opentable.com

Checked 22 October 2026, 10:10 UTC · via 8.8.8.8
!Passed with warnings
24 passed 4 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2029-01-17

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
17 January 1999
Last changed
25 June 2022
Expires
17 January 2029
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
a1-93.akam.net, a11-66.akam.net, a12-67.akam.net, a13-64.akam.net, a28-65.akam.net
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2029-01-17 #3
    The registration is valid until 2029-01-17 (817 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

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
com
Delegation from
a.gtld-servers.net (192.5.6.30)
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::5dAS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net84.53.139.66 2600:1480:1::42AS20940 AKAMAI-ASN1 - 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 2 addresses; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 8 addresses.
  • 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 / yesrefused41824.5
a1-93.akam.net 2600:1401:2::5dNOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a11-66.akam.net 84.53.139.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.9
a11-66.akam.net 2600:1480:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a12-67.akam.net 184.26.160.67NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a12-67.akam.net 2600:1480:f000::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a13-64.akam.net 2.22.230.64NOERROR, 5 ms, authoritativenoyes / yesrefused41824.6
a13-64.akam.net 2600:1480:800::40NOERROR, 5 ms, authoritativenoyes / yesrefused41824.11
a28-65.akam.net 95.100.173.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a28-65.akam.net 2600:1480:d800::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26

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: "41824.5"; a11-66.akam.net: "41824.9"; a11-66.akam.net: "41824.4"; a12-67.akam.net: "48878.33"; a12-67.akam.net: "48878.26"; a13-64.akam.net: "41824.6"; a13-64.akam.net: "41824.11"; a28-65.akam.net: "48878.27"; a28-65.akam.net: "48878.26". 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

warn

serial 2026102101 · primary a1-93.akam.net

Found

Primary (MNAME)
a1-93.akam.net
Contact (RNAME)
hostmaster.opentable.com
Serial
2026102101
Refresh / retry
1800 s / 900 s
Expire
2700 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
a1-93.akam.net (193.108.91.93)2026102101
a1-93.akam.net (2600:1401:2::5d)2026102101
a11-66.akam.net (84.53.139.66)2026102101
a11-66.akam.net (2600:1480:1::42)2026102101
a12-67.akam.net (184.26.160.67)2026102101
a12-67.akam.net (2600:1480:f000::43)2026102101
a13-64.akam.net (2.22.230.64)2026102101
a13-64.akam.net (2600:1480:800::40)2026102101
a28-65.akam.net (95.100.173.65)2026102101
a28-65.akam.net (2600:1480:d800::41)2026102101

Checks

  • ✓ Serial 2026102101 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    expire 45m is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 45m must be longer than refresh + retry. Current values: refresh 30m, retry 15m, expire 45m, negative TTL 30m.
    #23
  • ✓ 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 2026102101 follows the YYYYMMDDnn convention (2026-10-21).

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

72 records at the apex

Found

Read from
193.108.91.93:53
TypeValueTTL
SOAa1-93.akam.net. hostmaster.opentable.com. 2026102101 1800 900 2700 18003600
NSa13-64.akam.net.3600
NSa1-93.akam.net.3600
NSa28-65.akam.net.3600
NSa11-66.akam.net.3600
NSa12-67.akam.net.3600
A2.16.204.13620
A2.16.204.14320
AAAA2a02:26f0:b700:5::210:cc0a20
AAAA2a02:26f0:b700:5::210:cc1420
MX1 mxb-009e5201.gslb.pphosted.com.3600
MX1 mxa-009e5201.gslb.pphosted.com.3600
TXT"google-site-verification=iAvRbfD-cpCIp9Vh7zu0muXRQ-grOl75SO1IWgVDtm8"3600
TXT"serval-domain-verification-421g77=qekD43QJCX6paxfA0rbP7Rrwh"3600
TXT"mixpanel-domain-verify=a5f6ad0e-137c-4fe5-b060-12a31a0bd648"3600
TXT"stripe-verification=6fc06b28a4dce12135cfc982ee67b4f50ecdf24931633f46ed324b939e2d132c"3600
TXT"rca9qu191fdulso9410iu7gpu3"3600
TXT"atlassian-domain-verification=B1e9uqeJyMnx/b8qh19lhS2HmbMwe7iMsn3YJUdW1FrMfjT5ZIZIApoe6mckiqGv"3600
TXT"v=spf1 include:spf-009e5201.pphosted.com include:opentable.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all"3600
TXT"anthropic-domain-verification-db30bc=N1c9CmtgUGIbJT2F0GMtPzZ36"3600
TXT"u3580q5695i4l2qdpje5llo6nm"3600
TXT"sprout-social-22c16660-fc0a-4092-8372-b4feb87dae2c"3600
TXT"stripe-verification=c6ba89f5464c6bfe6ee74b5e0b09d8f67bca1ba9d28ffb7c4d51067344241bbe"3600
TXT"atlassian-sending-domain-verification=eb1394f6-36eb-48b8-add7-bc0f6ff9c27d"3600
TXT"stripe-verification=0541ddd99d259a6b83784688d152e53689b3c7b62ab2a94c1af4881d8c325667"3600
TXT"google-site-verification=PR6bsg2iBjtogm6BDgddEuTgiX-EbOoMqta3rsDtzj0"3600
TXT"docusign=9c016a59-0e5e-4945-bfa7-a3c1ee26c5de"3600
TXT"postman-domain-verification=5cb06118fda0647b37123dd50f6f5bd5294c61dffdef527c424f756ca40bffb70dff1ba80446162841fb2de3ef1a310f0e4a7d0891d061080aa56c6cee850702"3600
TXT"atlassian-domain-verification=BcfvoLviBjhlC6QEDbAiLgN84XchQdviqRvvLSfFAHeBHr3uyp2tKbVVXmBN+eXb"3600
TXT"qtpunbfevd3k9r6jdmtmcgfrf6"3600
TXT"google-site-verification=6D4H6bhuErQdFB3f81oJoDbW3c0jOjZDisxPjC6gC0Y"3600
TXT"9i9eeig7u7gfsn9ct7p0eubeja"3600
TXT"stripe-verification=7ce9b2bea1ac18f9f8081a240f771d3d36e6177de24d42e48b3c8f7fd5b0ba47"3600
TXT"google-site-verification=dWhPInu54_2ivPqF9_jQktzvzBxsjeh9zm929visCDY"3600
TXT"q2bcpo1cq76sho5s3utqj1kmkv"3600
TXT"00d30000000pvcweay"3600
TXT"onetrust-domain-verification=0f9e94eb62524537ba43bf602004e795"3600
TXT"onetrust-domain-verification=ac3129b231a84c67a8c1ec30a55d0fa3"3600
TXT"5f892dd0-1d29-4b30-81c8-863ea4231583"3600
TXT"heroku-domain-verification=3blc2hmkxihxtn0avjlln4pn2plyqabd3m2ycabx4l8"3600
TXT"im696nnbm8bgb0grvjnajhfnqi"3600
TXT"zscaler-verification-170856774-09032026-CQWva5R"3600
TXT"AC6B757620"3600
TXT"bbd19f39dd914c9591841d88d2a11618"3600
TXT"fu79l9k8fp47l8889ulq77qk3t"3600
TXT"apple-domain-verification=TbluTDK1pHEt-bHOdkhUTFAPMuoDfjDv9qB7Oo7Qgz0"3600
TXT"mjpo463p7puejpmh96ingbr5r2"3600
TXT"cf6a0ede100cc84a33ac61ce5c5d4a2b"3600
TXT"hpe-greenlake-domain-verification=7348513033776c3165577a50736550385158586338596a665359644c43773361"3600
TXT"stripe-verification=87f88a3ae169a524f546ed203d0cb22535e7f0e722a5004814cb828d3d1b342f"3600
TXT"zapier-domain-verification-challenge=965182cb-9e01-4340-b833-c5c46d7922d1"3600
TXT"adobe-idp-site-verification=ec528de2ae9538ba906534aa6b1768fe00c3487d898aafaa7082441610a852e1"3600
TXT"google-site-verification=HF7q_NNGnz6d3YVda8T7ZKulRxczYpsgD-56ylmDGMo"3600
TXT"g262epspdc1fl5c0n92b4uju3k"3600
TXT"cursor-domain-verification-9xfkrm=PXebiYtmglAGXDtTboXT4Anxl"3600
TXT"docusign=d4e3ea5f-fd0b-47f1-b45e-da0ad86a47e6"3600
TXT"stripe-verification=a3cd1e5407820ba2f4e9df948ed7871a2303c8488c66b781302677cccd05fde0"3600
TXT"logmein-verification-code=b4fb674b-944c-4dd3-8ef9-bef03a941181"3600
TXT"openai-domain-verification=dv-zHmSxfM8SGf4jVZ2NskHrCZE"3600
TXT"amazonses:51gaUTEuZ6SLHC/RnyDYDMQav3XRqJGxVA8s5sc+QsU="3600
TXT"A61rs42qfdM59WX4SGmzbUjV/GH4k2JyzdmGySiWD80m2nrR9/NtOJRmfzbxe+4HJrS0uPufFCsJNmY03gSqEQ=="3600
TXT"paloaltonetworks-site-verification=aaf6c3e5145443eba5d53ab7735555b5f12354754d6c18b796c21759b2e551ed"3600
TXT"stripe-verification=36a8ae673d2824b08508d33f51fbd183a78e598178cf455b3941b48b1ed1848c"3600
TXT"MS=ms18891622"3600
TXT"google-site-verification=TsZuQw9sNqTXh-GyamMTwOvv6OoUjuM3GXDyPu9QKRI"3600
TXT"sonnqg359uai8r0ohvft7p3kg5"3600
TXT"security@siftscience.com"3600
TXT"itdi5moo78106kd0rpibl3u280"3600
TXT"stripe-verification=6bb69f06400ffd81c173e80ece77f9cb903fd23583d37619628834425c8e0335"3600
TXT"a40bbma6r6iumsamrapuol6q6k"3600
TXT"sinch-domain-verification=555a1b9c-1e3e-4de9-8cd3-da207002d277"3600
TXT"google-site-verification=4QrX5pujh4QuMq-v3jZqAT1rHYPb6Z3yB-D3fXdGZII"3600

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 2d 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