kubiobuilder.com

Checked 22 October 2026, 09:33 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · GoDaddy.com, LLC · expires 2027-10-20

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
20 October 2021
Last changed
21 October 2026
Expires
20 October 2027
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
oswald.ns.cloudflare.com, tori.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 2027-10-20 #3
    The registration is valid until 2027-10-20 (362 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client renew 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

oswald.ns.cloudflare.com, tori.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
oswald.ns.cloudflare.com, tori.ns.cloudflare.com
NS in the zone
oswald.ns.cloudflare.com, tori.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
oswald.ns.cloudflare.com172.64.33.218 108.162.193.218 173.245.59.218 2803:f800:50::6ca2:c1da 2606:4700:58::adf5:3bda 2a06:98c1:50::ac40:21daAS13335 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., US108.162.193.218 172.64.33.218 173.245.59.218 2606:4700:58::adf5:3bda 2803:f800:50::6ca2:c1da 2a06:98c1:50::ac40:21da
tori.ns.cloudflare.com108.162.192.231 172.64.32.231 173.245.58.231 2606:4700:50::adf5:3ae7 2803:f800:50::6ca2:c0e7 2a06:98c1:50::ac40:20e7AS13335 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., US108.162.192.231 172.64.32.231 173.245.58.231 2606:4700:50::adf5:3ae7 2803:f800:50::6ca2:c0e7 2a06:98c1:50::ac40:20e7

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: oswald.ns.cloudflare.com, tori.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
oswald.ns.cloudflare.com 172.64.33.218NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
oswald.ns.cloudflare.com 108.162.193.218NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
oswald.ns.cloudflare.com 173.245.59.218NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
oswald.ns.cloudflare.com 2803:f800:50::6ca2:c1daNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
oswald.ns.cloudflare.com 2606:4700:58::adf5:3bdaNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
oswald.ns.cloudflare.com 2a06:98c1:50::ac40:21daNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tori.ns.cloudflare.com 108.162.192.231NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tori.ns.cloudflare.com 172.64.32.231NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
tori.ns.cloudflare.com 173.245.58.231NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
tori.ns.cloudflare.com 2606:4700:50::adf5:3ae7NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
tori.ns.cloudflare.com 2803:f800:50::6ca2:c0e7NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
tori.ns.cloudflare.com 2a06:98c1:50::ac40:20e7NOERROR, 15 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: oswald.ns.cloudflare.com: "2026.10.2"; tori.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 2417414682 · primary oswald.ns.cloudflare.com

Found

Primary (MNAME)
oswald.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417414682
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
oswald.ns.cloudflare.com (172.64.33.218)2417414682
oswald.ns.cloudflare.com (108.162.193.218)2417414682
oswald.ns.cloudflare.com (173.245.59.218)2417414682
oswald.ns.cloudflare.com (2803:f800:50::6ca2:c1da)2417414682
oswald.ns.cloudflare.com (2606:4700:58::adf5:3bda)2417414682
oswald.ns.cloudflare.com (2a06:98c1:50::ac40:21da)2417414682
tori.ns.cloudflare.com (108.162.192.231)2417414682
tori.ns.cloudflare.com (172.64.32.231)2417414682
tori.ns.cloudflare.com (173.245.58.231)2417414682
tori.ns.cloudflare.com (2606:4700:50::adf5:3ae7)2417414682
tori.ns.cloudflare.com (2803:f800:50::6ca2:c0e7)2417414682
tori.ns.cloudflare.com (2a06:98c1:50::ac40:20e7)2417414682

Checks

  • ✓ Serial 2417414682 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 oswald.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 2417414682 is a Unix timestamp (2046-08-09 08:04 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

info

30 records at the apex

Found

Read from
172.64.33.218:53
TypeValueTTL
SOAoswald.ns.cloudflare.com. dns.cloudflare.com. 2417414682 10000 2400 604800 18001800
NSoswald.ns.cloudflare.com.86400
NStori.ns.cloudflare.com.86400
A172.67.73.215300
A104.26.3.119300
A104.26.2.119300
AAAA2606:4700:20::681a:277300
AAAA2606:4700:20::681a:377300
AAAA2606:4700:20::ac43:49d7300
MX1 aspmx.l.google.com.3600
MX10 alt3.aspmx.l.google.com.3600
MX10 alt4.aspmx.l.google.com.3600
MX5 alt1.aspmx.l.google.com.3600
MX5 alt2.aspmx.l.google.com.3600
TXT"Sendinblue-code:e783ae00f25ec397764a7e95c530e7b1"300
TXT"brevo-code:c339fd6fc80e8597bc905997a6f530f2"300
TXT"facebook-domain-verification=4bf46f82qt4pr2uutn9dbrw80fy3mx"300
TXT"google-site-verification=7BMR7ts9HktSfkw2MFNLYT4Bw_MIhOnH1Pqu5esT2VQ"300
TXT"google-site-verification=cAL3HlkMH0sLuOXE8zWKY-lLR2bGGDLTpaTEJ3Nu-BY"300
TXT"v=spf1 include:_spf.google.com include:spf.sendinblue.com include:helpscoutemail.com mx -all"300
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 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.