ihs.com

Checked 22 October 2026, 09:15 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-04-18

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
17 April 1992
Last changed
14 April 2026
Expires
18 April 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a1-28.akam.net, a10-65.akam.net, a13-66.akam.net, a14-67.akam.net, a6-64.akam.net, a9-65.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 2027-04-18 #3
    The registration is valid until 2027-04-18 (177 days).
  • ✓ Transfer locked #4
    Registry status: client transfer 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

info

a1-28.akam.net, a10-65.akam.net, a13-66.akam.net, a14-67.akam.net, a6-64.akam.net, a9-65.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-28.akam.net, a10-65.akam.net, a13-66.akam.net, a14-67.akam.net, a6-64.akam.net, a9-65.akam.net
NS in the zone
a1-28.akam.net, a10-65.akam.net, a13-66.akam.net, a14-67.akam.net, a6-64.akam.net, a9-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-28.akam.net193.108.91.28 2600:1401:2::1cAS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a10-65.akam.net96.7.50.65 2600:1480:d000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-66.akam.net2.22.230.66 2600:1480:800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a14-67.akam.net184.26.161.67 2600:1480:1800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a6-64.akam.net23.211.133.64 2600:1401:1::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a9-65.akam.net184.85.248.65 2a02:26f0:117::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-28.akam.net, a10-65.akam.net, a13-66.akam.net, a14-67.akam.net, a6-64.akam.net, a9-65.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 6 IPv4 /24s and 6 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): 12 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

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-28.akam.net 193.108.91.28NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a1-28.akam.net 2600:1401:2::1cNOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
a10-65.akam.net 96.7.50.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.33
a10-65.akam.net 2600:1480:d000::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a13-66.akam.net 2.22.230.66NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8
a13-66.akam.net 2600:1480:800::42NOERROR, 5 ms, authoritativenoyes / yesrefused41824.10
a14-67.akam.net 184.26.161.67NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a14-67.akam.net 2600:1480:1800::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a6-64.akam.net 23.211.133.64NOERROR, 3 ms, authoritativenoyes / yesrefused48878.33
a6-64.akam.net 2600:1401:1::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a9-65.akam.net 184.85.248.65NOERROR, 3 ms, authoritativenoyes / yesrefused41824.8
a9-65.akam.net 2a02:26f0:117::41NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5

Checks

  • ✓ All respond #14
    All 12 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: a1-28.akam.net: "41824.5"; a1-28.akam.net: "41824.6"; a10-65.akam.net: "48878.33"; a10-65.akam.net: "48878.30"; a13-66.akam.net: "41824.8"; a13-66.akam.net: "41824.10"; a14-67.akam.net: "48878.30"; a14-67.akam.net: "48878.33"; a6-64.akam.net: "48878.33"; a6-64.akam.net: "48878.31"; a9-65.akam.net: "41824.8"; a9-65.akam.net: "41824.5". 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

info

serial 2019113461 · primary ns1.ihsmarkit.com

Found

Primary (MNAME)
ns1.ihsmarkit.com
Contact (RNAME)
hostmaster.ihsmarkit.com
Serial
2019113461
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-28.akam.net (193.108.91.28)2019113461
a1-28.akam.net (2600:1401:2::1c)2019113461
a10-65.akam.net (96.7.50.65)2019113461
a10-65.akam.net (2600:1480:d000::41)2019113461
a13-66.akam.net (2.22.230.66)2019113461
a13-66.akam.net (2600:1480:800::42)2019113461
a14-67.akam.net (184.26.161.67)2019113461
a14-67.akam.net (2600:1480:1800::43)2019113461
a6-64.akam.net (23.211.133.64)2019113461
a6-64.akam.net (2600:1401:1::40)2019113461
a9-65.akam.net (184.85.248.65)2019113461
a9-65.akam.net (2a02:26f0:117::41)2019113461

Checks

  • ✓ Serial 2019113461 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 5m.
  • i
    Hidden master
    The primary nameserver ns1.ihsmarkit.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact hostmaster@ihsmarkit.com #25
    The SOA RNAME hostmaster.ihsmarkit.com means hostmaster@ihsmarkit.com.
  • ✓ Timestamp serial #26
    The serial 2019113461 is a Unix timestamp (2033-12-25 08:51 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

25 records at the apex

Found

Read from
193.108.91.28:53
TypeValueTTL
SOAns1.ihsmarkit.com. hostmaster.ihsmarkit.com. 2019113461 10800 3600 2419200 300300
NSa6-64.akam.net.300
NSa13-66.akam.net.300
NSa9-65.akam.net.300
NSa1-28.akam.net.300
NSa14-67.akam.net.300
NSa10-65.akam.net.300
A2.16.204.8620
A2.16.204.9120
AAAA2a02:26f0:b700:4::210:cc5620
AAAA2a02:26f0:b700:4::210:cc5b20
MX10 mxb-0032c001.gslb.pphosted.com.120
MX10 mxa-0032c001.gslb.pphosted.com.120
TXT"v=spf1 ip4:148.163.148.100 ip4:148.163.152.37 ip4:64.78.151.128/26 ip4:216.241.183.0/24 ip4:170.207.0.0/16 include:_spfihsm1.ihsmarkit.com include:_spfihsm2.ihsmarkit.com a:amazonses.com include:mail.ihsmarkit.com ~all"300
TXT"_k4d2xkyu6anm8zo6gv9o08q4d5tg0zg"300
TXT"MS=ms48114224"300
TXT"google-site-verification=GHGX40TXkP4p68TwzrjVNj-l9175ikF8WnhOX_aZlmA"300
TXT"_ip94f0ja4vzcv7rey6bsy51kar0j9h1"300
TXT"MS=ms52110447"300
TXT"_bui615mlymn7e44jsl1lsvq95s9p2ir"300
TXT"3p+zB1VjYTaVtJ+U7EcnLSLgKvZkO0Ema/CdUZT+xnLK1dPUZtitV4Oxv6jB/LsSTKa1dJTvOZzkx+uYSKYLpQ=="300
TXT"ZOOM_verify_dqjjPfWSIaofGZHJyIYhsc"300
TXT"_yd6eyxn19nbz8m6h0eqn8forl00jlvs"300
TXT"_f6nf1u24njf3kyxvx4clp94w709sm9j"300
TXT"smartsheet-site-validation=fp2AdJWbw7PPUowORxGBfDS0uUV7q5id"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s), MX (2m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d 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