dfs.de

Checked 21 October 2026, 22:14 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 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

info

ns1-05.azure-dns.com, ns2-05.azure-dns.net, ns3-05.azure-dns.org, ns4-05.azure-dns.info

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1-05.azure-dns.com, ns2-05.azure-dns.net, ns3-05.azure-dns.org, ns4-05.azure-dns.info
NS in the zone
ns1-05.azure-dns.com, ns2-05.azure-dns.net, ns3-05.azure-dns.org, ns4-05.azure-dns.info
NameserverAddressesNetwork (AS)Glue
ns1-05.azure-dns.com13.107.236.5 2603:1061:0:700::5AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns2-05.azure-dns.net150.171.21.5 2620:1ec:8ec:700::5AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns3-05.azure-dns.org204.14.183.5 2a01:111:4000:700::5AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns4-05.azure-dns.info208.84.5.5 2620:1ec:bda:700::5AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1-05.azure-dns.com, ns2-05.azure-dns.net, ns3-05.azure-dns.org, ns4-05.azure-dns.info.
  • ✓ 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 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .info, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1-05.azure-dns.com 13.107.236.5NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1-05.azure-dns.com 2603:1061:0:700::5NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2-05.azure-dns.net 150.171.21.5NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2-05.azure-dns.net 2620:1ec:8ec:700::5NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3-05.azure-dns.org 204.14.183.5NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3-05.azure-dns.org 2a01:111:4000:700::5NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns4-05.azure-dns.info 208.84.5.5NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns4-05.azure-dns.info 2620:1ec:bda:700::5NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2021070103 · primary ns1-05.azure-dns.com

Found

Primary (MNAME)
ns1-05.azure-dns.com
Contact (RNAME)
datacenter.dfs.de
Serial
2021070103
Refresh / retry
14400 s / 7200 s
Expire
1814400 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1-05.azure-dns.com (13.107.236.5)2021070103
ns1-05.azure-dns.com (2603:1061:0:700::5)2021070103
ns2-05.azure-dns.net (150.171.21.5)2021070103
ns2-05.azure-dns.net (2620:1ec:8ec:700::5)2021070103
ns3-05.azure-dns.org (204.14.183.5)2021070103
ns3-05.azure-dns.org (2a01:111:4000:700::5)2021070103
ns4-05.azure-dns.info (208.84.5.5)2021070103
ns4-05.azure-dns.info (2620:1ec:bda:700::5)2021070103

Checks

  • ✓ Serial 2021070103 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 2h, expire 21d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1-05.azure-dns.com is one of the listed nameservers.
  • ✓ Contact datacenter@dfs.de #25
    The SOA RNAME datacenter.dfs.de means datacenter@dfs.de.
  • ✓ Date-based serial #26
    The serial 2021070103 follows the YYYYMMDDnn convention (2021-07-01).

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

13 records at the apex

Found

Read from
13.107.236.5:53
TypeValueTTL
SOAns1-05.azure-dns.com. datacenter.dfs.de. 2021070103 14400 7200 1814400 8640028800
NSns1-05.azure-dns.com.28800
NSns2-05.azure-dns.net.28800
NSns3-05.azure-dns.org.28800
NSns4-05.azure-dns.info.28800
A194.49.206.0300
MX1 dfs-de.mail.protection.outlook.com.28800
TXT"v=spf1 ip4:194.49.177.3 ip4:194.49.171.50 ip4:212.132.115.62 ip4:85.214.238.71 ip4:85.215.170.60 ip4:20.113.185.228 ip4:20.113.168.208 include:spf.protection.outlook.com ip4:194.116.128.11 a:smtpw.cytric.net include:_relay.amadeus.com include:_spf.zimpel." "de -all"28800
TXT"HARICA-OFkkKdyJhFG73jb9zbT"28800
TXT"HARICA-BG370vgOxlCOqLDtZv3"28800
TXT"HARICA-2erqdI79HwYPrEmVCSz"28800
TXT"adobe-idp-site-verification=b3b7bc72e72de13d5e074347f226313672bc8d8601daacd08aae1f53375b44ae"28800
TXT"mindmanager-verification=2fe69332fa59df4034feafb6965c3479d103ae4e61da9dcd8d59ceefa9827f76"28800

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 8h, NS 8h. The NS TTL at the parent is 1d and in the zone 8h; 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