DNS report for rsd.cz

This report was generated 1 week ago. Refresh?
A+
Connectivity
100%
Performance
100%
Resilience & Security
100%
DNS records
100%
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Connectivity: 100%

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

Nameserver IP address(es) SOA serial
dns.nethost.cz. 81.0.235.1
2001:1528:132::60
2022061702
sns.nethost.sk. 93.185.100.244
2a00:1ed0:46:200::1212:247
2022061702
tns.nethost.eu. 178.238.47.238
2a01:430:13e:0:200::31
2022061702

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
dns.nethost.cz. 81.0.235.1
2001:1528:132::60
39ms
47ms
sns.nethost.sk. 93.185.100.244
2a00:1ed0:46:200::1212:247
43ms
55ms
tns.nethost.eu. 178.238.47.238
2a01:430:13e:0:200::31
31ms
27ms

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 dns.nethost.cz. (81.0.235.1) replied quickly (< 50ms).
  • Nameserver dns.nethost.cz. (2001:1528:132::60) replied in a reasonable time.
  • Nameserver sns.nethost.sk. (93.185.100.244) replied quickly (< 50ms).
  • Nameserver sns.nethost.sk. (2a00:1ed0:46:200::1212:247) replied in a reasonable time.
  • Nameserver tns.nethost.eu. (178.238.47.238) replied quickly (< 50ms).
  • Nameserver tns.nethost.eu. (2a01:430:13e:0:200::31) replied in a reasonable time.

Resilience & Security: 100%

These are the locations and providers of your nameservers.

Nameserver Location ISP
dns.nethost.cz. IPv4: CZ
IPv6: CZ
AS15685 - CASABLANCA-AS Internet & Collocation Provider, CZ
AS15685 - CASABLANCA-AS Internet & Collocation Provider, CZ
sns.nethost.sk. IPv4: CZ
IPv6: CZ
AS43541 - VSHOSTING, CZ
AS43541 - VSHOSTING, CZ
tns.nethost.eu. IPv4: CZ
IPv6: CZ
AS24971 - MASTER-AS Czech Republic www.master.cz, CZ
AS24971 - MASTER-AS Czech Republic www.master.cz, CZ

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.

  • All IPv4 nameservers appear to be hosted in the same country (CZ). You might want to consider spreading the nameservers geographically.
  • All IPv6 nameservers appear to be hosted in the same country (CZ). You might want to consider spreading the nameservers geographically.
  • 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 IPv6 nameservers are distributed among multiple providers.
  • DNSSEC is enabled.
  • The nameservers are being operated from multiple domains (nethost.cz, nethost.sk, nethost.eu).

DNS records: 100%

Our scans detected the following publicly available DNS records.

Record TTL Value
A rsd.cz 1h 82.142.117.198
DNSKEY rsd.cz 1h ZSK | ECDSA Curve P-256 with SHA-256 | gLdGsARoDmD0KiCS8bgnUgKvQ+p3cI2cihxzp9EUeKiw80y3UkuiOveu 40/rMAvQjHyEcNHZ5iaOc1nZw3BfhQ==

KSK | ECDSA Curve P-256 with SHA-256 | vlr2lGyb7VJIakqeeTn1N+U6uJVUQaZIp9nZYOlHedy6WBvvTPd5I6D4 nfWL7V6kBpmSQ526UkW7a3URaCalXw==
MX rsd.cz 1h 0 rsd-cz.mail.protection.outlook.com.
NS rsd.cz 1h dns.nethost.cz.
sns.nethost.sk.
tns.nethost.eu.
SOA rsd.cz 1h dns.nethost.cz. hostmaster.nethost.cz. 2022061702 10801 3600 3600000 3600
TXT rsd.cz 1h "v=spf1 a mx ip4:185.240.221.25 ip4:212.20.102.147 include:spf.protection.outlook.com -all"
CNAME autodiscover.rsd.cz 1h autodiscover.outlook.com.
CNAME gw.rsd.cz 1h gw01.rsd.cz.
A gw01.rsd.cz 1h 185.240.223.204
A www.rsd.cz 1h 82.142.117.198

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 DMARC records have been found. Consider configuring DMARC for improved e-mail authentication.
  • No IPv6 record has been found on the zone apex (rsd.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.

  • Single MX record but with multiple IPs associated to it.
  • The MX record for "rsd.cz" has a long TTL (1h+).
  • The NS records have a long TTL (1h+).
  • Your SOA serial number follows the best practice YYYYMMDDxx format.
  • SPF records have been found.
  • SPF records are set up restrictively.
  • 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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