mastercard.de

Checked 21 October 2026, 23:21 UTC · via 8.8.8.8
!Passed with warnings
20 passed 3 warnings 0 failed 6 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

info

a1-29.akam.net, a18-64.akam.net, a22-65.akam.net, a26-66.akam.net, a7-67.akam.net, a9-64.akam.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
a1-29.akam.net, a18-64.akam.net, a22-65.akam.net, a26-66.akam.net, a7-67.akam.net, a9-64.akam.net
NS in the zone
a1-29.akam.net, a18-64.akam.net, a22-65.akam.net, a26-66.akam.net, a7-67.akam.net, a9-64.akam.net
NameserverAddressesNetwork (AS)Glue
a1-29.akam.net193.108.91.29 2600:1401:2::1dAS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a18-64.akam.net95.101.36.64 2600:1480:4800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a22-65.akam.net23.211.61.65 2600:1480:7800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-66.akam.net23.74.25.66 2600:1480:b800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-67.akam.net23.61.199.67 2600:1406:32::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a9-64.akam.net184.85.248.64 2a02:26f0:117::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-29.akam.net, a18-64.akam.net, a22-65.akam.net, a26-66.akam.net, a7-67.akam.net, a9-64.akam.net.
  • ✓ 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 6 IPv4 /24s and 6 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 12 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .net
    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

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-29.akam.net 193.108.91.29NOERROR, 3 ms, authoritativenoyes / yesrefused41824.9
a1-29.akam.net 2600:1401:2::1dNOERROR, 3 ms, authoritativenoyes / yesrefused41824.10
a18-64.akam.net 95.101.36.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a18-64.akam.net 2600:1480:4800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a22-65.akam.net 23.211.61.65NOERROR, 6 ms, authoritativenoyes / yesrefused48878.29
a22-65.akam.net 2600:1480:7800::41NOERROR, 6 ms, authoritativenoyes / yesrefused48878.32
a26-66.akam.net 23.74.25.66NOERROR, 3 ms, authoritativenoyes / yesrefused48878.27
a26-66.akam.net 2600:1480:b800::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a7-67.akam.net 23.61.199.67NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a7-67.akam.net 2600:1406:32::43NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a9-64.akam.net 184.85.248.64NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a9-64.akam.net 2a02:26f0:117::40NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8

Checks

  • ✓ All respond #14
    All 12 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-29.akam.net: "41824.9"; a1-29.akam.net: "41824.10"; a18-64.akam.net: "48878.31"; a18-64.akam.net: "48878.33"; a22-65.akam.net: "48878.29"; a22-65.akam.net: "48878.32"; a26-66.akam.net: "48878.27"; a26-66.akam.net: "48878.30"; a7-67.akam.net: "41824.5"; a7-67.akam.net: "41824.11"; a9-64.akam.net: "41824.4"; a9-64.akam.net: "41824.8". Hide or replace the version string.
    #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

info

serial 2011012165 · primary dns2.mastercard.com

Found

Primary (MNAME)
dns2.mastercard.com
Contact (RNAME)
hostmaster.mastercard.com
Serial
2011012165
Refresh / retry
14400 s / 3600 s
Expire
2419200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-29.akam.net (193.108.91.29)2011012165
a1-29.akam.net (2600:1401:2::1d)2011012165
a18-64.akam.net (95.101.36.64)2011012165
a18-64.akam.net (2600:1480:4800::40)2011012165
a22-65.akam.net (23.211.61.65)2011012165
a22-65.akam.net (2600:1480:7800::41)2011012165
a26-66.akam.net (23.74.25.66)2011012165
a26-66.akam.net (2600:1480:b800::42)2011012165
a7-67.akam.net (23.61.199.67)2011012165
a7-67.akam.net (2600:1406:32::43)2011012165
a9-64.akam.net (184.85.248.64)2011012165
a9-64.akam.net (2a02:26f0:117::40)2011012165

Checks

  • ✓ Serial 2011012165 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 28d, negative TTL 5m.
  • i
    Hidden master
    The primary nameserver dns2.mastercard.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact hostmaster@mastercard.com #25
    The SOA RNAME hostmaster.mastercard.com means hostmaster@mastercard.com.
  • ✓ Date-based serial #26
    The serial 2011012165 follows the YYYYMMDDnn convention (2011-01-21).

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

11 records at the apex

Found

Read from
193.108.91.29:53
TypeValueTTL
SOAdns2.mastercard.com. hostmaster.mastercard.com. 2011012165 14400 3600 2419200 3003600
NSa22-65.akam.net.3600
NSa26-66.akam.net.3600
NSa7-67.akam.net.3600
NSa18-64.akam.net.3600
NSa9-64.akam.net.3600
NSa1-29.akam.net.3600
A104.101.249.21220
MX10 mail.mastercard.de.3600
TXT"facebook-domain-verification=bhdrbi2hrxqcpj3yo6tfttf1f973e3"3600
TXT"v=spf1 include:deliverygateways.mastercard.com ~all"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 1h; 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.
  • 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