peterhahn.de

Checked 21 October 2026, 23:50 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 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

diva.ns.cloudflare.com, joel.ns.cloudflare.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
diva.ns.cloudflare.com, joel.ns.cloudflare.com
NS in the zone
diva.ns.cloudflare.com, joel.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
diva.ns.cloudflare.com108.162.192.97 172.64.32.97 173.245.58.97 2606:4700:50::adf5:3a61 2803:f800:50::6ca2:c061 2a06:98c1:50::ac40:2061AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
joel.ns.cloudflare.com172.64.33.184 173.245.59.184 108.162.193.184 2803:f800:50::6ca2:c1b8 2a06:98c1:50::ac40:21b8 2606:4700:58::adf5:3bb8AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 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: diva.ns.cloudflare.com, joel.ns.cloudflare.com.
    #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 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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 .com
    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

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
diva.ns.cloudflare.com 108.162.192.97NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
diva.ns.cloudflare.com 172.64.32.97NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
diva.ns.cloudflare.com 173.245.58.97NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
diva.ns.cloudflare.com 2606:4700:50::adf5:3a61NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
diva.ns.cloudflare.com 2803:f800:50::6ca2:c061NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
diva.ns.cloudflare.com 2a06:98c1:50::ac40:2061NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
joel.ns.cloudflare.com 172.64.33.184NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
joel.ns.cloudflare.com 173.245.59.184NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
joel.ns.cloudflare.com 108.162.193.184NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
joel.ns.cloudflare.com 2803:f800:50::6ca2:c1b8NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
joel.ns.cloudflare.com 2a06:98c1:50::ac40:21b8NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
joel.ns.cloudflare.com 2606:4700:58::adf5:3bb8NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✓ All respond #14
    All 12 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: diva.ns.cloudflare.com: "2026.10.2"; joel.ns.cloudflare.com: "2026.10.2". 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 2416505414 · primary diva.ns.cloudflare.com

Found

Primary (MNAME)
diva.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2416505414
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
diva.ns.cloudflare.com (108.162.192.97)2416505414
diva.ns.cloudflare.com (172.64.32.97)2416505414
diva.ns.cloudflare.com (173.245.58.97)2416505414
diva.ns.cloudflare.com (2606:4700:50::adf5:3a61)2416505414
diva.ns.cloudflare.com (2803:f800:50::6ca2:c061)2416505414
diva.ns.cloudflare.com (2a06:98c1:50::ac40:2061)2416505414
joel.ns.cloudflare.com (172.64.33.184)2416505414
joel.ns.cloudflare.com (173.245.59.184)2416505414
joel.ns.cloudflare.com (108.162.193.184)2416505414
joel.ns.cloudflare.com (2803:f800:50::6ca2:c1b8)2416505414
joel.ns.cloudflare.com (2a06:98c1:50::ac40:21b8)2416505414
joel.ns.cloudflare.com (2606:4700:58::adf5:3bb8)2416505414

Checks

  • ✓ Serial 2416505414 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver diva.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2416505414 is a Unix timestamp (2046-07-29 19:30 UTC).

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

pass

35 records at the apex

Found

Read from
108.162.192.97:53
TypeValueTTL
SOAdiva.ns.cloudflare.com. dns.cloudflare.com. 2416505414 10000 2400 604800 18001800
NSdiva.ns.cloudflare.com.86400
NSjoel.ns.cloudflare.com.86400
A104.17.81.195300
A104.17.82.195300
AAAA2606:4700::6811:51c3300
AAAA2606:4700::6811:52c3300
MX160 mail01.peterhahn.de.300
MX160 mail02.peterhahn.de.300
TXT"MS=5DC0A331627911348FAEE773B15512C4B8FAAE9E"300
TXT"MS=ms89699227"300
TXT"UUdial Office"300
TXT"aY65vuAfKbJbGhf7jq7sGjkBjqWLklwFLKl+h5IXe9BL3Rr+K2LdeIu9rD3nd8xct/jIzCHF1m2X01c8ogsUVQ=="300
TXT"adobe-idp-site-verification=e9a616ab3a85befc4fd088017052624b09d4cc7f81b275648aa05462d05b6342"300
TXT"apple-domain-verification=QKNMmERPSbUMCMbF"300
TXT"atlassian-domain-verification=FQxW3PzVo55wu9MIFDFLrCCsFC9hlZhCdkwAJbJEqoca2vjUlxtMYZjPcM5NsZpX"300
TXT"docusign=0f537120-9712-499a-903e-21f6028d03b2"300
TXT"fyvdlgyytq2nl3cg1h1b66xlc2wbz7tz"300
TXT"google-gws-recovery-domain-verification=68385605"300
TXT"google-site-verification=1KmdqcXojvwgaaMqY_ExT_gSW4vJeNp0Y0ER19HLF1M"300
TXT"google-site-verification=_8lwSuChpM8DSmvTikGa9ma4XLTXTJ5KxOQ1X1UN0dg"300
TXT"langdock-verify=c3SQ90vMjhQx0fpeC_0sMkvkejHWbSxFfPZnpmPxF7Y"300
TXT"miro-verification=dc90ed96376ec21847de271733e900023e918b44"300
TXT"openai-domain-verification=dv-QINM1sHrHnM37o49nNTYzTYI"300
TXT"v=spf1 mx include:amazonses.com include:inxserver.com include:spf.protection.outlook.com a:portal.iqsuite.com include:_spf.profils.org include:spf.talention.com -all"300
CAA0 issue "comodoca.com"3600
CAA0 issue "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issue "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issue "ssl.com"3600
CAA0 issuewild "comodoca.com"3600
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issuewild "letsencrypt.org"3600
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issuewild "ssl.com"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.