come-on.de

Checked 21 October 2026, 22:10 UTC · via 8.8.8.8
!Passed with warnings
20 passed 1 warning 0 failed 8 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

ns00.mzv.net, ns01.mzv.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns00.mzv.net, ns01.mzv.net
NS in the zone
ns00.mzv.net, ns01.mzv.net
NameserverAddressesNetwork (AS)Glue
ns00.mzv.net217.160.80.161AS8560 IONOS-AS - IONOS SE, DE-
ns01.mzv.net217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns00.mzv.net, ns01.mzv.net.
    #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 1 IPv6 /48.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS8560 (IONOS-AS - IONOS SE, DE): 3 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 .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: ns00.mzv.net.
    #13

Nameservers

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns00.mzv.net 217.160.80.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns01.mzv.net 217.160.81.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns01.mzv.net 2001:8d8:fe:53:217:160:81:161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 3 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: ns00.mzv.net: "Served by PowerDNS - https://www.powerdns.com/"; ns01.mzv.net: "Served by PowerDNS - https://www.powerdns.com/".
    #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 2025091707 · primary ns00.mzv.net

Found

Primary (MNAME)
ns00.mzv.net
Contact (RNAME)
dns.wa.de
Serial
2025091707
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns00.mzv.net (217.160.80.161)2025091707
ns01.mzv.net (217.160.81.161)2025091707
ns01.mzv.net (2001:8d8:fe:53:217:160:81:161)2025091707

Checks

  • ✓ Serial 2025091707 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns00.mzv.net is one of the listed nameservers.
  • ✓ Contact dns@wa.de #25
    The SOA RNAME dns.wa.de means dns@wa.de.
  • ✓ Date-based serial #26
    The serial 2025091707 follows the YYYYMMDDnn convention (2025-09-17).

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

11 records at the apex

Found

Read from
217.160.80.161:53
TypeValueTTL
SOAns00.mzv.net. dns.wa.de. 2025091707 43200 7200 1209600 8640086400
NSns00.mzv.net.86400
NSns01.mzv.net.86400
A193.30.29.24186400
MX100 comeon-de01b.mail.protection.outlook.com.600
TXT"amazonses:wxXPtwFIX+tkajDWKlfSMDXURh2UwWua7cNQqqkVm/Y="600
TXT"google-site-verification=sEZCYaMoxktVlVzchUVstqBlYkMcr_f1uBE_YD-vHd8"600
TXT"MS=ms63381887"600
TXT"google-site-verification=ypPyjt3TpOE1MjOQ7w6SPTu4QFpqhgsRVwSNWEvx4jw"600
TXT"v=spf1 mx ip4:88.208.189.14/32 ip4:92.50.97.238/32 include:spf.protection.outlook.com include:spf.ippen-media.de -all"600
TXT"facebook-domain-verification=zsqiban07p7mp79oc0etb164howrae"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 10m, 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