bertelsmann.de

Checked 21 October 2026, 21:38 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 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

dns009.arvato-systems.de, dns017.arvato-systems.de, ns1.arvato-systems.de, ns2.arvato-systems.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns009.arvato-systems.de, dns017.arvato-systems.de, ns1.arvato-systems.de, ns2.arvato-systems.de
NS in the zone
dns009.arvato-systems.de, dns017.arvato-systems.de, ns1.arvato-systems.de, ns2.arvato-systems.de
NameserverAddressesNetwork (AS)Glue
dns009.arvato-systems.de193.189.249.157AS6805 TDDE-ASN1 - Telefonica Germany GmbH & Co.OHG, DE193.189.249.157
dns017.arvato-systems.de84.17.190.100AS33873 arvato-systems-AS - Arvato Systems GmbH, DE84.17.190.100
ns1.arvato-systems.de84.17.168.69 2a01:4a8:3222:2222::10AS33873 arvato-systems-AS - Arvato Systems GmbH, DE AS33873 arvato-systems-AS - Arvato Systems GmbH, DE84.17.168.69 2a01:4a8:3222:2222::10
ns2.arvato-systems.de109.235.143.148 2a01:4a8:2222:2222::11AS33873 arvato-systems-AS - Arvato Systems GmbH, DE AS33873 arvato-systems-AS - Arvato Systems GmbH, DE109.235.143.148 2a01:4a8:2222:2222::11

Checks

  • ✓ 4 nameservers #6
    Delegated to dns009.arvato-systems.de, dns017.arvato-systems.de, ns1.arvato-systems.de, ns2.arvato-systems.de.
  • ✓ 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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS33873 (arvato-systems-AS - Arvato Systems GmbH, DE): 5 addresses; AS6805 (TDDE-ASN1 - Telefonica Germany GmbH & Co.OHG, DE): 1 address.
  • i
    All nameserver names under .de
    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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns009.arvato-systems.de, dns017.arvato-systems.de.
    #13

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns009.arvato-systems.de 193.189.249.157NOERROR, 11 ms, authoritativenoyes / yesrefused42
dns017.arvato-systems.de 84.17.190.100NOERROR, 9 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.1.0 (built Nov 30 2017 10:13:06 by mockbuild@jenkins.monshouwer.eu)
ns1.arvato-systems.de 84.17.168.69NOERROR, 15 ms, authoritativenoyes / yesrefusedhttps://www.youtube.com/watch?v=7qnd-hdmgfk
ns1.arvato-systems.de 2a01:4a8:3222:2222::10NOERROR, 19 ms, authoritativenoyes / yesrefusedhttps://www.youtube.com/watch?v=7qnd-hdmgfk
ns2.arvato-systems.de 109.235.143.148NOERROR, 9 ms, authoritativenoyes / yesrefusedhttps://www.youtube.com/watch?v=7qnd-hdmgfk
ns2.arvato-systems.de 2a01:4a8:2222:2222::11NOERROR, 9 ms, authoritativenoyes / yesrefusedhttps://www.youtube.com/watch?v=7qnd-hdmgfk

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: dns017.arvato-systems.de: "PowerDNS Authoritative Server 4.1.0 (built Nov 30 2017 10:13:06 by mockbuild@jenkins.monshouwer.eu)". 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

pass

serial 2026102001 · primary dns009.arvato-systems.de

Found

Primary (MNAME)
dns009.arvato-systems.de
Contact (RNAME)
hostmaster.bnic.bertelsmann.de
Serial
2026102001
Refresh / retry
3600 s / 1800 s
Expire
3600000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns009.arvato-systems.de (193.189.249.157)2026102001
dns017.arvato-systems.de (84.17.190.100)2026102001
ns1.arvato-systems.de (84.17.168.69)2026102001
ns1.arvato-systems.de (2a01:4a8:3222:2222::10)2026102001
ns2.arvato-systems.de (109.235.143.148)2026102001
ns2.arvato-systems.de (2a01:4a8:2222:2222::11)2026102001

Checks

  • ✓ Serial 2026102001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 1000h, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns009.arvato-systems.de is one of the listed nameservers.
  • ✓ Contact hostmaster@bnic.bertelsmann.de #25
    The SOA RNAME hostmaster.bnic.bertelsmann.de means hostmaster@bnic.bertelsmann.de.
  • ✓ Date-based serial #26
    The serial 2026102001 follows the YYYYMMDDnn convention (2026-10-20).

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

37 records at the apex

Found

Read from
193.189.249.157:53
TypeValueTTL
SOAdns009.arvato-systems.de. hostmaster.bnic.bertelsmann.de. 2026102001 3600 1800 3600000 36003600
NSdns017.arvato-systems.de.3600
NSdns009.arvato-systems.de.3600
NSns2.arvato-systems.de.3600
NSns1.arvato-systems.de.3600
A9.141.120.215300
MX10 bertelsmann-de.mail.protection.outlook.com.600
TXT"apple-domain-verification=Qmsnssj1VOZh56B4"600
TXT"google-site-verification=2_0TGhOrr7yeVYS6V3MUZYsCieFbg4j9KUTa_znEFEs"600
TXT"swisssign-check=9860P_aiSnolmjvgjyNKG3UMT5Y"600
TXT"v=spf1 mx include:spf.bert.group include:spf.servicemail24.de include:spf.protection.outlook.com include:spf.crsend.com a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com include:spf.mailjet.com include:eur.pb-dynmktge.com ~all"600
TXT"0e10486c1c584da2a384830ee5b4d36e"600
TXT"swisssign-check=REcwCb3nAckSwnAK4oAEkVgjWk8"600
TXT"docker-verification=beed72aa-23a3-4341-870f-c8b55e5a7f9f"600
TXT"RLJnk/CFK06jsl7K4MDv4JN6UUbKusrrHpsFMrFQVnTZ+rsLMw6dWKk1SlC0EnHWOtMk/lTK0RwAidCm9+jurg=="600
TXT"atlassian-domain-verification=Kl3ByU1tsfV9fKiC7TDDZYz1uCeTeUo0SSEh5SitZ9q99Ua74O571fgiIg//j5Hn"600
TXT"z2qtgj6ks13tqf9r28wbg4x6yj5d729l"600
TXT"atlassian-sending-domain-verification=c0ba12ca-3062-4aa4-abe8-fd4c62786419"600
TXT"adobe-idp-site-verification=cff19045-2e1f-40b3-8508-27f21ad2fd96"600
TXT"_telesec-domain-validation=56B83F7122D23D37BFEC78B67993F3896E6AD9B048447F09128C021F475B1DD0"600
TXT"apple-domain-verification=3Qb42cMBZEFgPJtZ"600
TXT"d365mktkey=3peyboeoicc5u5bodj6ifk1bi"600
TXT"atlassian-domain-verification=dcHo/9CyMHFTHnIg1zW2UjNum0K9KSeXWIuNsFDeyrpkET4FXoX5CGczp0D5/6rz"600
TXT"d365mktkey=3t6tujfxrtk0mfnzjx74ozsg4"600
TXT"8jdckv59j01k1hywcwd2hvztz9ln61nx"600
TXT"openai-domain-verification=dv-z9KGtqyEV1bXjg9TVeKxdbk0"600
TXT"adobe-sign-verification=e7e0b8432c80a0afbd9b9de4cde13a37"600
TXT"_telesec-domain-validation=CRMWG9LXO8C2N3NNZJQ6O1GSLS5T0SNFBPDFK35J2JW5BJGFTIUIX2BXM5CDHY3C"600
TXT"docusign=b301f925-28a9-41fd-871a-088bebeaab0b"600
TXT"d365mktkey=4ku8xjvnbof2l3n43syl4ysy"600
TXT"Z+o8fEv/WQEMCELMVpSMw7e5vDweU/esIGOHiS7ce+EXbVEYKKTjC5b3jMwmlvkoZ3G/StxCgnIUm9FPs7V+Tw=="600
TXT"box-domain-verification=e59ec1d5459c7bdf90febfe929763bdc530336155d1d70045ec1a318eaf33c17"600
TXT"wxy1yzl78g77xy1bmsl08nz2xhgm4899"600
TXT"d365mktkey=E2f55bRpxzdHMzLxUaaSjW3aVdbjcU892BcJ5KAwSY8x"600
TXT"docusign=0d79f243-9532-48cc-829d-e13aa33f9d58"600
TXT"miro-verification=9ae88a0a0a49107717d108e5976b56f7fa07a099"600
TXT"b6r47gj8gz5njbll8q8yn1lbvc2dr8cb"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 10m, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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