gabler.de

Checked 21 October 2026, 22:32 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

pass

ns37.ultradns2.com, ns37.ultradns2.org, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns37.ultradns2.com, ns37.ultradns2.org, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org
NS in the zone
ns37.ultradns2.com, ns37.ultradns2.org, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org
NameserverAddressesNetwork (AS)Glue
ns37.ultradns2.com204.74.104.37 2610:a1:3125::53AS399153 SECURITYSERVICES - Vercara, LLC, US AS399155 SECURITYSERVICES - Vercara, LLC, US-
ns37.ultradns2.org204.74.106.37 2610:a1:3225::53AS399154 SECURITYSERVICES - Vercara, LLC, US AS399154 SECURITYSERVICES - Vercara, LLC, US-
pdns1.ultradns.net204.74.108.1 2001:502:f3ff::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns2.ultradns.net204.74.109.1 2610:a1:1014::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns3.ultradns.org199.7.68.1 2610:a1:1015::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • ✓ 5 nameservers #6
    Delegated to ns37.ultradns2.com, ns37.ultradns2.org, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org.
  • ✓ 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 5 IPv4 /24s and 5 IPv6 /48s.
  • ✓ 4 autonomous systems #11
    The nameservers are spread over: AS12008 (VERCARA - Vercara, LLC, US): 6 addresses; AS399153 (SECURITYSERVICES - Vercara, LLC, US): 1 address; AS399154 (SECURITYSERVICES - Vercara, LLC, US): 2 addresses; AS399155 (SECURITYSERVICES - Vercara, LLC, US): 1 address.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .com, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

10 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns37.ultradns2.com 204.74.104.37NOERROR, 20 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
ns37.ultradns2.com 2610:a1:3125::53NOERROR, 20 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
ns37.ultradns2.org 204.74.106.37NOERROR, 14 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
ns37.ultradns2.org 2610:a1:3225::53NOERROR, 14 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns1.ultradns.net 204.74.108.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns1.ultradns.net 2001:502:f3ff::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns2.ultradns.net 204.74.109.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns2.ultradns.net 2610:a1:1014::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns3.ultradns.org 199.7.68.1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns3.ultradns.org 2610:a1:1015::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

Checks

  • ✓ All respond #14
    All 10 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: ns37.ultradns2.com: "UltraDNS Nameserver"; ns37.ultradns2.org: "UltraDNS Nameserver"; pdns1.ultradns.net: "UltraDNS Nameserver"; pdns2.ultradns.net: "UltraDNS Nameserver"; pdns3.ultradns.org: "UltraDNS Nameserver".
    #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 2025121208 · primary pdns1.ultradns.net

Found

Primary (MNAME)
pdns1.ultradns.net
Contact (RNAME)
hostmaster.springernature.com
Serial
2025121208
Refresh / retry
7200 s / 900 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns37.ultradns2.com (204.74.104.37)2025121208
ns37.ultradns2.com (2610:a1:3125::53)2025121208
ns37.ultradns2.org (204.74.106.37)2025121208
ns37.ultradns2.org (2610:a1:3225::53)2025121208
pdns1.ultradns.net (204.74.108.1)2025121208
pdns1.ultradns.net (2001:502:f3ff::1)2025121208
pdns2.ultradns.net (204.74.109.1)2025121208
pdns2.ultradns.net (2610:a1:1014::1)2025121208
pdns3.ultradns.org (199.7.68.1)2025121208
pdns3.ultradns.org (2610:a1:1015::1)2025121208

Checks

  • ✓ Serial 2025121208 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver pdns1.ultradns.net is one of the listed nameservers.
  • ✓ Contact hostmaster@springernature.com #25
    The SOA RNAME hostmaster.springernature.com means hostmaster@springernature.com.
  • ✓ Date-based serial #26
    The serial 2025121208 follows the YYYYMMDDnn convention (2025-12-12).

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

14 records at the apex

Found

Read from
204.74.104.37:53
TypeValueTTL
SOApdns1.ultradns.net. hostmaster.springernature.com. 2025121208 7200 900 604800 360086400
NSns37.ultradns2.com.86400
NSns37.ultradns2.org.86400
NSpdns1.ultradns.net.86400
NSpdns2.ultradns.net.86400
NSpdns3.ultradns.org.86400
A45.157.232.3586400
MX10 gabler.de.s200a1.psmtp.com.43200
MX20 gabler.de.s200a2.psmtp.com.43200
MX30 gabler.de.s200b1.psmtp.com.43200
MX40 gabler.de.s200b2.psmtp.com.43200
TXT"3fyE/ewLIyQ6/W2jahpJuf5XUAMgbJq4CPUSwmW0zQo="86400
TXT"google-site-verification=R8HN7yjxJIIMrRTjwmzjAVBVtixeEH-uqB-n6SOeZek"86400
TXT"google-site-verification=lBy5CRoLU8r2vuHa1VuK9RHCnkQ4O9_12OR1-_3I38c"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 12h, NS 1d.
  • ✓ 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