quillbot.com

Checked 22 October 2026, 10:24 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · Squarespace Domains II LLC · expires 2029-12-21

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Squarespace Domains II LLC
Registered
21 December 2017
Last changed
13 March 2026
Expires
21 December 2029
Status
client delete prohibited, client transfer prohibited
Registry nameservers
karl.ns.cloudflare.com, ruth.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 2029-12-21 #3
    The registration is valid until 2029-12-21 (1155 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

karl.ns.cloudflare.com, ruth.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
karl.ns.cloudflare.com, ruth.ns.cloudflare.com
NS in the zone
karl.ns.cloudflare.com, ruth.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
karl.ns.cloudflare.com172.64.33.190 173.245.59.190 108.162.193.190 2803:f800:50::6ca2:c1be 2a06:98c1:50::ac40:21be 2606:4700:58::adf5:3bbeAS13335 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., US108.162.193.190 172.64.33.190 173.245.59.190 2606:4700:58::adf5:3bbe 2803:f800:50::6ca2:c1be 2a06:98c1:50::ac40:21be
ruth.ns.cloudflare.com173.245.58.143 108.162.192.143 172.64.32.143 2803:f800:50::6ca2:c08f 2a06:98c1:50::ac40:208f 2606:4700:50::adf5:3a8fAS13335 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., US108.162.192.143 172.64.32.143 173.245.58.143 2606:4700:50::adf5:3a8f 2803:f800:50::6ca2:c08f 2a06:98c1:50::ac40:208f

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: karl.ns.cloudflare.com, ruth.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
karl.ns.cloudflare.com 172.64.33.190NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
karl.ns.cloudflare.com 173.245.59.190NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
karl.ns.cloudflare.com 108.162.193.190NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
karl.ns.cloudflare.com 2803:f800:50::6ca2:c1beNOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
karl.ns.cloudflare.com 2a06:98c1:50::ac40:21beNOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
karl.ns.cloudflare.com 2606:4700:58::adf5:3bbeNOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
ruth.ns.cloudflare.com 173.245.58.143NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
ruth.ns.cloudflare.com 108.162.192.143NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
ruth.ns.cloudflare.com 172.64.32.143NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
ruth.ns.cloudflare.com 2803:f800:50::6ca2:c08fNOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
ruth.ns.cloudflare.com 2a06:98c1:50::ac40:208fNOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
ruth.ns.cloudflare.com 2606:4700:50::adf5:3a8fNOERROR, 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: karl.ns.cloudflare.com: "2026.10.2"; ruth.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 2417531761 · primary karl.ns.cloudflare.com

Found

Primary (MNAME)
karl.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417531761
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
karl.ns.cloudflare.com (172.64.33.190)2417531761
karl.ns.cloudflare.com (173.245.59.190)2417531761
karl.ns.cloudflare.com (108.162.193.190)2417531761
karl.ns.cloudflare.com (2803:f800:50::6ca2:c1be)2417531761
karl.ns.cloudflare.com (2a06:98c1:50::ac40:21be)2417531761
karl.ns.cloudflare.com (2606:4700:58::adf5:3bbe)2417531761
ruth.ns.cloudflare.com (173.245.58.143)2417531761
ruth.ns.cloudflare.com (108.162.192.143)2417531761
ruth.ns.cloudflare.com (172.64.32.143)2417531761
ruth.ns.cloudflare.com (2803:f800:50::6ca2:c08f)2417531761
ruth.ns.cloudflare.com (2a06:98c1:50::ac40:208f)2417531761
ruth.ns.cloudflare.com (2606:4700:50::adf5:3a8f)2417531761

Checks

  • ✓ Serial 2417531761 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 karl.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 2417531761 is a Unix timestamp (2046-08-10 16:36 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

56 records at the apex

Found

Read from
172.64.33.190:53
TypeValueTTL
SOAkarl.ns.cloudflare.com. dns.cloudflare.com. 2417531761 10000 2400 604800 18001800
NSkarl.ns.cloudflare.com.86400
NSruth.ns.cloudflare.com.86400
A172.64.151.4300
A104.18.36.252300
AAAA2606:4700:4401::ac40:9704300
AAAA2a06:98c1:3109::6812:24fc300
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX15 c3f7p623wympm3lnqu7dnsu4hn75nyd3ydiusicm6mjtrfyhndqq.verification.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"MS=ms81813137"300
TXT"ZOOM_verify_F7fLjdDLGnmeYgsWjEvEn2"300
TXT"_6zhrzw3fub3oq3mxboqu93d3wn43s46"300
TXT"adobe-idp-site-verification=8b9b597326c953485203409a584c256ae5300d4628d2c614db42c35dbfc4d827"300
TXT"anthropic-domain-verification-bqet5r=Oh1KqaqZYsJ3O7VRgMucZBaMV"300
TXT"atlassian-domain-verification=HuZkEy3RvMSIX6gZ/iF9B/EYH1awgocgR2HXxCaOZLQhFSSaizLaV68WLJ67OdV5"300
TXT"atlassian-domain-verification=OwPlpNGBmAiqXmqiyaGcCQntWc8BAqoiYpmu5sv5ZQISu3RqwyozrkcgRSYNa/CP"300
TXT"brave-ledger-verification=36c8c7f592bc03dfd9435df17a2bfa835f22e1c49fa0dda01d3c050714547579"300
TXT"cursor-domain-verification-7jxyxb=F9OIZCAClvikuONeZ2R2BdKQ1"300
TXT"facebook-domain-verification=91qy5hwor3z1sepgfd12zrd3sadi24"300
TXT"figma-domain-verification=3766b177e535e8739659ee8103c5bada261084bbcffa88e6cbe346b55e518f90-1718123513"300
TXT"figma-domain-verification=9604c8ad4ad855bbe3815d2ebcd45d07bb5d12ef70081fea0d735bd9451aabbd-1764025325"300
TXT"firebase=paraphraser-472c1"300
TXT"gem-domain-verification=Z7p7feJ7uAhWf9GmjzQP"300
TXT"google-site-verification=5h3MfYgr0d5Jr0fPooxYm_lD3sRLtlQEm9d3TY-sjX4"300
TXT"google-site-verification=DLgddiI5LkOG9nhwoZOPnIIyt2zB5-M16pR3DWfirw4"300
TXT"google-site-verification=Fsv3-1u2GPZtbYU-NsqcO3_W4HvA0UkgTPMTOJcHaOE"300
TXT"google-site-verification=Gf3es4l048RYUkQ5CiyCyY0Jcmb7h-nADnNAkjC8tz8"300
TXT"google-site-verification=I51lE_1LKgGWZYXDa3G-q_hbYWsNfq0zHxYeKSoskHQ"300
TXT"google-site-verification=Se_C1kLSP75MXVvuj10qJ16Xl06QjhiAd2HJfYqvYhc"300
TXT"google-site-verification=VNzUs93lnU5UZ3TDMoxzJ9CKIUrNjl1YeRNk78ziY1s"300
TXT"google-site-verification=WDW_WY_iJ_UKMh52r79vSzZny-j2d2xX03oX3s_t6O8"300
TXT"google-site-verification=YBOHojQZCcaPxoDrxAH7ladfl0REJa99dHOwG-IxaKY"300
TXT"google-site-verification=cqtzl5hYIx2SqwMfRD2IbT1kIVmFg11FMGsTc6RASO8"300
TXT"google-site-verification=sK88_GPPtm1v2QDgmwsMF2FbgQK6k4uUcm8veo83j3o"300
TXT"google-site-verification=yxI5S_6yRUvxG-i0WiUMpuO4P2yBnmUkPb_9A79Aki8"300
TXT"klaviyo-site-verification=MVEXcU"300
TXT"knowbe4-site-verification=f92d8da9c7cba1a940cdb382022ce59d"300
TXT"notion-domain-verification=IXUMd60GmcwKZpYbNP3YE4VHnkp1fPJ1CX0FI03Ju6c"300
TXT"v=spf1 include:_spf.google.com include:sendgrid.net include:mail.zendesk.com -all"300
TXT"zeroThreat=MTEzOTk=TVRFek9Uaz0=TVRFek9Uaz"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 "comodoca.com"300
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"300
CAA0 issuewild "godaddy.com"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 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: amazon.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com, godaddy.com.