dpcnet.com.br DNS Report

Health Score: 54%

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Checked: 8 months before


NS records at parent servers

alpha2.dpcnet.com.br [ ]
ns2.signet.com.br [ ]
ns1.signet.com.br [ ]
alpha1.dpcnet.com.br [ ]
[These were obtained from f.dns.br.]

Glue at parent nameservers 7/7

SUCCESS Parent nameservers know A records for your domain, Very good !


Mismatched glue 0/7

The glue provided by the root servers does not match glue that provided by your authoritative DNS servers.
(ns1.signet.com.br.	3600	IN	A present at Parent, missing at (,,,
(ns2.signet.com.br.	3600	IN	A present at Parent, missing at (,,,
(alpha2.dpcnet.com.br.	3600	IN	A present at Parent, missing at (,,,
(alpha1.dpcnet.com.br.	3600	IN	A present at Parent, missing at (,

Nameservers A records 0/7

Some servers does not provide A records for nameservers.
missing A record(s) for (ns1.signet.com.br,ns2.signet.com.br) at nameserver
missing A record(s) for (ns2.signet.com.br,ns1.signet.com.br) at nameserver

Nameservers report identical NS records 0/7

The NS records at your nameservers are different
At ( there are nameservers: ns1.signet.com.br. alpha1.dpcnet.com.br. ns2.signet.com.br.
At ( there are nameservers:

Nameservers respond 10/10

SUCCESS All of your nameservers listed at the parent nameservers responded.

Nameserver name validity 7/7

SUCCESS All of the NS records that your nameservers report are valid (no IPs or partial domain names).

Number of nameservers 5/5

SUCCESS You have 4 nameservers. You must have at least 2 nameservers (RFC2182 section 5 recommends at least 3 nameservers), and preferably no more than 7.

Lame nameservers 0/7

Lame nameservers:

Missing (stealth) nameservers 7/7

SUCCESS All your nameservers are also listed at the parent servers.

Root missing nameservers 0/7

DANGER There are nameservers not listed at your nameservers:

Nameservers on separate class C's 7/7

SUCCESS Nameservers are in a different networks.

public IPs 7/7

SUCCESS All of your NS records appear to use public IPs.


SOA record

SOA record is:
Hostmaster email

Serial agreement 0/7

DANGER Some nameservers have a different soa serial number That can occur because of recent master update (slave have not loaded master zone yet) or the is a problem in DNS.
There is serial 2018070302 at nameserver(s) (
There is serial at nameserver(s) (


DANGER SOA (Start of Authority) record states that your master (primary) name server is: dpcnet.com.br, but that server is not listed at the parent servers.

Serial value 1/1

SUCCESS SOA serial number is: 2018070302 This appears to be in the recommended format of YYYYMMDDnn, where 'nn' is the revision. This number must be incremented every time you make a DNS change.

Refresh value 1/1

SUCCESS SOA Retry interval is : 3600 seconds. This seems OK. (Values about 3600-7200 seconds is good if not using DNS NOTIFY; RFC1912 2.2 recommends a value between 1200 to 43200 seconds (20 minutes to 12 hours)). This value determines how often secondary/slave nameservers check with the master for updates.

Retry value 1/1

SUCCESS SOA Retry interval is : 900 seconds. This seems OK. (Values about 120-7200 seconds is good). The retry value is the amount of time your secondary/slave nameservers will wait to contact the master nameserver again if the last attempt failed.

Expire value 0/1

WARNING SOA Expire time is : 86400 seconds. This seems too small. (Values 604800 to 2419200 seconds (1-4 weeks) is good). RFC1912 suggests 2-4 weeks. This is how long a secondary/slave nameserver will wait before considering its DNS data stale if it can't reach the primary nameserver.

TTL value 1/1

SUCCESS SOA Expire time is : 43200 seconds. This seems OK. (about 300 to 86400 seconds or 5 min - 24 hours is good). RFC2308 suggests a value of 1-3 hours. This value used to determine the default (technically, minimum) TTL (time-to-live) for DNS entries, but now is used for negative caching.


DNS trace

Trace to dpcnet.com.br
lookup dpcnet.com.br at A.ROOT-SERVERS.NET( 13 ms
A.ROOT-SERVERS.NET( refer to a.dns.br(
lookup dpcnet.com.br at a.dns.br( 116 ms
a.dns.br( refer to alpha1.dpcnet.com.br(
lookup dpcnet.com.br at alpha1.dpcnet.com.br( 133 ms
got A record 'dpcnet.com.br IN A' from dpcnet.com.br(
Total time: 262 ms