DNS report for slevhry.cz

This report was generated 3 weeks ago. Refresh?
A+
Connectivity
100%
Performance
100%
Resilience & Security
100%
DNS records
92%
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Connectivity: 100%

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

Nameserver IP address(es) SOA serial
alfa.ns.active24.cz. 81.95.96.2
2a02:4a8:ac24:100::96:2
2019101405
beta.ns.active24.cz. 81.0.238.27
2001:1528:151::12
2019101405
gama.ns.active24.sk. 93.188.1.228
2a02:250:0:2c::228
2019101405

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
alfa.ns.active24.cz. 81.95.96.2
2a02:4a8:ac24:100::96:2
25ms
21ms
beta.ns.active24.cz. 81.0.238.27
2001:1528:151::12
23ms
19ms
gama.ns.active24.sk. 93.188.1.228
2a02:250:0:2c::228
33ms
32ms

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.

  • Nameserver alfa.ns.active24.cz. (81.95.96.2) replied quickly (< 50ms).
  • Nameserver alfa.ns.active24.cz. (2a02:4a8:ac24:100::96:2) replied in a reasonable time.
  • Nameserver beta.ns.active24.cz. (81.0.238.27) replied quickly (< 50ms).
  • Nameserver beta.ns.active24.cz. (2001:1528:151::12) replied in a reasonable time.
  • Nameserver gama.ns.active24.sk. (93.188.1.228) replied quickly (< 50ms).
  • Nameserver gama.ns.active24.sk. (2a02:250:0:2c::228) replied in a reasonable time.

Resilience & Security: 100%

These are the locations and providers of your nameservers.

Nameserver Location ISP
alfa.ns.active24.cz. IPv4: CZ
IPv6: CZ
AS25234 - GLOBE-AS http://www.active24.cz/, CZ
AS25234 - GLOBE-AS http://www.active24.cz/, CZ
beta.ns.active24.cz. IPv4: CZ
IPv6: CZ
AS15685 - CASABLANCA-AS Internet & Collocation Provider, CZ
AS15685 - CASABLANCA-AS Internet & Collocation Provider, CZ
gama.ns.active24.sk. IPv4: SE
IPv6: SE
AS39570 - LOOPIA, SE
AS39570 - LOOPIA, SE

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.

  • 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.
  • DNSSEC is enabled.
  • The nameservers are being operated from multiple domains (active24.cz, active24.sk).

DNS records: 92%

Our scans detected the following publicly available DNS records.

Record TTL Value
A slevhry.cz 1h 89.221.223.198
DNSKEY slevhry.cz 24h ZSK | ECDSA Curve P-256 with SHA-256 | /nQy2zr3e4XOvfJLSZG3heo563nNkPruFFR3vfE1O7VWQafpjOJS+SHS BNOT8ewTOexdxeEUnwoEVvHVle5TaA==

KSK | ECDSA Curve P-256 with SHA-256 | 0EK9ChwJW+CVCvP7mizQwEnR2OJpHgbLmilGV5OyqncZoOufo9fIbVrv xT6qid/T9sAWH7KOfzItPxkVOIbRjg==
MX slevhry.cz 1h 10 mail.slevhry.cz.
NS slevhry.cz 24h alfa.ns.active24.cz.
beta.ns.active24.cz.
gama.ns.active24.sk.
SOA slevhry.cz 24h alfa.ns.active24.cz. hostmaster.active24.cz. 2019101405 10800 1800 1209600 3600
A mail.slevhry.cz 1h 89.221.223.198
A www.slevhry.cz 1h 89.221.223.198

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.
  • No IPv6 record has been found on the zone apex (slevhry.cz). Consider enabling IPv6 in the infrastructure by adding an AAAA record on this domain.

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 "slevhry.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.
  • The active nameservers match the NS records.
  • The DNS records appear to be RFC compliant.
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