in this record is correct, this will help prevent your mail getting flagged as spam.
SPF Record:
  (TXT) "v=spf1 -all"
Pass
Check Mail Server GreetingThe mail server was not contactable. The response was Cannot connect SMTP servers: . Fail

Finished.

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