ssllabs.com

Checked 22 October 2026, 10:51 UTC · via 8.8.8.8
!Passed with warnings
28 passed 1 warning 0 failed 5 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-01-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
1 January 2009
Last changed
1 December 2025
Expires
1 January 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
seth.ns.cloudflare.com, tara.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 2028-01-01 #3
    The registration is valid until 2028-01-01 (436 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

seth.ns.cloudflare.com, tara.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
seth.ns.cloudflare.com, tara.ns.cloudflare.com
NS in the zone
seth.ns.cloudflare.com, tara.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
seth.ns.cloudflare.com173.245.59.142 172.64.33.142 108.162.193.142 2803:f800:50::6ca2:c18e 2606:4700:58::adf5:3b8e 2a06:98c1:50::ac40:218eAS13335 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., US108.162.193.142 172.64.33.142 173.245.59.142 2606:4700:58::adf5:3b8e 2803:f800:50::6ca2:c18e 2a06:98c1:50::ac40:218e
tara.ns.cloudflare.com173.245.58.225 108.162.192.225 172.64.32.225 2803:f800:50::6ca2:c0e1 2a06:98c1:50::ac40:20e1 2606:4700:50::adf5:3ae1AS13335 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., US108.162.192.225 172.64.32.225 173.245.58.225 2606:4700:50::adf5:3ae1 2803:f800:50::6ca2:c0e1 2a06:98c1:50::ac40:20e1

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: seth.ns.cloudflare.com, tara.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
seth.ns.cloudflare.com 173.245.59.142NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
seth.ns.cloudflare.com 172.64.33.142NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
seth.ns.cloudflare.com 108.162.193.142NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
seth.ns.cloudflare.com 2803:f800:50::6ca2:c18eNOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
seth.ns.cloudflare.com 2606:4700:58::adf5:3b8eNOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
seth.ns.cloudflare.com 2a06:98c1:50::ac40:218eNOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
tara.ns.cloudflare.com 173.245.58.225NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
tara.ns.cloudflare.com 108.162.192.225NOERROR, 7 ms, authoritativenoyes / yesrefused2026.10.2
tara.ns.cloudflare.com 172.64.32.225NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
tara.ns.cloudflare.com 2803:f800:50::6ca2:c0e1NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
tara.ns.cloudflare.com 2a06:98c1:50::ac40:20e1NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
tara.ns.cloudflare.com 2606:4700:50::adf5:3ae1NOERROR, 4 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: seth.ns.cloudflare.com: "2026.10.2"; tara.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 2417426591 · primary seth.ns.cloudflare.com

Found

Primary (MNAME)
seth.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417426591
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
seth.ns.cloudflare.com (173.245.59.142)2417426591
seth.ns.cloudflare.com (172.64.33.142)2417426591
seth.ns.cloudflare.com (108.162.193.142)2417426591
seth.ns.cloudflare.com (2803:f800:50::6ca2:c18e)2417426591
seth.ns.cloudflare.com (2606:4700:58::adf5:3b8e)2417426591
seth.ns.cloudflare.com (2a06:98c1:50::ac40:218e)2417426591
tara.ns.cloudflare.com (173.245.58.225)2417426591
tara.ns.cloudflare.com (108.162.192.225)2417426591
tara.ns.cloudflare.com (172.64.32.225)2417426591
tara.ns.cloudflare.com (2803:f800:50::6ca2:c0e1)2417426591
tara.ns.cloudflare.com (2a06:98c1:50::ac40:20e1)2417426591
tara.ns.cloudflare.com (2606:4700:50::adf5:3ae1)2417426591

Checks

  • ✓ Serial 2417426591 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 seth.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 2417426591 is a Unix timestamp (2046-08-09 11:23 UTC).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Signatures valid until
23 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 049B4E350D3579B5…yes

DNSKEY in the zone

Key tagRoleAlgorithm
2371KSK (257)ECDSAP256SHA256 (13)
34505ZSK (256)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 2371 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 50h0m0s and created on demand; the current one was made at 2026-10-21 09:51 UTC and expires at 2026-10-23 11:51 UTC.

Records

info

24 records at the apex

Found

Read from
173.245.59.142:53
TypeValueTTL
SOAseth.ns.cloudflare.com. dns.cloudflare.com. 2417426591 10000 2400 604800 18001800
NSseth.ns.cloudflare.com.86400
NStara.ns.cloudflare.com.86400
A69.67.183.100300
MX1 ssllabs.com.s10a1.psmtp.com.3600
MX1 ssllabs.com.s10a2.psmtp.com.3600
MX1 ssllabs.com.s10b1.psmtp.com.3600
MX1 ssllabs.com.s10b2.psmtp.com.3600
TXT"_mmd9d3p6bo8e76kei2cv6jfzqeumy0e"300
TXT"_rqj9f3uuue0hoawxxxewujsz3wh7ky0"300
TXT"_zy72o3bsexdkxz5bd572sr9byy64sjx"300
TXT"v=spf1 ip4:64.39.100.69 ~all"300
TXT"z5yzn3x4ypg6n3f02xpwkmrzdvs2m4wn"300
CAA0 iodef "digicert.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

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1h, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.