vzbv.de

Checked 22 October 2026, 01:00 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 0 failed 6 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

auth04.ns.de.uu.net, auth40.ns.uu.net, auth54.ns.de.uu.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
auth04.ns.de.uu.net, auth40.ns.uu.net, auth54.ns.de.uu.net
NS in the zone
auth04.ns.de.uu.net, auth40.ns.uu.net, auth54.ns.de.uu.net
NameserverAddressesNetwork (AS)Glue
auth04.ns.de.uu.net192.76.144.17 2001:600:1c0:e000::35:9AS702 UUNET - Verizon Business, US AS702 UUNET - Verizon Business, US-
auth40.ns.uu.net198.6.1.18AS701 UUNET - Verizon Business, US-
auth54.ns.de.uu.net194.128.171.100 2001:600:1c0:e001::35:9AS702 UUNET - Verizon Business, US AS702 UUNET - Verizon Business, US-

Checks

  • ✓ 3 nameservers #6
    Delegated to auth04.ns.de.uu.net, auth40.ns.uu.net, auth54.ns.de.uu.net.
  • ✓ 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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:600:1c0::/48, while the other address family is spread over several networks.
    #10
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS701 (UUNET - Verizon Business, US): 1 address; AS702 (UUNET - Verizon Business, US): 4 addresses.
  • i
    All nameserver names under .net
    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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: auth40.ns.uu.net.
    #13

Nameservers

pass

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
auth04.ns.de.uu.net 192.76.144.17NOERROR, 8 ms, authoritativenoyes / yesrefused-
auth04.ns.de.uu.net 2001:600:1c0:e000::35:9NOERROR, 8 ms, authoritativenoyes / yesrefused-
auth40.ns.uu.net 198.6.1.18NOERROR, 99 ms, authoritativenoyes / yesrefused-
auth54.ns.de.uu.net 194.128.171.100NOERROR, 19 ms, authoritativenoyes / yesrefused-
auth54.ns.de.uu.net 2001:600:1c0:e001::35:9NOERROR, 23 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 5 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 2026102102 · primary auth04.ns.de.uu.net

Found

Primary (MNAME)
auth04.ns.de.uu.net
Contact (RNAME)
hostmaster.de.uu.net
Serial
2026102102
Refresh / retry
28800 s / 7200 s
Expire
2678400 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
auth04.ns.de.uu.net (192.76.144.17)2026102102
auth04.ns.de.uu.net (2001:600:1c0:e000::35:9)2026102102
auth40.ns.uu.net (198.6.1.18)2026102102
auth54.ns.de.uu.net (194.128.171.100)2026102102
auth54.ns.de.uu.net (2001:600:1c0:e001::35:9)2026102102

Checks

  • ✓ Serial 2026102102 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 31d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver auth04.ns.de.uu.net is one of the listed nameservers.
  • ✓ Contact hostmaster@de.uu.net #25
    The SOA RNAME hostmaster.de.uu.net means hostmaster@de.uu.net.
  • ✓ Date-based serial #26
    The serial 2026102102 follows the YYYYMMDDnn convention (2026-10-21).

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

12 records at the apex

Found

Read from
192.76.144.17:53
TypeValueTTL
SOAauth04.ns.de.uu.net. hostmaster.de.uu.net. 2026102102 28800 7200 2678400 180086400
NSauth54.ns.de.uu.net.86400
NSauth04.ns.de.uu.net.86400
NSauth40.ns.uu.net.86400
A213.187.93.25300
MX200 cust1346-2.in.mailcontrol.com.300
MX100 cust1346-1.in.mailcontrol.com.300
TXT"apple-domain-verification=RZ2Om7p2k1TUIXkK"300
TXT"google-site-verification=nTGjxwD3KRRSHGNy-9wVpmikhCCC4tBNdFxM5831Um8"300
TXT"MS=42184D699FF1D019D4E4821E6A0E6FBFB6C8B5D6"300
TXT"Generated by Verizon DNSTool V 2.9"300
TXT"v=spf1 ip4:213.203.238.6 ip4:144.76.135.147 ip4:159.169.224.50 ip6:2a01:4f8:d0a:6545::2 include:mailcontrol.com include:spf.protection.outlook.com include:verbraucherzentrale-energieberatung.de -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, 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