indexcopernicus.com

Checked 22 October 2026, 09:16 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 6 info

Registration

info

.com generic · Key-Systems GmbH · expires 2027-09-26

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Key-Systems GmbH
Registered
26 September 2002
Last changed
16 September 2026
Expires
26 September 2027
Status
client transfer prohibited
Registry nameservers
dns.home.pl, dns2.home.pl
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2027-09-26 #3
    The registration is valid until 2027-09-26 (339 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

dns.home.pl, dns2.home.pl

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns.home.pl, dns2.home.pl
NS in the zone
dns.home.pl, dns2.home.pl, dns3.home.pl
NameserverAddressesNetwork (AS)Glue
dns.home.pl217.160.80.244 2001:8d8:fe:53:6870::1AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
dns2.home.pl217.160.81.248 2001:8d8:fe:53:6870::2AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
dns3.home.pl (zone only)185.132.34.251 2607:f1c0:fe:53:185:132:34:251AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns.home.pl, dns2.home.pl.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: dns3.home.pl. dns.home.pl, dns2.home.pl, dns3.home.pl report NS dns.home.pl dns2.home.pl dns3.home.pl.
    #7
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 2 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 4 addresses.
  • i
    All nameserver names under .pl
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.home.pl 217.160.80.244NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
dns.home.pl 2001:8d8:fe:53:6870::1NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
dns2.home.pl 217.160.81.248NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
dns2.home.pl 2001:8d8:fe:53:6870::2NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
dns3.home.pl 185.132.34.251NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
dns3.home.pl 2607:f1c0:fe:53:185:132:34:251NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 6 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: dns.home.pl: "Served by PowerDNS - https://www.powerdns.com/"; dns2.home.pl: "Served by PowerDNS - https://www.powerdns.com/"; dns3.home.pl: "Served by PowerDNS - https://www.powerdns.com/".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 1665124216 · primary dns.home.pl

Found

Primary (MNAME)
dns.home.pl
Contact (RNAME)
admin.home.pl
Serial
1665124216
Refresh / retry
14400 s / 7200 s
Expire
2419200 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns.home.pl (217.160.80.244)1665124216
dns.home.pl (2001:8d8:fe:53:6870::1)1665124216
dns2.home.pl (217.160.81.248)1665124216
dns2.home.pl (2001:8d8:fe:53:6870::2)1665124216
dns3.home.pl (185.132.34.251)1665124216
dns3.home.pl (2607:f1c0:fe:53:185:132:34:251)1665124216

Checks

  • ✓ Serial 1665124216 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 2h, expire 28d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns.home.pl is one of the listed nameservers.
  • ✓ Contact admin@home.pl #25
    The SOA RNAME admin.home.pl means admin@home.pl.
  • ✓ Timestamp serial #26
    The serial 1665124216 is a Unix timestamp (2022-10-07 06:30 UTC).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

9 records at the apex

Found

Read from
217.160.80.244:53
TypeValueTTL
SOAdns.home.pl. admin.home.pl. 1665124216 14400 7200 2419200 36003600
NSdns.home.pl.3600
NSdns3.home.pl.3600
NSdns2.home.pl.3600
A146.59.13.2383600
MX10 indexcopernicus.home.pl.3600
TXT"google-site-verification=sV07Ay1pSB7HufMkcqZ4M76bScwWBPXy7cdIcxfgwM4"60
TXT"google-site-verification=35Ijgdy47iIhvev30YN2b5U9n7AWmIWjq3c9Go7W4so"60
TXT"v=spf1 mx ip4:212.85.110.231 include:em.fakturownia.pl include:fakturownia.pl include:spf.enewsletter.pl ~all"60

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35