hotelbb.de

Checked 21 October 2026, 22:50 UTC · via 8.8.8.8
!Passed with warnings
20 passed 4 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

warn

ns1.hotelbb.com, ns2.hotelbb.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.hotelbb.com, ns2.hotelbb.com
NS in the zone
ns1.hotelbb.com, ns2.hotelbb.com
NameserverAddressesNetwork (AS)Glue
ns1.hotelbb.com217.147.202.131AS20529 AS1_ALFA-SAFETY - Alfa-Safety SARL, FR-
ns2.hotelbb.com13.39.138.117AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.hotelbb.com, ns2.hotelbb.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 2 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16509 (AMAZON-02 - Amazon.com, Inc., US): 1 address; AS20529 (AS1_ALFA-SAFETY - Alfa-Safety SARL, FR): 1 address.
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.hotelbb.com 217.147.202.131NOERROR, 16 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)
ns2.hotelbb.com 13.39.138.117NOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)

Checks

  • ✓ All respond #14
    All 2 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.hotelbb.com: "PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)"; ns2.hotelbb.com: "PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)". 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 2026100902 · primary ns1.hotelbb.com

Found

Primary (MNAME)
ns1.hotelbb.com
Contact (RNAME)
hostmaster.hotelbb.de
Serial
2026100902
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.hotelbb.com (217.147.202.131)2026100902
ns2.hotelbb.com (13.39.138.117)2026100902

Checks

  • ✓ Serial 2026100902 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.hotelbb.com is one of the listed nameservers.
  • ✓ Contact hostmaster@hotelbb.de #25
    The SOA RNAME hostmaster.hotelbb.de means hostmaster@hotelbb.de.
  • ✓ Date-based serial #26
    The serial 2026100902 follows the YYYYMMDDnn convention (2026-10-09).

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

warn

23 records at the apex

Found

Read from
217.147.202.131:53
TypeValueTTL
SOAns1.hotelbb.com. hostmaster.hotelbb.de. 2026100902 10800 3600 604800 36003600
NSns2.hotelbb.com.3600
NSns1.hotelbb.com.3600
A18.193.53.12435
A35.157.224.3435
A3.71.161.13535
MX10 smtp1.hotelbb.com.3600
MX5 ALT1.ASPMX.L.GOOGLE.com.3600
MX1 ASPMX.L.GOOGLE.com.3600
MX5 ALT2.ASPMX.L.GOOGLE.com.3600
MX10 ALT3.ASPMX.L.GOOGLE.com.3600
MX10 ALT4.ASPMX.L.GOOGLE.com.3600
MX10 smtp2.hotelbb.com.3600
TXT"atlassian-domain-verification=e3NXNoK0UBhMKhQC/BNZ3gPejWHCna43dlTZwxW0i4+U/m4L2xH4V6p80JUkMasW"300
TXT"9199c3fd47e0b63de25d31489364c32ae771751cb37d93050807437a1d0df91e"300
TXT"MS=ms66957000"300
TXT"d3f49b1ccc161263143521a7f134663121696bde4f60551d7d820ade065e583"300
TXT"apple-domain-verification=6FKpAyUt1Iy4hlmQ"300
TXT"7caf00054d94dd544f2223e299c59ed1e4bfbb1909119029eb84da22ca6e807"300
TXT"v=spf1 mx ip4:176.9.207.110 ip4:176.9.173.59 ~all"300
TXT"google-site-verification=ryefufM3X-bcDTo3445-3XJZUrh0U9D5uxr529Qu1zQ"300
TXT"MS=ms86927860"300
TXT"c0b807b8532399f57b9cb0afe1fb1819ede3084bb5548210fe1b37840ea779f"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (35s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 1h; resolvers may use either.
    #32
  • ✓ 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