quantum.com

Checked 22 October 2026, 10:24 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Network Solutions, LLC · expires 2027-03-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
8 March 1995
Last changed
8 January 2026
Expires
9 March 2027
Status
client transfer prohibited
Registry nameservers
cleo.ns.cloudflare.com, sloan.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 2027-03-09 #3
    The registration is valid until 2027-03-09 (137 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

cleo.ns.cloudflare.com, sloan.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
cleo.ns.cloudflare.com, sloan.ns.cloudflare.com
NS in the zone
cleo.ns.cloudflare.com, sloan.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
cleo.ns.cloudflare.com172.64.33.89 173.245.59.89 108.162.193.89 2a06:98c1:50::ac40:2159 2606:4700:58::adf5:3b59 2803:f800:50::6ca2:c159AS13335 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., US108.162.193.89 172.64.33.89 173.245.59.89 2606:4700:58::adf5:3b59 2803:f800:50::6ca2:c159 2a06:98c1:50::ac40:2159
sloan.ns.cloudflare.com172.64.34.52 108.162.194.52 162.159.38.52 2606:4700:50::a29f:2634 2a06:98c1:50::ac40:2234 2803:f800:50::6ca2:c234AS13335 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., US108.162.194.52 162.159.38.52 172.64.34.52 2606:4700:50::a29f:2634 2803:f800:50::6ca2:c234 2a06:98c1:50::ac40:2234

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: cleo.ns.cloudflare.com, sloan.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
cleo.ns.cloudflare.com 172.64.33.89NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
cleo.ns.cloudflare.com 173.245.59.89NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
cleo.ns.cloudflare.com 108.162.193.89NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
cleo.ns.cloudflare.com 2a06:98c1:50::ac40:2159NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
cleo.ns.cloudflare.com 2606:4700:58::adf5:3b59NOERROR, 7 ms, authoritativenoyes / yesrefused2026.10.2
cleo.ns.cloudflare.com 2803:f800:50::6ca2:c159NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
sloan.ns.cloudflare.com 172.64.34.52NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
sloan.ns.cloudflare.com 108.162.194.52NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
sloan.ns.cloudflare.com 162.159.38.52NOERROR, 33 ms, authoritativenoyes / yesrefused2026.10.2
sloan.ns.cloudflare.com 2606:4700:50::a29f:2634NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
sloan.ns.cloudflare.com 2a06:98c1:50::ac40:2234NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
sloan.ns.cloudflare.com 2803:f800:50::6ca2:c234NOERROR, 5 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: cleo.ns.cloudflare.com: "2026.10.2"; sloan.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 2417074567 · primary cleo.ns.cloudflare.com

Found

Primary (MNAME)
cleo.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417074567
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
cleo.ns.cloudflare.com (172.64.33.89)2417074567
cleo.ns.cloudflare.com (173.245.59.89)2417074567
cleo.ns.cloudflare.com (108.162.193.89)2417074567
cleo.ns.cloudflare.com (2a06:98c1:50::ac40:2159)2417074567
cleo.ns.cloudflare.com (2606:4700:58::adf5:3b59)2417074567
cleo.ns.cloudflare.com (2803:f800:50::6ca2:c159)2417074567
sloan.ns.cloudflare.com (172.64.34.52)2417074567
sloan.ns.cloudflare.com (108.162.194.52)2417074567
sloan.ns.cloudflare.com (162.159.38.52)2417074567
sloan.ns.cloudflare.com (2606:4700:50::a29f:2634)2417074567
sloan.ns.cloudflare.com (2a06:98c1:50::ac40:2234)2417074567
sloan.ns.cloudflare.com (2803:f800:50::6ca2:c234)2417074567

Checks

  • ✓ Serial 2417074567 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 cleo.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 2417074567 is a Unix timestamp (2046-08-05 09:36 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

info

24 records at the apex

Found

Read from
172.64.33.89:53
TypeValueTTL
SOAcleo.ns.cloudflare.com. dns.cloudflare.com. 2417074567 10000 2400 604800 18001800
NScleo.ns.cloudflare.com.86400
NSsloan.ns.cloudflare.com.86400
A217.114.94.2300
MX10 quantum-com.mail.protection.outlook.com.21600
TXT"/9CSatnN+b8dKh99F0fXS40T2EgpQU/LWhelN9VUwy8tVPBKWdmgzR6AVPb6CVKuH/8qTID/igt8IPw5Sty/6A=="300
TXT"GXBfZKCCSpGrjPX0HpLrrtE1qBMT5NNUcU1YvERyWEw="300
TXT"MS=6AC70F0D3BE7A527B103039E5D76397FCCB05BAA"300
TXT"MS=ms36556134"300
TXT"ZOOM_verify_pz9uG6gyAPbn65ZD07h62p"300
TXT"_globalsign-domain-verification=q6CPZD8Wwhb7iZhg0-lY1FerQTexIr8CODYO9xT0Ti"300
TXT"a1023050689940a48ed7fa17f6bce177"300
TXT"anthropic-domain-verification-w1xf0t=k1HDjRaAvKLGLisr3RbDJvCAY"300
TXT"apple-domain-verification=qYsNVBlfoh9Zqp9r"300
TXT"atlassian-domain-verification=nnVJ39DQDTx6aAUKosnCUnpJ07nvaZaXht0KfyxpuhLoQKdBIzcagD45Od7S7DzL"300
TXT"atlassian-sending-domain-verification=e0419a47-5578-4fe2-8436-547c1cc0322a"300
TXT"cisco-ci-domain-verification=184206e7d4d66ec8825cba2d1d2c12d0ad4f3d69970cf73e489a338081155667"300
TXT"figma-domain-verification=5f385f464083fe026ef4752a6ec3eade59691e76c3a80dc067d39ce6e10b1b35-1778777775"300
TXT"miro-verification=dd9ec212d360a0a43bc915fcdd8a29381f59a4cb"300
TXT"openai-domain-verification=dv-Z0tHR4wxFMao04c5BB0LkiqY"300
TXT"qgUlD8cMsmWqYsewj/Ph1MYuDKuBfC1M68FipaguL7qAiFgRrqVGFv536iYIsYFgVnAgmB+l2Qln1Q0kkzpgXw=="300
TXT"teamviewer-sso-verification=fb2bf92665a34902b4e570e0a9808241"300
TXT"v=spf1 ip4:146.174.192.0/18 ip4:50.57.196.251 ip4:67.139.72.104 ip4:202.189.79.91 ip4:68.171.172.82 ip4:138.1.36.217 include:spf.protection.outlook.com include:mktomail.com include:_spf.salesforce.com include:spf1.satmetrix.com include:spf.mindmatrix.net " "include:_spf.psm.knowbe4.com -all"300
TXT"webexdomainverification.=4e5f5d43-175b-4eb4-9fb4-0a4227baf38c"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 6h, 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