opentable.de

Checked 21 October 2026, 23:41 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 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

a1-93.akam.net, a11-66.akam.net, a12-67.akam.net, a13-64.akam.net, a28-65.akam.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
a1-93.akam.net, a11-66.akam.net, a12-67.akam.net, a13-64.akam.net, a28-65.akam.net
NS in the zone
a1-93.akam.net, a11-66.akam.net, a12-67.akam.net, a13-64.akam.net, a28-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-93.akam.net193.108.91.93 2600:1401:2::5dAS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net84.53.139.66 2600:1480:1::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a12-67.akam.net184.26.160.67 2600:1480:f000::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-64.akam.net2.22.230.64 2600:1480:800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a28-65.akam.net95.100.173.65 2600:1480:d800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 5 nameservers #6
    Delegated to a1-93.akam.net, a11-66.akam.net, a12-67.akam.net, a13-64.akam.net, a28-65.akam.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 5 IPv4 /24s and 5 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 10 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

10 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-93.akam.net 193.108.91.93NOERROR, 3 ms, authoritativenoyes / yesrefused41824.9
a1-93.akam.net 2600:1401:2::5dNOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a11-66.akam.net 84.53.139.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.9
a11-66.akam.net 2600:1480:1::42NOERROR, 8 ms, authoritativenoyes / yesrefused41824.8
a12-67.akam.net 184.26.160.67NOERROR, 7 ms, authoritativenoyes / yesrefused48878.26
a12-67.akam.net 2600:1480:f000::43NOERROR, 7 ms, authoritativenoyes / yesrefused48878.33
a13-64.akam.net 2.22.230.64NOERROR, 8 ms, authoritativenoyes / yesrefused41824.11
a13-64.akam.net 2600:1480:800::40NOERROR, 8 ms, authoritativenoyes / yesrefused41824.11
a28-65.akam.net 95.100.173.65NOERROR, 7 ms, authoritativenoyes / yesrefused48878.29
a28-65.akam.net 2600:1480:d800::41NOERROR, 8 ms, authoritativenoyes / yesrefused48878.30

Checks

  • ✓ All respond #14
    All 10 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: a1-93.akam.net: "41824.9"; a1-93.akam.net: "41824.11"; a11-66.akam.net: "41824.9"; a11-66.akam.net: "41824.8"; a12-67.akam.net: "48878.26"; a12-67.akam.net: "48878.33"; a13-64.akam.net: "41824.11"; a28-65.akam.net: "48878.29"; a28-65.akam.net: "48878.30". 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 2026091701 · primary a1-93.akam.net

Found

Primary (MNAME)
a1-93.akam.net
Contact (RNAME)
hostmaster.opentable.com
Serial
2026091701
Refresh / retry
3600 s / 900 s
Expire
3600000 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-93.akam.net (193.108.91.93)2026091701
a1-93.akam.net (2600:1401:2::5d)2026091701
a11-66.akam.net (84.53.139.66)2026091701
a11-66.akam.net (2600:1480:1::42)2026091701
a12-67.akam.net (184.26.160.67)2026091701
a12-67.akam.net (2600:1480:f000::43)2026091701
a13-64.akam.net (2.22.230.64)2026091701
a13-64.akam.net (2600:1480:800::40)2026091701
a28-65.akam.net (95.100.173.65)2026091701
a28-65.akam.net (2600:1480:d800::41)2026091701

Checks

  • ✓ Serial 2026091701 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 15m, expire 1000h, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-93.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@opentable.com #25
    The SOA RNAME hostmaster.opentable.com means hostmaster@opentable.com.
  • ✓ Date-based serial #26
    The serial 2026091701 follows the YYYYMMDDnn convention (2026-09-17).

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

29 records at the apex

Found

Read from
193.108.91.93:53
TypeValueTTL
SOAa1-93.akam.net. hostmaster.opentable.com. 2026091701 3600 900 3600000 300300
NSa12-67.akam.net.300
NSa11-66.akam.net.300
NSa1-93.akam.net.300
NSa28-65.akam.net.300
NSa13-64.akam.net.300
A2.16.204.15320
A2.16.204.14720
AAAA2a02:26f0:b700:5::210:cc1a20
AAAA2a02:26f0:b700:5::210:cc0620
MX1 mxa-009e5201.gslb.pphosted.com.300
MX1 mxb-009e5201.gslb.pphosted.com.300
TXT"apple-domain-verification=GEheBkCMTrHCTgdp2PTCFLdn_clzJH5UqZhU5evEdsk"300
TXT"security@siftscience.com"300
TXT"v=spf1 include:opentable.com ~all"300
TXT"google-site-verification=bmQw0z6xORo9Enq3mIHuyVK6tVJkZOnpmuEMLNxA0iI"300
TXT"9obvmej65133tuiavcbkrnh0jp"300
TXT"MS=ms53881801"300
TXT"bot9di5ve4710omqqhpsbi4hpv"300
TXT"google-site-verification=9iS-Zt_uWi-7h2_DsPGwttyBqj8bTnuHGUO11TAgHeM"300
TXT"q7juoots5vj6i0kk6tgqkac2sf"300
TXT"google-site-verification=OPIhTu0DOUBqTNW48XK947qeYNFAF1YP9zfJx9novB0"300
TXT"google-site-verification=4NW1Nrjd_8TMdmqPbiDWto9bn-9PhTp_42FqZn7taDo"300
TXT"hxdwxkgg8w6ysdx8nv24h1tk48r3lstv"300
TXT"7dvwwhbsgj6gd7l6zwjw7dtgc5n9hg0b"300
TXT"google-site-verification=44n5VCSQiUEOk0CChHAx5kj7cdqLYux4wraHHnR_jgk"300
TXT"ydznhvtsk1pw0tfwy7kdbndkrtxnqmtj"300
TXT"dc63tbky93zvt3ch257q9tsmtx165nqn"300
TXT"3007p2v0qbh4jw7qkth9b9g31srn7fr4"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 5m; 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