vocabulary.com

Checked 22 October 2026, 11:22 UTC · via 8.8.8.8
!Passed with warnings
28 passed 1 warning 0 failed 5 info

Registration

info

.com generic · 101domain GRS Limited · expires 2027-09-17

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
101domain GRS Limited
Registered
18 September 1996
Last changed
19 July 2026
Expires
17 September 2027
Status
client transfer prohibited
Registry nameservers
chuck.ns.cloudflare.com, cora.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 2027-09-17 #3
    The registration is valid until 2027-09-17 (329 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

chuck.ns.cloudflare.com, cora.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
chuck.ns.cloudflare.com, cora.ns.cloudflare.com
NS in the zone
chuck.ns.cloudflare.com, cora.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
chuck.ns.cloudflare.com173.245.59.86 108.162.193.86 172.64.33.86 2a06:98c1:50::ac40:2156 2803:f800:50::6ca2:c156 2606:4700:58::adf5:3b56AS13335 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., US108.162.193.86 172.64.33.86 173.245.59.86 2606:4700:58::adf5:3b56 2803:f800:50::6ca2:c156 2a06:98c1:50::ac40:2156
cora.ns.cloudflare.com108.162.194.195 172.64.34.195 162.159.38.195 2606:4700:50::a29f:26c3 2a06:98c1:50::ac40:22c3 2803:f800:50::6ca2:c2c3AS13335 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., US108.162.194.195 162.159.38.195 172.64.34.195 2606:4700:50::a29f:26c3 2803:f800:50::6ca2:c2c3 2a06:98c1:50::ac40:22c3

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: chuck.ns.cloudflare.com, cora.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
chuck.ns.cloudflare.com 173.245.59.86NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
chuck.ns.cloudflare.com 108.162.193.86NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
chuck.ns.cloudflare.com 172.64.33.86NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
chuck.ns.cloudflare.com 2a06:98c1:50::ac40:2156NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
chuck.ns.cloudflare.com 2803:f800:50::6ca2:c156NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
chuck.ns.cloudflare.com 2606:4700:58::adf5:3b56NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
cora.ns.cloudflare.com 108.162.194.195NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
cora.ns.cloudflare.com 172.64.34.195NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
cora.ns.cloudflare.com 162.159.38.195NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
cora.ns.cloudflare.com 2606:4700:50::a29f:26c3NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
cora.ns.cloudflare.com 2a06:98c1:50::ac40:22c3NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
cora.ns.cloudflare.com 2803:f800:50::6ca2:c2c3NOERROR, 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: chuck.ns.cloudflare.com: "2026.10.2"; cora.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 2417329063 · primary chuck.ns.cloudflare.com

Found

Primary (MNAME)
chuck.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417329063
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
chuck.ns.cloudflare.com (173.245.59.86)2417329063
chuck.ns.cloudflare.com (108.162.193.86)2417329063
chuck.ns.cloudflare.com (172.64.33.86)2417329063
chuck.ns.cloudflare.com (2a06:98c1:50::ac40:2156)2417329063
chuck.ns.cloudflare.com (2803:f800:50::6ca2:c156)2417329063
chuck.ns.cloudflare.com (2606:4700:58::adf5:3b56)2417329063
cora.ns.cloudflare.com (108.162.194.195)2417329063
cora.ns.cloudflare.com (172.64.34.195)2417329063
cora.ns.cloudflare.com (162.159.38.195)2417329063
cora.ns.cloudflare.com (2606:4700:50::a29f:26c3)2417329063
cora.ns.cloudflare.com (2a06:98c1:50::ac40:22c3)2417329063
cora.ns.cloudflare.com (2803:f800:50::6ca2:c2c3)2417329063

Checks

  • ✓ Serial 2417329063 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 chuck.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 2417329063 is a Unix timestamp (2046-08-08 08:17 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 A97EA79E7D132951…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 10:22 UTC and expires at 2026-10-23 12:22 UTC.

Records

info

31 records at the apex

Found

Read from
173.245.59.86:53
TypeValueTTL
SOAchuck.ns.cloudflare.com. dns.cloudflare.com. 2417329063 10000 2400 604800 18001800
NSchuck.ns.cloudflare.com.86400
NScora.ns.cloudflare.com.86400
A172.64.147.25300
A104.18.40.231300
AAAA2606:4700:4406::ac40:9319300
AAAA2606:4700:440a::6812:28e7300
MX10 mxa.global.inbound.cf-emailsecurity.net.900
MX20 mxb.global.inbound.cf-emailsecurity.net.900
TXT"MS=ms95483959"300
TXT"ZOOM_verify_2GWN8mD8REWUw07rzqw7iQ"300
TXT"apple-domain-verification=AiE7A1mMhBWYKKG_QNfXse2Gx1jS55vv2Xa1AlauCb4"300
TXT"ca3-dcb65ebb6f6646a0ba77c3e4366c434a"300
TXT"google-site-verification=6If6n5Hgvo0IRFxpmqOWrr0rEmtTyJQQ_1UIMhp9jy0"300
TXT"google-site-verification=SeTFrZRrDnl8BPLvbH9Wf6KaYv6AxUWOMXwP_10NWAw"300
TXT"google-site-verification=bqqiNjkwoU5lU0h9UMyIYjxjwLClsGQZwMwVDMs2OfY"300
TXT"google-site-verification=scSUnpy_6b1Dzy9u_FYykTkzTtXnY8kyQkhaVb7l7OA"300
TXT"google-site-verification=y5mf0F_6JvLAq-JqycujEJ_7lcspieY7bIiSfzv1Z64"300
TXT"v=spf1 redirect=vocabulary.com.hosted.spf-report.com"300
CAA0 issue "amazon.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 "amazon.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, AAAA 5m, MX 15m, 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: amazon.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.