stadtwerke-muenster.de

Checked 22 October 2026, 00:30 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 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

ns1a.dodns.net, ns2a.dodns.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1a.dodns.net, ns2a.dodns.net
NS in the zone
ns1a.dodns.net, ns2a.dodns.net
NameserverAddressesNetwork (AS)Glue
ns1a.dodns.net217.160.82.254 2001:8d8:fe:53:217:160:82:254AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns2a.dodns.net185.132.35.254 2607:f1c0:fe:53:185:132:35:254AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1a.dodns.net, ns2a.dodns.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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 2 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 2 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1a.dodns.net 217.160.82.254NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1a.dodns.net 2001:8d8:fe:53:217:160:82:254NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2a.dodns.net 185.132.35.254NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2a.dodns.net 2607:f1c0:fe:53:185:132:35:254NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1a.dodns.net: "Served by PowerDNS - https://www.powerdns.com/"; ns2a.dodns.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

warn

serial 2024073170 · primary ns1a.dodns.net

Found

Primary (MNAME)
ns1a.dodns.net
Contact (RNAME)
hostmaster.itemsnet.de
Serial
2024073170
Refresh / retry
86400 s / 10800 s
Expire
3600000 s
Negative TTL
172800 s

Serial per nameserver

NameserverSerial
ns1a.dodns.net (217.160.82.254)2024073170
ns1a.dodns.net (2001:8d8:fe:53:217:160:82:254)2024073170
ns2a.dodns.net (185.132.35.254)2024073170
ns2a.dodns.net (2607:f1c0:fe:53:185:132:35:254)2024073170

Checks

  • ✓ Serial 2024073170 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 2d is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1d, retry 3h, expire 1000h, negative TTL 2d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1a.dodns.net is one of the listed nameservers.
  • ✓ Contact hostmaster@itemsnet.de #25
    The SOA RNAME hostmaster.itemsnet.de means hostmaster@itemsnet.de.
  • ✓ Date-based serial #26
    The serial 2024073170 follows the YYYYMMDDnn convention (2024-07-31).

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
217.160.82.254:53
TypeValueTTL
SOAns1a.dodns.net. hostmaster.itemsnet.de. 2024073170 86400 10800 3600000 1728003600
NSns1a.dodns.net.3600
NSns2a.dodns.net.3600
A20.160.195.54600
MX10 mail.stadtwerke-muenster.de.3600
MX10 mail2.stadtwerke-muenster.de.3600
MX5 stadtwerke-muenster-de.mail.cloud.nospamproxy.com.3600
TXT"_804tu1itnsfqo7bu2wn4jftknhkhham"3600
TXT"v=spf1 include:agenturserver.de include:spf-a.mymxserver.com include:spf.items-web.de include:spf-b.mymxserver.com include:spf-c.mymxserver.com include:spf.mailjet.com include:_spf.kundenserver.de ip4:87.118.116.204 ip4:87.118.117.204 include:spf.protecti" "on.outlook.com ip4:52.174.36.153 ip4:20.93.129.239 ip4:212.34.64.185 include:spf.stadtwerke-muenster-de.cloud.nospamproxy.com include:spf.mandrillapp.com include:spf.mailjet.com -all"3600
TXT"apple-domain-verification=lS9mN0GENaK0LFS2"3600
TXT"a7jCX5tgKzbvQElXkZodhEFsWxg7oGPJ0TaV3cdeTKwtIfgSj91eesfjYaNLED6icOQW14Mi9yzEsiOGz5rssw=="3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 1h, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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.
  • 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