berenberg.de

Checked 21 October 2026, 21:37 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 warnings 0 failed 7 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

ns0.lon.auth.colt.net, ns1.fra.auth.colt.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns0.lon.auth.colt.net, ns1.fra.auth.colt.net
NS in the zone
ns0.lon.auth.colt.net, ns1.fra.auth.colt.net
NameserverAddressesNetwork (AS)Glue
ns0.lon.auth.colt.net212.74.77.23AS8220 COLT - COLT Technology Services Group Limited, GB-
ns1.fra.auth.colt.net212.74.78.24AS8220 COLT - COLT Technology Services Group Limited, GB-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns0.lon.auth.colt.net, ns1.fra.auth.colt.net.
    #6
  • ✓ 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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS8220 (COLT - COLT Technology Services Group Limited, GB): 2 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.lon.auth.colt.net 212.74.77.23NOERROR, 16 ms, authoritativenoyes / yesrefusedColt
ns1.fra.auth.colt.net 212.74.78.24NOERROR, 4 ms, authoritativenoyes / yesrefusedColt

Checks

  • ✓ All respond #14
    All 2 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: ns0.lon.auth.colt.net: "Colt"; ns1.fra.auth.colt.net: "Colt".
    #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 2021061896 · primary ns0.lon.auth.colt.net

Found

Primary (MNAME)
ns0.lon.auth.colt.net
Contact (RNAME)
administrator.berenbergbank.de
Serial
2021061896
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns0.lon.auth.colt.net (212.74.77.23)2021061896
ns1.fra.auth.colt.net (212.74.78.24)2021061896

Checks

  • ✓ Serial 2021061896 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns0.lon.auth.colt.net is one of the listed nameservers.
  • ✓ Contact administrator@berenbergbank.de #25
    The SOA RNAME administrator.berenbergbank.de means administrator@berenbergbank.de.
  • ✓ Date-based serial #26
    The serial 2021061896 follows the YYYYMMDDnn convention (2021-06-18).

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

25 records at the apex

Found

Read from
212.74.77.23:53
TypeValueTTL
SOAns0.lon.auth.colt.net. administrator.berenbergbank.de. 2021061896 28800 7200 604800 3003600
NSns1.fra.auth.colt.net.300
NSns0.lon.auth.colt.net.300
A20.82.63.208300
MX0 berenberg-de.mail.protection.outlook.com.300
TXT"96ykz9l775ln13f3t1g3451h5szl5q3l"300
TXT"6dh88vyb4pp8h8m83345gfx1kd51t8rj"300
TXT"00DgN000000kLz7=1TBgN00000000Cv"300
TXT"00D9b00000Sho9V=1TB9b00000008lZ"300
TXT"swisssign-check=6RRga9_1wpiHPgmDGSWAemUrVdE"300
TXT"_xbqrqzpwszl0obz7hstb4knaljz7nza"300
TXT"swisssign-check=1Adud-mIf3HChgcA8p8jlTEAYso"300
TXT"google-site-verification=ZedkJetEsID2Wh0hy0Is2duUkAQ9OV6Z0oc4tySfNg8"300
TXT"google-site-verification=oPFn3RTGxiSC0ynhmStproPNvfWyfKaREEhNVXuQ70E"300
TXT"swisssign-check=GTnFIBGx8w6RXNVQ6CDGdbIqT2k"300
TXT"docusign=fa4ad9af-4256-4f88-8751-0c40566ca369"300
TXT"v=spf1 ip4:62.96.241.0/24 include:all.spf.avature.net include:spf.protection.outlook.com include:_spf.salesforce.com ip4:89.21.27.11 ip4:89.21.27.10 -all"300
TXT"00DKB000000KiuT=1TBcz00000000BJ"300
TXT"adobe-idp-site-verification=96e04829ddeb707bc0a55f1350eb4e0788ae235f1b94d5e75d4ce834f52988c9"300
TXT"_dmark.newsletter-noreply.berenberg.de 3600 IN TXT \"v=DMARC1; p=reject\""300
TXT"apple-domain-verification=M7OrnH1v4uxY7f6n"300
TXT"teamviewer-sso-verification=270144b8960a40738c45b65dd17f338e"300
TXT"SC3VPBHjP7DBtWhM55oC18C173kJA6ZnelAVmU9BvpYJpq6uQqO4bAVBr9c6iPZJE0sPiR0FDc5wJMXppXB3Jg=="300
TXT"cisco-ci-domain-verification=2449259a1fab3f83815862c3690aec06effe0f6ca09af9f1cdcf4892e5057994"300
TXT"access-domain-verification=2ee6e83f8e82d5b84b3685827207de374fa86b0f792ec6ba9bfef6da4160e252"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; resolvers may use either.
  • ✓ 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