muc.de

Checked 21 October 2026, 23:30 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 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

info

ns.space.net, ns1.muc.de, ns3.dns.space.net, ns4.dns.space.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.space.net, ns1.muc.de, ns3.dns.space.net, ns4.dns.space.net
NS in the zone
ns.space.net, ns1.muc.de, ns3.dns.space.net, ns4.dns.space.net
NameserverAddressesNetwork (AS)Glue
ns.space.net195.30.0.10 2001:608:0:a::1AS5539 SPACENET - SpaceNet AG, DE AS5539 SPACENET - SpaceNet AG, DE-
ns1.muc.de193.149.48.1 2001:608:1000::1AS5539 SPACENET - SpaceNet AG, DE AS5539 SPACENET - SpaceNet AG, DE193.149.48.1 2001:608:1000::1
ns3.dns.space.net193.149.44.49 2001:608:0:f0f::fAS5539 SPACENET - SpaceNet AG, DE AS5539 SPACENET - SpaceNet AG, DE-
ns4.dns.space.net194.97.129.1 2001:608:0:b::1AS5539 SPACENET - SpaceNet AG, DE AS5539 SPACENET - SpaceNet AG, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns.space.net, ns1.muc.de, ns3.dns.space.net, ns4.dns.space.net.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns1.muc.de.
  • ✓ 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 4 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS5539 (SPACENET - SpaceNet AG, DE): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.space.net 195.30.0.10NOERROR, 12 ms, authoritativenoyes / yesrefusedKnot DNS 3.6.0
ns.space.net 2001:608:0:a::1NOERROR, 12 ms, authoritativenoyes / yesrefusedKnot DNS 3.6.0
ns1.muc.de 193.149.48.1NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns1.muc.de 2001:608:1000::1NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns3.dns.space.net 193.149.44.49NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns3.dns.space.net 2001:608:0:f0f::fNOERROR, 4 ms, authoritativenoyes / yesrefused-
ns4.dns.space.net 194.97.129.1NOERROR, 12 ms, authoritativenoyes / yesrefused9.20.24
ns4.dns.space.net 2001:608:0:b::1NOERROR, 11 ms, authoritativenoyes / yesrefused9.20.24

Checks

  • ✓ All respond #14
    All 8 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns.space.net: "Knot DNS 3.6.0"; ns4.dns.space.net: "9.20.24". Hide or replace the version string.
    #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 2026071901 · primary ns1.muc.de

Found

Primary (MNAME)
ns1.muc.de
Contact (RNAME)
postmaster.muc.de
Serial
2026071901
Refresh / retry
10800 s / 3600 s
Expire
3600000 s
Negative TTL
81400 s

Serial per nameserver

NameserverSerial
ns.space.net (195.30.0.10)2026071901
ns.space.net (2001:608:0:a::1)2026071901
ns1.muc.de (193.149.48.1)2026071901
ns1.muc.de (2001:608:1000::1)2026071901
ns3.dns.space.net (193.149.44.49)2026071901
ns3.dns.space.net (2001:608:0:f0f::f)2026071901
ns4.dns.space.net (194.97.129.1)2026071901
ns4.dns.space.net (2001:608:0:b::1)2026071901

Checks

  • ✓ Serial 2026071901 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 1000h, negative TTL 22h36m40s.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.muc.de is one of the listed nameservers.
  • ✓ Contact postmaster@muc.de #25
    The SOA RNAME postmaster.muc.de means postmaster@muc.de.
  • ✓ Date-based serial #26
    The serial 2026071901 follows the YYYYMMDDnn convention (2026-07-19).

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

10 records at the apex

Found

Read from
195.30.0.10:53
TypeValueTTL
SOAns1.muc.de. postmaster.muc.de. 2026071901 10800 3600 3600000 814001800
NSns.space.net.86400
NSns1.muc.de.86400
NSns3.dns.space.net.86400
NSns4.dns.space.net.86400
A193.149.48.186400
AAAA2001:608:1000::186400
MX15000 mx3.muc.de.900
TXT"v=spf1 a:mail.muc.de ip6:2001:608:1000::3 -all"86400
TXT"google-site-verification=vBuW7o3Ux5B6alCYYEkfV1jmeWGhBHt9U0xNyAI_wUQ"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, AAAA 1d, MX 15m, 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