videobuster.de

Checked 22 October 2026, 00:51 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 2 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.first-ns.de, ns2.he.net, ns3.he.net, ns4.he.net, robotns2.second-ns.de, robotns3.second-ns.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.first-ns.de, ns2.he.net, ns3.he.net, ns4.he.net, robotns2.second-ns.de, robotns3.second-ns.com
NS in the zone
ns1.first-ns.de, ns1.he.net, ns2.he.net, ns3.he.net, ns4.he.net, ns5.he.net, robotns2.second-ns.de, robotns3.second-ns.com
NameserverAddressesNetwork (AS)Glue
ns1.first-ns.de213.239.242.238 2a01:4f8:0:a101::a:1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns1.he.net (zone only)216.218.130.2 2001:470:100::2AS6939 HURRICANE - Hurricane Electric LLC, US AS6939 HURRICANE - Hurricane Electric LLC, US-
ns2.he.net216.218.131.2 2001:470:200::2AS6939 HURRICANE - Hurricane Electric LLC, US AS6939 HURRICANE - Hurricane Electric LLC, US-
ns3.he.net216.218.132.2 2001:470:300::2AS6939 HURRICANE - Hurricane Electric LLC, US AS6939 HURRICANE - Hurricane Electric LLC, US-
ns4.he.net216.66.1.2 2001:470:400::2AS6939 HURRICANE - Hurricane Electric LLC, US AS6939 HURRICANE - Hurricane Electric LLC, US-
ns5.he.net (zone only)216.66.80.18 2001:470:500::2AS6939 HURRICANE - Hurricane Electric LLC, US AS6939 HURRICANE - Hurricane Electric LLC, US-
robotns2.second-ns.de213.133.100.103 2a01:4f8:0:1::5ddc:2AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
robotns3.second-ns.com193.47.99.3 2001:67c:192c::add:a3AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE-

Checks

  • ✓ 6 nameservers #6
    Delegated to ns1.first-ns.de, ns2.he.net, ns3.he.net, ns4.he.net, robotns2.second-ns.de, robotns3.second-ns.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns1.he.net, ns5.he.net. ns1.first-ns.de, ns1.he.net, ns2.he.net, ns3.he.net, ns4.he.net, ns5.he.net, robotns2.second-ns.de, robotns3.second-ns.com report NS ns1.first-ns.de ns1.he.net ns2.he.net ns3.he.net ns4.he.net ns5.he.net robotns2.second-ns.de robotns3.second-ns.com.
    #7
  • ✓ 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 8 IPv4 /24s and 7 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS12337 (NORIS-NETWORK - noris network AG, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 4 addresses; AS6939 (HURRICANE - Hurricane Electric LLC, US): 10 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .com, .de, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

16 of 16 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.first-ns.de 213.239.242.238NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns1.first-ns.de 2a01:4f8:0:a101::a:1NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns1.he.net 216.218.130.2NOERROR, 30 ms, authoritativenoyes / yesrefused-
ns1.he.net 2001:470:100::2NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns2.he.net 216.218.131.2NOERROR, 30 ms, authoritativenoyes / yesrefused-
ns2.he.net 2001:470:200::2NOERROR, 31 ms, authoritativenoyes / yesrefused-
ns3.he.net 216.218.132.2NOERROR, 30 ms, authoritativenoyes / yesrefused-
ns3.he.net 2001:470:300::2NOERROR, 31 ms, authoritativenoyes / yesrefused-
ns4.he.net 216.66.1.2NOERROR, 30 ms, authoritativenoyes / yesrefused-
ns4.he.net 2001:470:400::2NOERROR, 31 ms, authoritativenoyes / yesrefused-
ns5.he.net 216.66.80.18NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns5.he.net 2001:470:500::2NOERROR, 9 ms, authoritativenoyes / yesrefused-
robotns2.second-ns.de 213.133.100.103NOERROR, 2 ms, authoritativenoyes / yesrefused-
robotns2.second-ns.de 2a01:4f8:0:1::5ddc:2NOERROR, 1 ms, authoritativenoyes / yesrefused-
robotns3.second-ns.com 193.47.99.3NOERROR, 6 ms, authoritativenoyes / yesrefused-
robotns3.second-ns.com 2001:67c:192c::add:a3NOERROR, 6 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 16 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 2026102201 · primary ns1.first-ns.de

Found

Primary (MNAME)
ns1.first-ns.de
Contact (RNAME)
postmaster.videobuster.de
Serial
2026102201
Refresh / retry
240 s / 30 s
Expire
3600000 s
Negative TTL
120 s

Serial per nameserver

NameserverSerial
ns1.first-ns.de (213.239.242.238)2026102201
ns1.first-ns.de (2a01:4f8:0:a101::a:1)2026102201
ns1.he.net (216.218.130.2)2026102201
ns1.he.net (2001:470:100::2)2026102201
ns2.he.net (216.218.131.2)2026102201
ns2.he.net (2001:470:200::2)2026102201
ns3.he.net (216.218.132.2)2026102201
ns3.he.net (2001:470:300::2)2026102201
ns4.he.net (216.66.1.2)2026102201
ns4.he.net (2001:470:400::2)2026102201
ns5.he.net (216.66.80.18)2026102201
ns5.he.net (2001:470:500::2)2026102201
robotns2.second-ns.de (213.133.100.103)2026102201
robotns2.second-ns.de (2a01:4f8:0:1::5ddc:2)2026102201
robotns3.second-ns.com (193.47.99.3)2026102201
robotns3.second-ns.com (2001:67c:192c::add:a3)2026102201

Checks

  • ✓ Serial 2026102201 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 4m is outside 20m–1d; negative caching TTL (minimum) 2m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 4m, retry 30s, expire 1000h, negative TTL 2m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.first-ns.de is one of the listed nameservers.
  • ✓ Contact postmaster@videobuster.de #25
    The SOA RNAME postmaster.videobuster.de means postmaster@videobuster.de.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

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

pass

23 records at the apex

Found

Read from
213.239.242.238:53
TypeValueTTL
SOAns1.first-ns.de. postmaster.videobuster.de. 2026102201 240 30 3600000 120240
NSns5.he.net.300
NSrobotns2.second-ns.de.300
NSrobotns3.second-ns.com.300
NSns1.first-ns.de.300
NSns1.he.net.300
NSns2.he.net.300
NSns3.he.net.300
NSns4.he.net.300
A188.34.148.43300
A188.34.148.42300
AAAA2a01:4f8:fff0:91::148:43300
AAAA2a01:4f8:fff0:91::148:42300
MX3 mx1179.videobuster.de.300
TXT"v=spf1 ip4:87.139.140.3 ip6:2003:a:c0b:f600::/56 ip4:188.34.148.40/29 ip6:2a01:4f8:fff0:91::/64 ip4:49.13.249.80/28 a:spf.mas.t-systems-service.com ~all"300
TXT"MS=ms20004053"300
TXT"abuseipdb-verification=b33HvQIG"300
TXT"facebook-domain-verification=vx5tq5ge8es89r927lmc5xmzpwmrtd"300
TXT"google-site-verification=5s1rcpobEn90rG3B-2nw7F49QI9PDZpgAED-t2Fb1-o"300
TXT"google-site-verification=9mTtTBmc0bDBQhfrbsbdtW2sKuYVHiTJl5un32T2jFw"300
TXT"google-site-verification=OlK9vN_uShEwZBzxuHZYmptiC_7sy9ltvZYUch-1pTo"300
TXT"google-site-verification=Uw1pp_Iq07EJudLJA8hGJP1iOl0rPOaMt00rzv2BTOY"300
CAA128 issue "letsencrypt.org"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org.