commerzbank.de

Checked 21 October 2026, 22:10 UTC · via 8.8.8.8
!Passed with warnings
21 passed 4 warnings 0 failed 4 info

Registration

info

.de country-code

Found

TLD
.de (country-code)
ICANN policies apply
no

Checks

  • i
    .de is a country-code TLD (ccTLD)
    Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.
    #1
  • ✓ TLD delegated and signed #2
    .de is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

warn

ns2.commerzbank.com, ns3.commerzbank.com, ns4.commerzbank.com, ns5.commerzbank.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns2.commerzbank.com, ns3.commerzbank.com, ns4.commerzbank.com, ns5.commerzbank.com
NS in the zone
ns2.commerzbank.com, ns3.commerzbank.com, ns4.commerzbank.com, ns5.commerzbank.com
NameserverAddressesNetwork (AS)Glue
ns2.commerzbank.com212.149.48.134AS16365 COMMERZBANK - Commerzbank Aktiengesellschaft, DE-
ns3.commerzbank.com212.149.48.137AS16365 COMMERZBANK - Commerzbank Aktiengesellschaft, DE-
ns4.commerzbank.com193.108.159.13AS15375 DKB - Commerzbank Aktiengesellschaft, DE-
ns5.commerzbank.com193.108.159.14AS15375 DKB - Commerzbank Aktiengesellschaft, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns2.commerzbank.com, ns3.commerzbank.com, ns4.commerzbank.com, ns5.commerzbank.com.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ 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 2 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15375 (DKB - Commerzbank Aktiengesellschaft, DE): 2 addresses; AS16365 (COMMERZBANK - Commerzbank Aktiengesellschaft, DE): 2 addresses.
  • i
    All nameserver names under .com
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns2.commerzbank.com 212.149.48.134NOERROR, 7 ms, authoritativenoyes / yesrefusedns2.commerzbank.com
ns3.commerzbank.com 212.149.48.137NOERROR, 7 ms, authoritativenoyes / yesrefusedns3.commerzbank.com
ns4.commerzbank.com 193.108.159.13NOERROR, 157 ms, authoritativenoyes / yesrefusedns4.commerzbank.com
ns5.commerzbank.com 193.108.159.14NOERROR, 157 ms, authoritativenoyes / yesrefusedns5.commerzbank.com

Checks

  • ✓ All respond #14
    All 4 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: ns2.commerzbank.com: "ns2.commerzbank.com"; ns3.commerzbank.com: "ns3.commerzbank.com"; ns4.commerzbank.com: "ns4.commerzbank.com"; ns5.commerzbank.com: "ns5.commerzbank.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

warn

serial 2209 · primary ns2.commerzbank.com

Found

Primary (MNAME)
ns2.commerzbank.com
Contact (RNAME)
dns.commerzbank.com
Serial
2209
Refresh / retry
604802 s / 86409 s
Expire
6048002 s
Negative TTL
302 s

Serial per nameserver

NameserverSerial
ns2.commerzbank.com (212.149.48.134)2209
ns3.commerzbank.com (212.149.48.137)2209
ns4.commerzbank.com (193.108.159.13)2209
ns5.commerzbank.com (193.108.159.14)2209

Checks

  • ✓ Serial 2209 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 168h0m2s is outside 20m–1d. Current values: refresh 168h0m2s, retry 24h0m9s, expire 1680h0m2s, negative TTL 5m2s.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns2.commerzbank.com is one of the listed nameservers.
  • ✓ Contact dns@commerzbank.com #25
    The SOA RNAME dns.commerzbank.com means dns@commerzbank.com.
  • ✓ Counter serial #26
    The serial 2209 is a plain counter.

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

warn

22 records at the apex

Found

Read from
212.149.48.134:53
TypeValueTTL
SOAns2.commerzbank.com. dns.commerzbank.com. 2209 604802 86409 6048002 302900
NSns4.commerzbank.com.900
NSns5.commerzbank.com.900
NSns2.commerzbank.com.900
NSns3.commerzbank.com.900
A212.149.50.208180
MX5 commerzbank-com.mail.protection.outlook.com.3600
TXT"QuoVadis=1ae00f22-5dab-4944-9cd9-74578e81c22d"60
TXT"_globalsign-domain-verification=OgF-e5Mk_xy_LkFtSGHCycwXeLzj-W1-NH_69Tme2w"60
TXT"ZC4BJvU1wKdZM2HX0vWKg+UJQtsI/U/xXIKfYffv4fY="60
TXT"3603 google-site-verification=bISvdhjGg44Zaamhe_RyjI60ZjctWo9-nEi4_J2iDvY"60
TXT"1/abd9hB56PMH6mI/VSz9enJkHdJdAUjBxmdTJr4ids="60
TXT"tiktok-developers-site-verification=BxPftrMAKpkRPUF9Daxuqqh33ARv8GwT"60
TXT"facebook-domain-verification=ruvbh3tj79u6r99hy2wdqz4chdez53"60
TXT"google-site-verification=aFSJRADcjKVFfqbc2TbTVK4pMyiAzkQ0i-gDPFo2Mo8"60
TXT"apple-domain-verification=JRSK2OePUuBlPT8m7rK-aaqnEXDEs8AO3B99V16Nw7I"60
TXT"_z1yxs2v5c52cs7i4o7r1h1pyjab1g5h"60
TXT"apple-domain-verification=HQMzsk1SXxr820GQNp_PHfhfDCX9k17YuibPC9oq9BY"60
TXT"v=spf1 a ip4:212.149.50.150 ip4:212.149.48.100 include:spf.protection.outlook.com -all"60
CAA0 issue "globalsign.com"3600
CAA0 issue "digicert.com"3600
CAA0 iodef "mailto:caa-alerts@commerzbank.com"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (3m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 15m; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: globalsign.com, digicert.com.