warnerbros.de

Checked 22 October 2026, 01:00 UTC · via 8.8.8.8
!Passed with warnings
20 passed 4 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

warn

ns1-b0.warnerbros.com, ns2-b0.warnerbros.com, ns3-b0.warnerbros.com, ns4-b0.warnerbros.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1-b0.warnerbros.com, ns2-b0.warnerbros.com, ns3-b0.warnerbros.com, ns4-b0.warnerbros.com
NS in the zone
ns1-b0.warnerbros.com, ns2-b0.warnerbros.com, ns3-b0.warnerbros.com, ns4-b0.warnerbros.com
NameserverAddressesNetwork (AS)Glue
ns1-b0.warnerbros.com205.251.192.167AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns2-b0.warnerbros.com205.251.194.239AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns3-b0.warnerbros.com205.251.197.148AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns4-b0.warnerbros.com205.251.198.223AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1-b0.warnerbros.com, ns2-b0.warnerbros.com, ns3-b0.warnerbros.com, ns4-b0.warnerbros.com.
  • ✓ 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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 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
  • i
    All nameserver names under .com
    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

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1-b0.warnerbros.com 205.251.192.167NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns2-b0.warnerbros.com 205.251.194.239NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3-b0.warnerbros.com 205.251.197.148NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns4-b0.warnerbros.com 205.251.198.223NOERROR, 9 ms, authoritativenoyes / yesrefused-

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.
  • ✓ 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

warn

serial 2016070800 · primary ns1-b0.warnerbros.com

Found

Primary (MNAME)
ns1-b0.warnerbros.com
Contact (RNAME)
wbol-hostmaster.warnerbros.com
Serial
2016070800
Refresh / retry
3600 s / 1800 s
Expire
604800 s
Negative TTL
60 s

Serial per nameserver

NameserverSerial
ns1-b0.warnerbros.com (205.251.192.167)2016070800
ns2-b0.warnerbros.com (205.251.194.239)2016070800
ns3-b0.warnerbros.com (205.251.197.148)2016070800
ns4-b0.warnerbros.com (205.251.198.223)2016070800

Checks

  • ✓ Serial 2016070800 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1h, retry 30m, expire 7d, negative TTL 1m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1-b0.warnerbros.com is one of the listed nameservers.
  • ✓ Contact wbol-hostmaster@warnerbros.com #25
    The SOA RNAME wbol-hostmaster.warnerbros.com means wbol-hostmaster@warnerbros.com.
  • ✓ Date-based serial #26
    The serial 2016070800 follows the YYYYMMDDnn convention (2016-07-08).

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

15 records at the apex

Found

Read from
205.251.192.167:53
TypeValueTTL
SOAns1-b0.warnerbros.com. wbol-hostmaster.warnerbros.com. 2016070800 3600 1800 604800 6060
NSns1-b0.warnerbros.com.60
NSns2-b0.warnerbros.com.60
NSns3-b0.warnerbros.com.60
NSns4-b0.warnerbros.com.60
A44.252.183.21460
A52.34.49.21560
MX10 laxmail2.wb.com.3600
MX20 mail1.wb.com.3600
MX20 mail2.wb.com.3600
MX20 mail3.wb.com.3600
TXT"_globalsign-domain-verification=SpARpNGyTErpfcMdeqeaJJYmorVi4mL-ccETXooO17"300
TXT"globalsign-domain-verification=E15985818076191CE08B1172D4AE33D1"300
TXT"google-site-verification=O_ZXAlvwlEc0KYaKEVhciC-J5kapFfXfGYeJNtiTF_0"300
TXT"google-site-verification=OvQTvNBeIDeY3Y2mumdfUks59o0Vj1ll9B0xiDs0hVE"300

Checks

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