stiftung-warentest.de

Checked 22 October 2026, 00:31 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 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

anycast.iwelt.de, anycast2.iwelt.domains

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
anycast.iwelt.de, anycast2.iwelt.domains
NS in the zone
anycast.iwelt.de, anycast2.iwelt.domains
NameserverAddressesNetwork (AS)Glue
anycast.iwelt.de192.174.68.102 2001:67c:1bc::102AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-
anycast2.iwelt.domains176.97.158.102 2001:67c:10b8::102AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: anycast.iwelt.de, anycast2.iwelt.domains.
    #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 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 4 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 2 TLDs #12
    Nameserver names use the TLDs .de, .domains.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
anycast.iwelt.de 192.174.68.102NOERROR, 3 ms, authoritativenoyes / yesrefusedRcodeZero DNS
anycast.iwelt.de 2001:67c:1bc::102NOERROR, 4 ms, authoritativenoyes / yesrefusedRcodeZero DNS
anycast2.iwelt.domains 176.97.158.102NOERROR, 13 ms, authoritativenoyes / yesrefusedreg-wie1
anycast2.iwelt.domains 2001:67c:10b8::102NOERROR, 15 ms, authoritativenoyes / yesrefusedreg-wie1

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: anycast.iwelt.de: "RcodeZero DNS"; anycast2.iwelt.domains: "reg-wie1".
    #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 2026101501 · primary anycast.iwelt.de

Found

Primary (MNAME)
anycast.iwelt.de
Contact (RNAME)
domainmaster.iwelt-ag.net
Serial
2026101501
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
anycast.iwelt.de (192.174.68.102)2026101501
anycast.iwelt.de (2001:67c:1bc::102)2026101501
anycast2.iwelt.domains (176.97.158.102)2026101501
anycast2.iwelt.domains (2001:67c:10b8::102)2026101501

Checks

  • ✓ Serial 2026101501 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 2h, expire 14d, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver anycast.iwelt.de is one of the listed nameservers.
  • ✓ Contact domainmaster@iwelt-ag.net #25
    The SOA RNAME domainmaster.iwelt-ag.net means domainmaster@iwelt-ag.net.
  • ✓ Date-based serial #26
    The serial 2026101501 follows the YYYYMMDDnn convention (2026-10-15).

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
192.174.68.102:53
TypeValueTTL
SOAanycast.iwelt.de. domainmaster.iwelt-ag.net. 2026101501 43200 7200 1209600 180180
NSanycast.iwelt.de.180
NSanycast2.iwelt.domains.180
A20.31.101.169600
MX10 mx01.hornetsecurity.com.180
MX20 mx02.hornetsecurity.com.180
MX30 mx03.hornetsecurity.com.180
MX40 mx04.hornetsecurity.com.180
TXT"MS=ms77483956"180
TXT"b0Lixpu1l+rG9sFvTqPQMLAh45ai2/SeIpXmCsEGnP8="180
TXT"docusign=7dc802e7-577a-4177-ae33-2d55f8302afa"180
TXT"atlassian-sending-domain-verification=0b8cc424-c9f8-4766-9360-372ae4e610b5"180
TXT"bMc0QVkM/uKv8+b5zKroSz0UfCeiy2oqelM2im4eQ8osilgolVAR5MRps3zOEU2j8kI4Ql2TY+M85egZ+FWwEQ=="180
TXT"adobe-idp-site-verification=1d274c0e6ef9deea51266bf5961f64dba13cf4c487fe7a52716b66436fa662b7"180
TXT"atlassian-domain-verification=B6tTZUEQQt0wVYrmOuRrknYOQ0favR1trBATaROWNWZa7j/bSA6MM8vOIBm7NJ97"180
TXT"v=spf1 include:spf.hornetsecurity.com include:_spf.tivian.com include:amazonses.com include:_spf.zimpel.de ip4:51.124.1.131 ~all"180
CAA0 issue "amazon.com"180
CAA0 issue "comodoca.com"180
CAA0 issue "digicert.com"180
CAA0 issue "globalsign.com"180
CAA0 issue "letsencrypt.org"180
CAA0 issue "sectigo.com"180

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (3m), NS (3m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 3m; 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: amazon.com, comodoca.com, digicert.com, globalsign.com, letsencrypt.org, sectigo.com.