ihg.com

Checked 22 October 2026, 09:15 UTC · via 8.8.8.8
!Passed with warnings
22 passed 5 warnings 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-05-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
4 May 1998
Last changed
1 April 2026
Expires
3 May 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a1-131.akam.net, a16-66.akam.net, a26-67.akam.net, a28-64.akam.net, a5-65.akam.net, a9-66.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 2027-05-03 #3
    The registration is valid until 2027-05-03 (192 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

a1-131.akam.net, a16-66.akam.net, a26-67.akam.net, a28-64.akam.net, a5-65.akam.net, a9-66.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-131.akam.net, a16-66.akam.net, a26-67.akam.net, a28-64.akam.net, a5-65.akam.net, a9-66.akam.net
NS in the zone
a1-131.akam.net, a16-66.akam.net, a26-67.akam.net, a4-64.akam.net, a5-65.akam.net, a9-66.akam.net
NameserverAddressesNetwork (AS)Glue
a1-131.akam.net193.108.91.131 2600:1401:2::83AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a16-66.akam.net23.211.132.66 2600:1406:1b::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-67.akam.net23.74.25.67 2600:1480:b800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a28-64.akam.net (parent only)95.100.173.64 2600:1480:d800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a4-64.akam.net (zone only)72.246.46.64 2600:1480:9000::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-65.akam.net95.100.168.65 2600:1480:b000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a9-66.akam.net184.85.248.66 2a02:26f0:117::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-131.akam.net, a16-66.akam.net, a26-67.akam.net, a28-64.akam.net, a5-65.akam.net, a9-66.akam.net.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: a28-64.akam.net; only in the zone: a4-64.akam.net. a1-131.akam.net, a16-66.akam.net, a26-67.akam.net, a28-64.akam.net, a4-64.akam.net, a5-65.akam.net, a9-66.akam.net report NS a1-131.akam.net a16-66.akam.net a26-67.akam.net a4-64.akam.net a5-65.akam.net a9-66.akam.net.
    #7
  • ✓ 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 7 IPv4 /24s and 7 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): 14 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

14 of 14 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-131.akam.net 193.108.91.131NOERROR, 3 ms, authoritativenoyes / yesrefused41824.9
a1-131.akam.net 2600:1401:2::83NOERROR, 4 ms, authoritativenoyes / yesrefused41824.7
a16-66.akam.net 23.211.132.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a16-66.akam.net 2600:1406:1b::42NOERROR, 3 ms, authoritativenoyes / yesrefused48878.27
a26-67.akam.net 23.74.25.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.29
a26-67.akam.net 2600:1480:b800::43NOERROR, 3 ms, authoritativenoyes / yesrefused48878.30
a28-64.akam.net 95.100.173.64NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a28-64.akam.net 2600:1480:d800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a4-64.akam.net 72.246.46.64NOERROR, 3 ms, authoritativenoyes / yesrefused48878.31
a4-64.akam.net 2600:1480:9000::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a5-65.akam.net 95.100.168.65NOERROR, 3 ms, authoritativenoyes / yesrefused41824.7
a5-65.akam.net 2600:1480:b000::41NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a9-66.akam.net 184.85.248.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.8
a9-66.akam.net 2a02:26f0:117::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8

Checks

  • ✓ All respond #14
    All 14 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: a1-131.akam.net: "41824.9"; a1-131.akam.net: "41824.7"; a16-66.akam.net: "48878.27"; a26-67.akam.net: "48878.29"; a26-67.akam.net: "48878.30"; a28-64.akam.net: "48878.32"; a28-64.akam.net: "48878.31"; a4-64.akam.net: "48878.31"; a4-64.akam.net: "48878.30"; a5-65.akam.net: "41824.7"; a5-65.akam.net: "41824.5"; a9-66.akam.net: "41824.8". 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 2015045338 · primary a1-131.akam.net

Found

Primary (MNAME)
a1-131.akam.net
Contact (RNAME)
hostmaster.akamai.com
Serial
2015045338
Refresh / retry
86400 s / 7200 s
Expire
2419200 s
Negative TTL
172800 s

Serial per nameserver

NameserverSerial
a1-131.akam.net (193.108.91.131)2015045338
a1-131.akam.net (2600:1401:2::83)2015045338
a16-66.akam.net (23.211.132.66)2015045338
a16-66.akam.net (2600:1406:1b::42)2015045338
a26-67.akam.net (23.74.25.67)2015045338
a26-67.akam.net (2600:1480:b800::43)2015045338
a28-64.akam.net (95.100.173.64)2015045338
a28-64.akam.net (2600:1480:d800::40)2015045338
a4-64.akam.net (72.246.46.64)2015045338
a4-64.akam.net (2600:1480:9000::40)2015045338
a5-65.akam.net (95.100.168.65)2015045338
a5-65.akam.net (2600:1480:b000::41)2015045338
a9-66.akam.net (184.85.248.66)2015045338
a9-66.akam.net (2a02:26f0:117::42)2015045338

Checks

  • ✓ Serial 2015045338 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 1d, retry 2h, expire 28d, negative TTL 2d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-131.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@akamai.com #25
    The SOA RNAME hostmaster.akamai.com means hostmaster@akamai.com.
  • ✓ Timestamp serial #26
    The serial 2015045338 is a Unix timestamp (2033-11-08 06:48 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

warn

58 records at the apex

Found

Read from
193.108.91.131:53
TypeValueTTL
SOAa1-131.akam.net. hostmaster.akamai.com. 2015045338 86400 7200 2419200 1728003600
NSa1-131.akam.net.600
NSa4-64.akam.net.600
NSa16-66.akam.net.600
NSa5-65.akam.net.600
NSa26-67.akam.net.600
NSa9-66.akam.net.600
A2.16.204.15320
A2.16.204.15920
AAAA2a02:26f0:b700:5::210:cc1b20
AAAA2a02:26f0:b700:5::210:cc0a20
MX0 mxb-0036c501.gslb.pphosted.com.300
MX0 mxa-0036c501.gslb.pphosted.com.300
TXT"4fdb91c1174d51905488b7623da69b4ff0dd52fa9fbcee329dd6c1434ca824c9"300
TXT"idmelon-domain-verification=hcrwLCCWr8CgalSxQae33SgPNVy8vXtSVaGLig2rr94fdvNY"300
TXT"anthropic-domain-verification-r8379w=MwTDYwK9sVBagdWPM1oJPonIi"300
TXT"paloaltonetworks-site-verification=867f57cb5a9013ae256c91da2d183e57f6562a0b128333830a86d1d0b5741633"300
TXT"bv-domain-verification=45ab5c02e05c9f9fd374b963b5c94de071aa8cdc7585fa44c7b4af6615e7e929"300
TXT"_pingoneemail=c46ef3b3-b808-4bcf-b3e3-8a0358a804f1_521396dd-061c-408e-bb86-8deefe528caa"300
TXT"cisco-ci-domain-verification=13a1e87099e64542b8638edcc8bf8363597c164ca55733dae9f36fe2204a9d70"300
TXT"docusign=81c7e767-e87d-4bd4-b17a-28b2d5815378"300
TXT"adobe-idp-site-verification=10119d90-fd73-4d3b-9829-2e155c2c8c50"300
TXT"atlassian-domain-verification=KXMJ0mvs6ChyP/99oks6cx5S3sn6QkUtKoBidwbprtBVEzKZjEyVbQdCP0kaYn3a"300
TXT"profound-domain-verification-gchqj6=x27xR9OzuqYY5Gx5x67RzrA6U"300
TXT"adobe-idp-site-verification=654d1890e56573968c853e36fc83f231f5baa963aa417365b427a72d88cb3765"300
TXT"openai-domain-verification=dv-KBIObyWIFzdZ69Rjjy8PAfMY"300
TXT"00Dbf000002PrBG=1TBbf0000000Gb4"300
TXT"00DO3000007SNUU=1TBO30000000KtB"300
TXT"atlassian-domain-verification=lpuDENy9ml3760iOA0L9mWIBGxSycNlWjHYeCLd4N8XNs+GFN9u1n8MeuLm7idYU"300
TXT"onetrust-domain-verification=ae321f5b23d246a7a44e0c55d3e3f159"300
TXT"00DhG0000007Rxx=1TBhG00000002rR"300
TXT"airtable-verification=5b60792110a03186aa1146a0dcb54d10"300
TXT"aliyun-site-verification=de208478-2a88-47e3-9afe-b6d5a3a18435"300
TXT"liveramp-site-verification=cCVbfXk7tL2iezdP41I9_A2D1daw2uJKZVZwU0vY2ag"300
TXT"onetrust-domain-verification=84432776cbc1491a8d768919d5774841"300
TXT"amazonses:hgHSMkBvxXpm9XDb4/fez2ma5IuPpC7CSDYOpqiWCzg="300
TXT"docusign=f09029bd-260b-47ed-bb91-ab1ce43342ff"300
TXT"_95cas5x1cqh62ilj0tftsjvdfbnfz02"300
TXT"anthropic-domain-verification-vgctad=S4ohU2VYXaKem4931ChoQXllm"300
TXT"apple-domain-verification=9UlZhGAVvPnC9H0W"300
TXT"00D3i000000uT0G=1TB7y00000002OP"300
TXT"_globalsign-domain-verification=UjWbXF1MGmkYKGMCMxfJzcsSn6XXNhe9ZYjxhY9CZs"300
TXT"smartsheet-site-validation=FmC1y02mUa6SpP-mMJwk18I4MyaWCIJZ"300
TXT"MS=ms41678183"300
TXT"_s3hx46024aqezp7yszku2hj0eix6shm"300
TXT"_pingoneemail=fa45e6e3-5208-4ff3-9506-6fe5725a3b7b_947864d9-934d-4456-80e2-6fd6145bc6a8"300
TXT"docusign=78238a0b-bcea-4fee-b579-7122309e3632"300
TXT"sterlingcheck-domain-verification=38318804f7754de8836311de1cc1e2f7"300
TXT"Dynatrace-site-verification=40f73b86-a5bd-4b6f-a71a-8ecd294fabe4__7fpbkm8d44oknfivgp5temr9rg"300
TXT"_pingoneemail=ecc74604-525e-462d-833b-22b789433d3e_9043c246-a806-4f93-9c2a-7c272ade3741"300
TXT"airtable-verification=857d3b132cbb30d5bc2ca7409052bf8f"300
TXT"SFMC--EnYHLGCCFpbwwCH3b_zASWE5eMV85v1gTEp1WXk"300
TXT"mandrill_verify.6tUcrUAoJEVJVstu5IdqMA"300
TXT"onetrust-domain-verification=53fe4e288982463993225d64aa36b9dd"300
TXT"aliyun-site-verification=36df2019-fa5a-4493-8763-9258d6cfbdfd"300
TXT"sterlingcheck-domain-verification=d0becd31762c4a3ba8e83c7a61b2ac96"300
TXT"v=spf1 include:_spf.ihg.com include:_spf.google.com include:amazonses.com include:spf.protection.outlook.com include:_spf.highradius.com ip4:148.163.135.129 ip4:216.133.255.190 ip4:147.154.153.87 ip4:138.1.67.161 ip4:138.1.65.17 -all"300
TXT"facebook-domain-verification=q7hux9151ykqswfw28jyhh75nj34wn"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 2d and in the zone 10m; 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