alphafield.de

Checked 21 October 2026, 21:28 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 warnings 0 failed 7 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

ns1.dyna-ns.net, ns2.dyna-ns.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.dyna-ns.net, ns2.dyna-ns.net
NS in the zone
ns1.dyna-ns.net, ns2.dyna-ns.net
NameserverAddressesNetwork (AS)Glue
ns1.dyna-ns.net162.159.26.92 162.159.27.158 2400:cb00:2049:1::a29f:1a5c 2400:cb00:2049:1::a29f:1b9eAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
ns2.dyna-ns.net162.159.24.5 162.159.25.5 2400:cb00:2049:1::a29f:1805 2400:cb00:2049:1::a29f:1905AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.dyna-ns.net, ns2.dyna-ns.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.
  • i
    One address family in one network
    all IPv6 addresses are in 2400:cb00:2049::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 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
  • 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

warn

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.dyna-ns.net 162.159.26.92NOERROR, 168 ms, authoritativenoyes / yesrefused2026.10.8
ns1.dyna-ns.net 162.159.27.158NOERROR, 169 ms, authoritativenoyes / yesrefused2026.10.8
ns1.dyna-ns.net 2400:cb00:2049:1::a29f:1a5cNOERROR, 174 ms, authoritativenoyes / yesrefused2026.10.8
ns1.dyna-ns.net 2400:cb00:2049:1::a29f:1b9eNOERROR, 165 ms, authoritativenoyes / yesrefused2026.10.8
ns2.dyna-ns.net 162.159.24.5NOERROR, 94 ms, authoritativenoyes / yesrefused2026.10.8
ns2.dyna-ns.net 162.159.25.5NOERROR, 96 ms, authoritativenoyes / yesrefused2026.10.8
ns2.dyna-ns.net 2400:cb00:2049:1::a29f:1805NOERROR, 96 ms, authoritativenoyes / yesrefused2026.10.8
ns2.dyna-ns.net 2400:cb00:2049:1::a29f:1905NOERROR, 95 ms, authoritativenoyes / yesrefused2026.10.8

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: ns1.dyna-ns.net: "2026.10.8"; ns2.dyna-ns.net: "2026.10.8". 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 2026030402 · primary ns1.dyna-ns.net

Found

Primary (MNAME)
ns1.dyna-ns.net
Contact (RNAME)
hostmaster.alphafield.de
Serial
2026030402
Refresh / retry
16384 s / 2048 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.dyna-ns.net (162.159.26.92)2026030402
ns1.dyna-ns.net (162.159.27.158)2026030402
ns1.dyna-ns.net (2400:cb00:2049:1::a29f:1a5c)2026030402
ns1.dyna-ns.net (2400:cb00:2049:1::a29f:1b9e)2026030402
ns2.dyna-ns.net (162.159.24.5)2026030402
ns2.dyna-ns.net (162.159.25.5)2026030402
ns2.dyna-ns.net (2400:cb00:2049:1::a29f:1805)2026030402
ns2.dyna-ns.net (2400:cb00:2049:1::a29f:1905)2026030402

Checks

  • ✓ Serial 2026030402 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h33m4s, retry 34m8s, expire 14d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.dyna-ns.net is one of the listed nameservers.
  • ✓ Contact hostmaster@alphafield.de #25
    The SOA RNAME hostmaster.alphafield.de means hostmaster@alphafield.de.
  • ✓ Date-based serial #26
    The serial 2026030402 follows the YYYYMMDDnn convention (2026-03-04).

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

4 records at the apex

Found

Read from
162.159.26.92:53
TypeValueTTL
SOAns1.dyna-ns.net. hostmaster.alphafield.de. 2026030402 16384 2048 1209600 300300
NSns2.dyna-ns.net.300
NSns1.dyna-ns.net.300
A194.180.176.119300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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