zemanta.com

Checked 22 October 2026, 11:42 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 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
3 May 2007
Last changed
19 December 2025
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
ian.ns.cloudflare.com, ivy.ns.cloudflare.com
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

info

ian.ns.cloudflare.com, ivy.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ian.ns.cloudflare.com, ivy.ns.cloudflare.com
NS in the zone
ian.ns.cloudflare.com, ivy.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
ian.ns.cloudflare.com108.162.193.118 173.245.59.118 172.64.33.118 2803:f800:50::6ca2:c176 2a06:98c1:50::ac40:2176 2606:4700:58::adf5:3b76AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.193.118 172.64.33.118 173.245.59.118 2606:4700:58::adf5:3b76 2803:f800:50::6ca2:c176 2a06:98c1:50::ac40:2176
ivy.ns.cloudflare.com172.64.32.120 173.245.58.120 108.162.192.120 2803:f800:50::6ca2:c078 2606:4700:50::adf5:3a78 2a06:98c1:50::ac40:2078AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.192.120 172.64.32.120 173.245.58.120 2606:4700:50::adf5:3a78 2803:f800:50::6ca2:c078 2a06:98c1:50::ac40:2078

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ian.ns.cloudflare.com, ivy.ns.cloudflare.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 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 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 .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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ian.ns.cloudflare.com 108.162.193.118NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
ian.ns.cloudflare.com 173.245.59.118NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ian.ns.cloudflare.com 172.64.33.118NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ian.ns.cloudflare.com 2803:f800:50::6ca2:c176NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ian.ns.cloudflare.com 2a06:98c1:50::ac40:2176NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ian.ns.cloudflare.com 2606:4700:58::adf5:3b76NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
ivy.ns.cloudflare.com 172.64.32.120NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
ivy.ns.cloudflare.com 173.245.58.120NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
ivy.ns.cloudflare.com 108.162.192.120NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ivy.ns.cloudflare.com 2803:f800:50::6ca2:c078NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
ivy.ns.cloudflare.com 2606:4700:50::adf5:3a78NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ivy.ns.cloudflare.com 2a06:98c1:50::ac40:2078NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2

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: ian.ns.cloudflare.com: "2026.10.2"; ivy.ns.cloudflare.com: "2026.10.2". 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 2416949213 · primary ian.ns.cloudflare.com

Found

Primary (MNAME)
ian.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2416949213
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
ian.ns.cloudflare.com (108.162.193.118)2416949213
ian.ns.cloudflare.com (173.245.59.118)2416949213
ian.ns.cloudflare.com (172.64.33.118)2416949213
ian.ns.cloudflare.com (2803:f800:50::6ca2:c176)2416949213
ian.ns.cloudflare.com (2a06:98c1:50::ac40:2176)2416949213
ian.ns.cloudflare.com (2606:4700:58::adf5:3b76)2416949213
ivy.ns.cloudflare.com (172.64.32.120)2416949213
ivy.ns.cloudflare.com (173.245.58.120)2416949213
ivy.ns.cloudflare.com (108.162.192.120)2416949213
ivy.ns.cloudflare.com (2803:f800:50::6ca2:c078)2416949213
ivy.ns.cloudflare.com (2606:4700:50::adf5:3a78)2416949213
ivy.ns.cloudflare.com (2a06:98c1:50::ac40:2078)2416949213

Checks

  • ✓ Serial 2416949213 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ian.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2416949213 is a Unix timestamp (2046-08-03 22:46 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

35 records at the apex

Found

Read from
108.162.193.118:53
TypeValueTTL
SOAian.ns.cloudflare.com. dns.cloudflare.com. 2416949213 10000 2400 604800 18001800
NSian.ns.cloudflare.com.86400
NSivy.ns.cloudflare.com.86400
A23.40.2.10920
AAAA2a02:26f0:680:78c::389220
AAAA2a02:26f0:680:785::389220
MX10 alt1.aspmx.l.google.com.300
MX10 alt2.aspmx.l.google.com.300
MX20 aspmx2.googlemail.com.300
MX20 aspmx3.googlemail.com.300
MX20 aspmx4.googlemail.com.300
MX20 aspmx5.googlemail.com.300
MX5 aspmx.l.google.com.300
TXT"198667287-8448313"300
TXT"MS=ms62516944"300
TXT"_tprdnvsft0abn7aglbjkbv0kxvab2v1"300
TXT"google-site-verification=EF6lSUTuDg5vAqCqBm99r1FrHNip5y3UERQ-2RRNOhs"300
TXT"google-site-verification=fyu6P6tT0QefWipol0D_s771Aans2DOai3WaiNJ07N4"300
TXT"google-site-verification=jjnxlxivlJQhxLr5mICVMV51QGMUsNb5YLF3sCgmV4g"300
TXT"google-site-verification=vR_uk7OYIGrzyAOgB-n5bnPBH-X09xqCRY5vnJNkAOg"300
TXT"hR/zqNWYJWPldW6YT/he61d7YsTLoDqudUtuvEVNMf0="300
TXT"v=spf1 include:_spf1.zemanta.com include:_spf.google.com include:spf.tipalti.com include:mailgun.org include:_spf.salesforce.com ~all"300
CAA0 iodef "email:caa@teads.com"300
CAA0 issue "amazon.com"300
CAA0 issue "amazonca.com"300
CAA0 issue "comodoca.com"300
CAA0 issue "digicert.com; cansignhttpexchanges=yes"300
CAA0 issue "letsencrypt.org"300
CAA0 issue "pki.goog; cansignhttpexchanges=yes"300
CAA0 issue "ssl.com"300
CAA0 issuewild "comodoca.com"300
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"300
CAA0 issuewild "letsencrypt.org"300
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"300
CAA0 issuewild "ssl.com"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 1d; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, amazonca.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.