DNS report for alfaklima.cz

This report was generated 6d ago. Refresh?
A+
Connectivity
100%
Performance
100%
Resilience & Security
86%
DNS records
92%
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Connectivity: 100%

The following nameservers are available and responding correctly for DNS queries for your domain alfaklima.cz.

Nameserver IP address(es) SOA serial
ns1.hosting90.cz. 130.193.8.82
2a03:b780::1:1
2017012002
ns2.hosting90.cz. 77.78.100.57
2001:1528:124:101::1
2017012002
ns3.hosting90.net. 104.236.202.83
2604:a880:800:10::696:f001
2017012002

Good news, no warnings or errors were found.

We could not find any recommendations at this time.

Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.

  • All nameservers reply with the same SOA serial number.
  • The nameserver IPs are distributed across multiple subnets.
  • All nameservers are online.
  • Nameservers are available over IPv4.
  • Nameservers are available over IPv6.

Performance: 100%

We tested each nameserver and measured the following response times.

Nameserver IP address(es) Response time
ns1.hosting90.cz. 130.193.8.82
2a03:b780::1:1
20ms
19ms
ns2.hosting90.cz. 77.78.100.57
2001:1528:124:101::1
26ms
19ms
ns3.hosting90.net. 104.236.202.83
2604:a880:800:10::696:f001
77ms
83ms

Good news, no warnings or errors were found.

We detected some possible recommendations for you to consider. No penalties were given for these, but resolving them can give you a higher DNS score.

  • Nameserver ns3.hosting90.net. (104.236.202.83) replied reasonably fast (< 150ms), but you should aim for < 50ms response times.

Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.

  • Nameserver ns1.hosting90.cz. (130.193.8.82) replied quickly (< 50ms).
  • Nameserver ns1.hosting90.cz. (2a03:b780::1:1) replied in a reasonable time.
  • Nameserver ns2.hosting90.cz. (77.78.100.57) replied quickly (< 50ms).
  • Nameserver ns2.hosting90.cz. (2001:1528:124:101::1) replied in a reasonable time.
  • Nameserver ns3.hosting90.net. (2604:a880:800:10::696:f001) replied in a reasonable time.

Resilience & Security: 86%

These are the locations and providers of your nameservers.

Nameserver Location ISP
ns1.hosting90.cz. IPv4: CZ
IPv6: CZ
AS198171 - HOSTING90 ===== UPSTREAM connectivity =====, CZ
AS198171 - HOSTING90 ===== UPSTREAM connectivity =====, CZ
ns2.hosting90.cz. IPv4: CZ
IPv6: CZ
AS15685 - CASABLANCA-AS Internet & Collocation Provider, CZ
AS15685 - CASABLANCA-AS Internet & Collocation Provider, CZ
ns3.hosting90.net. IPv4: US
IPv6: US
AS14061 - DIGITALOCEAN-ASN - DigitalOcean, LLC, US
AS14061 - DIGITALOCEAN-ASN - DigitalOcean, LLC, US

We detected the following errors or warnings about your DNS configuration. These caused your DNS rating to be lowered. Resolving these will grant a higher DNS Spy rating for your domain.

  • No DNSSEC records found. Consider enabling DNSSEC, as it provides a way to validate DNS responses for data integrity.

We detected some possible recommendations for you to consider. No penalties were given for these, but resolving them can give you a higher DNS score.

  • No CAA records found. Consider adding CAA records, as it adds increased security by limiting which Certificate Authorities can issue certificates for this domain. (more info)

Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.

  • You have more than 1 nameserver.
  • The IPv4 nameservers are distributed among multiple providers.
  • The IPv4 nameservers are distributed across multiple locations.
  • The IPv6 nameservers are distributed among multiple providers.
  • The IPv6 nameservers are distributed across multiple locations.
  • The nameservers are being operated from multiple domains (hosting90.cz, hosting90.net).

DNS records: 92%

Our scans detected the following publicly available DNS records.

Record TTL Value
A alfaklima.cz 1h 130.193.9.24
AAAA alfaklima.cz 1h 2a03:b780:1:1:216:3eff:fe00:518
MX alfaklima.cz 1h 10 antispam.hosting90.cz.
NS alfaklima.cz 1h ns1.hosting90.cz.
ns2.hosting90.cz.
ns3.hosting90.net.
SOA alfaklima.cz 1h ns1.hosting90.cz. admin.hosting90.cz. 2017012002 7200 1200 1209600 3600
CNAME *.alfaklima.cz 1h alfaklima.cz.
A mail.alfaklima.cz 1m 37.46.82.67
A smtp.alfaklima.cz 1h 130.193.10.76
AAAA smtp.alfaklima.cz 1h 2a03:b780:1:0:216:3eff:fe00:24c
CNAME www.alfaklima.cz 1h alfaklima.cz.

We detected the following errors or warnings about your DNS configuration. These caused your DNS rating to be lowered. Resolving these will grant a higher DNS Spy rating for your domain.

  • We only detected 1 MX record. Multiple MX records (or multiple IPs behind the MX record) provide redundancy and a more robust e-mail setup.

We detected some possible recommendations for you to consider. No penalties were given for these, but resolving them can give you a higher DNS score.

  • No SPF records were found. SPF records limit which IPs are allowed to send mail from this domain. Even if this domain doesn't send e-mails, you should set up SPF to confirm it will never send e-mail, to prevent spoofing.
  • No DMARC records have been found. Consider configuring DMARC for improved e-mail authentication.

Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.

  • The MX record for "alfaklima.cz" has a long TTL (1h+).
  • The NS records have a long TTL (1h+).
  • Your SOA serial number follows the best practice YYYYMMDDxx format.
  • Found a root (apex) DNS record.
  • Found a www DNS record.
  • Found an IPv6 root DNS record.
  • The active nameservers match the NS records.
  • The DNS records appear to be RFC compliant.
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