itsfoss.com

Checked 22 October 2026, 09:22 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · Cloudflare, Inc. · expires 2028-06-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Cloudflare, Inc.
Registered
9 June 2012
Last changed
16 May 2023
Expires
9 June 2028
Status
client transfer prohibited
Registry nameservers
alex.ns.cloudflare.com, kara.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 2028-06-09 #3
    The registration is valid until 2028-06-09 (596 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

alex.ns.cloudflare.com, kara.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
alex.ns.cloudflare.com, kara.ns.cloudflare.com
NS in the zone
alex.ns.cloudflare.com, kara.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
alex.ns.cloudflare.com172.64.33.100 108.162.193.100 173.245.59.100 2606:4700:58::adf5:3b64 2803:f800:50::6ca2:c164 2a06:98c1:50::ac40:2164- AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.193.100 172.64.33.100 173.245.59.100 2606:4700:58::adf5:3b64 2803:f800:50::6ca2:c164 2a06:98c1:50::ac40:2164
kara.ns.cloudflare.com172.64.32.123 108.162.192.123 173.245.58.123 2a06:98c1:50::ac40:207b 2803:f800:50::6ca2:c07b 2606:4700:50::adf5:3a7bAS13335 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., US108.162.192.123 172.64.32.123 173.245.58.123 2606:4700:50::adf5:3a7b 2803:f800:50::6ca2:c07b 2a06:98c1:50::ac40:207b

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: alex.ns.cloudflare.com, kara.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): 11 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
alex.ns.cloudflare.com 172.64.33.100NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
alex.ns.cloudflare.com 108.162.193.100NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
alex.ns.cloudflare.com 173.245.59.100NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
alex.ns.cloudflare.com 2606:4700:58::adf5:3b64NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
alex.ns.cloudflare.com 2803:f800:50::6ca2:c164NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
alex.ns.cloudflare.com 2a06:98c1:50::ac40:2164NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 172.64.32.123NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 108.162.192.123NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 173.245.58.123NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 2a06:98c1:50::ac40:207bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 2803:f800:50::6ca2:c07bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 2606:4700:50::adf5:3a7bNOERROR, 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: alex.ns.cloudflare.com: "2026.10.2"; kara.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 2417143834 · primary alex.ns.cloudflare.com

Found

Primary (MNAME)
alex.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417143834
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
alex.ns.cloudflare.com (172.64.33.100)2417143834
alex.ns.cloudflare.com (108.162.193.100)2417143834
alex.ns.cloudflare.com (173.245.59.100)2417143834
alex.ns.cloudflare.com (2606:4700:58::adf5:3b64)2417143834
alex.ns.cloudflare.com (2803:f800:50::6ca2:c164)2417143834
alex.ns.cloudflare.com (2a06:98c1:50::ac40:2164)2417143834
kara.ns.cloudflare.com (172.64.32.123)2417143834
kara.ns.cloudflare.com (108.162.192.123)2417143834
kara.ns.cloudflare.com (173.245.58.123)2417143834
kara.ns.cloudflare.com (2a06:98c1:50::ac40:207b)2417143834
kara.ns.cloudflare.com (2803:f800:50::6ca2:c07b)2417143834
kara.ns.cloudflare.com (2606:4700:50::adf5:3a7b)2417143834

Checks

  • ✓ Serial 2417143834 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 alex.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 2417143834 is a Unix timestamp (2046-08-06 04:50 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

pass

24 records at the apex

Found

Read from
172.64.33.100:53
TypeValueTTL
SOAalex.ns.cloudflare.com. dns.cloudflare.com. 2417143834 10000 2400 604800 18001800
NSalex.ns.cloudflare.com.86400
NSkara.ns.cloudflare.com.86400
A172.66.161.39300
A104.20.31.167300
AAAA2606:4700:10::ac42:a127300
AAAA2606:4700:10::6814:1fa7300
MX10 mail.protonmail.ch.300
MX20 mailsec.protonmail.ch.300
TXT"brevo-code:bad6e935b8b8b686b28c8c2969d70aeb"120
TXT"facebook-domain-verification=m676ccg6ag2qgrt6knrzw7c9c9fl1k"120
TXT"google-site-verification=1gCuweVjKngXvzjOhMic8VeJ4iQlhLnb7TAj6wdPg8M"120
TXT"protonmail-verification=427bffb50b5dd01d5dbbc0f4e57d187b3da317d7"120
TXT"v=spf1 include:_spf.protonmail.ch a mx include:_spf.mlsend.com ?all"120
CAA0 issue "comodoca.com"3600
CAA0 issue "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issue "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issue "ssl.com"3600
CAA0 issuewild "comodoca.com"3600
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issuewild "letsencrypt.org"3600
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issuewild "ssl.com"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, 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.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.