on3.com

Checked 22 October 2026, 10:05 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 2028-01-05

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
6 January 1996
Last changed
6 January 2026
Expires
5 January 2028
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
rex.ns.cloudflare.com, vivienne.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 2028-01-05 #3
    The registration is valid until 2028-01-05 (439 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

rex.ns.cloudflare.com, vivienne.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
rex.ns.cloudflare.com, vivienne.ns.cloudflare.com
NS in the zone
rex.ns.cloudflare.com, vivienne.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
rex.ns.cloudflare.com108.162.195.13 162.159.44.13 172.64.35.13 2606:4700:58::a29f:2c0d 2803:f800:50::6ca2:c30d 2a06:98c1:50::ac40:230dAS13335 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., US108.162.195.13 162.159.44.13 172.64.35.13 2606:4700:58::a29f:2c0d 2803:f800:50::6ca2:c30d 2a06:98c1:50::ac40:230d
vivienne.ns.cloudflare.com162.159.38.50 108.162.194.50 172.64.34.50 2a06:98c1:50::ac40:2232 2606:4700:50::a29f:2632 2803:f800:50::6ca2:c232AS13335 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., US108.162.194.50 162.159.38.50 172.64.34.50 2606:4700:50::a29f:2632 2803:f800:50::6ca2:c232 2a06:98c1:50::ac40:2232

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: rex.ns.cloudflare.com, vivienne.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
rex.ns.cloudflare.com 108.162.195.13NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
rex.ns.cloudflare.com 162.159.44.13NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
rex.ns.cloudflare.com 172.64.35.13NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
rex.ns.cloudflare.com 2606:4700:58::a29f:2c0dNOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
rex.ns.cloudflare.com 2803:f800:50::6ca2:c30dNOERROR, 7 ms, authoritativenoyes / yesrefused2026.10.2
rex.ns.cloudflare.com 2a06:98c1:50::ac40:230dNOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
vivienne.ns.cloudflare.com 162.159.38.50NOERROR, 33 ms, authoritativenoyes / yesrefused2026.10.2
vivienne.ns.cloudflare.com 108.162.194.50NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
vivienne.ns.cloudflare.com 172.64.34.50NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
vivienne.ns.cloudflare.com 2a06:98c1:50::ac40:2232NOERROR, 9 ms, authoritativenoyes / yesrefused2026.10.2
vivienne.ns.cloudflare.com 2606:4700:50::a29f:2632NOERROR, 10 ms, authoritativenoyes / yesrefused2026.10.2
vivienne.ns.cloudflare.com 2803:f800:50::6ca2:c232NOERROR, 9 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: rex.ns.cloudflare.com: "2026.10.2"; vivienne.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 2417833056 · primary rex.ns.cloudflare.com

Found

Primary (MNAME)
rex.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417833056
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
rex.ns.cloudflare.com (108.162.195.13)2417833056
rex.ns.cloudflare.com (162.159.44.13)2417833056
rex.ns.cloudflare.com (172.64.35.13)2417833056
rex.ns.cloudflare.com (2606:4700:58::a29f:2c0d)2417833056
rex.ns.cloudflare.com (2803:f800:50::6ca2:c30d)2417833056
rex.ns.cloudflare.com (2a06:98c1:50::ac40:230d)2417833056
vivienne.ns.cloudflare.com (162.159.38.50)2417833056
vivienne.ns.cloudflare.com (108.162.194.50)2417833056
vivienne.ns.cloudflare.com (172.64.34.50)2417833056
vivienne.ns.cloudflare.com (2a06:98c1:50::ac40:2232)2417833056
vivienne.ns.cloudflare.com (2606:4700:50::a29f:2632)2417833056
vivienne.ns.cloudflare.com (2803:f800:50::6ca2:c232)2417833056

Checks

  • ✓ Serial 2417833056 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 rex.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 2417833056 is a Unix timestamp (2046-08-14 04:17 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

19 records at the apex

Found

Read from
108.162.195.13:53
TypeValueTTL
SOArex.ns.cloudflare.com. dns.cloudflare.com. 2417833056 10000 2400 604800 18001800
NSrex.ns.cloudflare.com.86400
NSvivienne.ns.cloudflare.com.86400
A172.66.171.47300
A104.20.39.107300
AAAA2606:4700:10::6814:276b300
AAAA2606:4700:10::ac42:ab2f300
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"MS=ms71908880"300
TXT"anthropic-domain-verification-a08cp7=bGKOP2jNQ68A3Z25wSu0tIeVP"300
TXT"google-site-verification=3lkA9cdPIm0UQHDazQcqED3YfVCoVXT3Y2CaW7m2AvE"300
TXT"google-site-verification=jM2sZZneR3LYJkwVWaE4aZvlDj3a0H0llMiQT18Fi50"300
TXT"google-site-verification=tuSQxB92L683zCNGqFhRKRQkihxaY0C6JOXkOhvGKmc"300
TXT"pinterest-site-verification=9cbb2e3b2316d5dec186b0422582f05b"300
TXT"v=spf1 a mx include:_spf.mlsend.com include:amazonses.com include:aspmx.sailthru.com ?all"300

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.
  • 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