buhl.de

Checked 21 October 2026, 22:00 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

ns2.buhl-data.com, pns.dtag.de, secondary006.dtag.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns2.buhl-data.com, pns.dtag.de, secondary006.dtag.net
NS in the zone
ns2.buhl-data.com, pns.dtag.de, secondary006.dtag.net
NameserverAddressesNetwork (AS)Glue
ns2.buhl-data.com62.159.27.2AS3320 DTAG - Deutsche Telekom AG, DE-
pns.dtag.de194.25.0.125 2003:40:8000::100AS3320 DTAG - Deutsche Telekom AG, DE AS3320 DTAG - Deutsche Telekom AG, DE194.25.0.125 2003:40:8000::100
secondary006.dtag.net195.244.245.25 2a00:fa8:3:0:100:0:6:1AS5605 NETUSE - NetUSE AG, DE AS5605 NETUSE - NetUSE AG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns2.buhl-data.com, pns.dtag.de, secondary006.dtag.net.
  • ✓ 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 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3320 (DTAG - Deutsche Telekom AG, DE): 3 addresses; AS5605 (NETUSE - NetUSE AG, DE): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .com, .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns2.buhl-data.com.
    #13

Nameservers

info

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns2.buhl-data.com 62.159.27.2NOERROR, 24 ms, authoritativenoyes / yesrefusedMicrosoft DNS Services
pns.dtag.de 194.25.0.125NOERROR, 9 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 8 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary006.dtag.net 195.244.245.25NOERROR, 13 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary006.dtag.net 2a00:fa8:3:0:100:0:6:1NOERROR, 17 ms, authoritativenoyes / yesrefusedDomainNameServer

Checks

  • ✓ All respond #14
    All 5 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: ns2.buhl-data.com: "Microsoft DNS Services"; pns.dtag.de: "DomainNameServer"; secondary006.dtag.net: "DomainNameServer".
    #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 2011780419 · primary ns2.buhl-data.com

Found

Primary (MNAME)
ns2.buhl-data.com
Contact (RNAME)
hostmaster.buhl-data.com
Serial
2011780419
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
172800 s

Serial per nameserver

NameserverSerial
ns2.buhl-data.com (62.159.27.2)2011780419
pns.dtag.de (194.25.0.125)2011780419
pns.dtag.de (2003:40:8000::100)2011780419
secondary006.dtag.net (195.244.245.25)2011780419
secondary006.dtag.net (2a00:fa8:3:0:100:0:6:1)2011780419

Checks

  • ✓ Serial 2011780419 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 12h, retry 2h, expire 14d, negative TTL 2d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns2.buhl-data.com is one of the listed nameservers.
  • ✓ Contact hostmaster@buhl-data.com #25
    The SOA RNAME hostmaster.buhl-data.com means hostmaster@buhl-data.com.
  • ✓ Timestamp serial #26
    The serial 2011780419 is a Unix timestamp (2033-10-01 11:53 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

info

43 records at the apex

Found

Read from
62.159.27.2:53
TypeValueTTL
SOAns2.buhl-data.com. hostmaster.buhl-data.com. 2011780419 43200 7200 1209600 172800172800
NSns2.buhl-data.com.172800
NSpns.dtag.de.172800
NSsecondary006.dtag.net.172800
A62.159.27.16172800
MX100 mailto.buhl-data.com.172800
TXT"pinterest-site-verification=648916f9fa7f5fbf966b977f6b88e930"172800
TXT"windsurf-verification=-57AMeKG89JXYoEkESe5nit04koaZvOUzXbzDcFMUKk="172800
TXT"google-site-verification=v-WkjFy1Hh6gS-SOJ769yi79dykGmy3mSTnaFRRwoeg"172800
TXT"miro-verification=a1b003909d33b2e45bc288d43b18eaaa121cb404"172800
TXT"brevo-code:31af5417fad891872976a4906817b358"172800
TXT"atlassian-sending-domain-verification=3b7fb3a8-8004-4ed7-894e-851d347bfd65"172800
TXT"docker-verification=7ba71cef-169a-47c3-940a-4771fa076c4e"172800
TXT"figma-domain-verification=a0adc4ebf6313dfa6e4edab54ccf37476676d4b3b8b580800e38dbc912747255-1745926028"172800
TXT"google-site-verification=m5lQL_ubtUP2asvsi_doD-zZGtCUsnhCmRzSnM-m0P0"172800
TXT"D-TRUST=BW9NDWEL6RSW6Q55A4KNZIK"172800
TXT"D-TRUST=SV8PVUBY6VANGS8CGJ9KAPS"172800
TXT"brevo-code:868a57d36b53f54f94ddae5aac42a3e4"172800
TXT"anthropic-domain-verification-dp6jph=szR8Qn2cUJLThzAE6oUngb9kO"172800
TXT"bw=6GOvCnOtCpswauFj8pzv5rHwRp6aOnnYpGjdbn8jtatQ"172800
TXT"openai-domain-verification=dv-PuFisfuysrORvyNDLdWXX8h9"172800
TXT"MS=ms21124824"172800
TXT"jetbrains-domain-verification=diu9trlja5wvhsx1mhxrkcr6o"172800
TXT"apple-domain-verification=dEsbYbzPKUnmeBPF"172800
TXT"google-site-verification=f8yV4UIeHos5SKNcqOhx4LZkzB75L-1Yig0xITL0t_Q"172800
TXT"docker-verification=d7915735-a9fd-4369-bf53-b344349e6a84"172800
TXT"figma-domain-verification=17d39ab593bdc10da8a3a7736a0ead8722d1aa41d81eb12b37f444c094ef00a7-1738849915"172800
TXT"f5pcbvyb4858c8q5h5s7sj74x6lrn481"172800
TXT"rovag_verification_token=E7EBE6AE06A34A809738D4F062914F60"172800
TXT"facebook-domain-verification=yk9jgw0tg4irv3zcw81mwz91o8r33z"172800
TXT"v=spf1 include:spf.buhl.de include:spf.protection.outlook.com -all"172800
TXT"pendo-domain-verification=89982537-1681-4a52-a1d5-c342029ca1d7"172800
TXT"D-TRUST=EGDTE29KC7YJGD67UCEWSWY"172800
TXT"google-site-verification=3-lhGgbeM5kkFJvbsMEb5EV8oY7fEqq5OO3hi-yzfkU"172800
TXT"stripe-verification=654B4B4337ABBB91243EFD8234F6D6E9227F2E6B35DB7C48D6ED6DCF5A7D57C2"172800
TXT"openai-domain-verification=dv-8A917axU1kiQhYjoHfp0kPVL"172800
TXT"google-site-verification=Lz0fsssy6y1hcuoYuRMkhWit_u1ejoAfPolWTbwk58k"172800
TXT"google-site-verification=bMqn9jUn9Vtd_vMnBBi7x3EKo2nRj1nqijR3kXGTJek"172800
TXT"google-site-verification=tcg_4wAw2ZnqGWc0n1XETdgU56zz7c47vWQzSQDpf0Q"172800
TXT"brevo-code:1ddcc846eea4beca8530c151f9e8d5f4"172800
TXT"D-TRUST=PBIF8MC6QPIE4S3ODGA6HSQ"172800
TXT"IZUcPv7IVQz3WIRWlXdYwowuH2272d2UZ5KHn8oYfJ3lF+bnjB2Vpm1HCF/dUUYZ/heMUgGk4OPLvBUbERijyg=="172800
TXT"lgl7cxx72zsppk5hxy38tfzj47rmg1gk"172800

Checks

  • ✓ TTLs within range #32
    TTLs: A 2d, MX 2d, NS 2d. The NS TTL at the parent is 1d and in the zone 2d; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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