uptimerobot.com

Checked 22 October 2026, 11:16 UTC · via 8.8.8.8
!Passed with warnings
29 passed 1 warning 0 failed 5 info

Registration

info

.com generic · Cloudflare, Inc. · expires 2034-01-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Cloudflare, Inc.
Registered
1 January 2010
Last changed
7 August 2026
Expires
1 January 2034
Status
client transfer prohibited
Registry nameservers
cruz.ns.cloudflare.com, darwin.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 2034-01-01 #3
    The registration is valid until 2034-01-01 (2628 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

cruz.ns.cloudflare.com, darwin.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
cruz.ns.cloudflare.com, darwin.ns.cloudflare.com
NS in the zone
cruz.ns.cloudflare.com, darwin.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
cruz.ns.cloudflare.com172.64.32.88 173.245.58.88 108.162.192.88 2606:4700:50::adf5:3a58 2a06:98c1:50::ac40:2058 2803:f800:50::6ca2:c058AS13335 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., US108.162.192.88 172.64.32.88 173.245.58.88 2606:4700:50::adf5:3a58 2803:f800:50::6ca2:c058 2a06:98c1:50::ac40:2058
darwin.ns.cloudflare.com173.245.59.151 108.162.193.151 172.64.33.151 2a06:98c1:50::ac40:2197 2803:f800:50::6ca2:c197 2606:4700:58::adf5:3b97AS13335 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., US108.162.193.151 172.64.33.151 173.245.59.151 2606:4700:58::adf5:3b97 2803:f800:50::6ca2:c197 2a06:98c1:50::ac40:2197

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: cruz.ns.cloudflare.com, darwin.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
cruz.ns.cloudflare.com 172.64.32.88NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
cruz.ns.cloudflare.com 173.245.58.88NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
cruz.ns.cloudflare.com 108.162.192.88NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
cruz.ns.cloudflare.com 2606:4700:50::adf5:3a58NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
cruz.ns.cloudflare.com 2a06:98c1:50::ac40:2058NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
cruz.ns.cloudflare.com 2803:f800:50::6ca2:c058NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 173.245.59.151NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 108.162.193.151NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 172.64.33.151NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2a06:98c1:50::ac40:2197NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2803:f800:50::6ca2:c197NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2606:4700:58::adf5:3b97NOERROR, 14 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: cruz.ns.cloudflare.com: "2026.10.2"; darwin.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 2417810409 · primary cruz.ns.cloudflare.com

Found

Primary (MNAME)
cruz.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417810409
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
cruz.ns.cloudflare.com (172.64.32.88)2417810409
cruz.ns.cloudflare.com (173.245.58.88)2417810409
cruz.ns.cloudflare.com (108.162.192.88)2417810409
cruz.ns.cloudflare.com (2606:4700:50::adf5:3a58)2417810409
cruz.ns.cloudflare.com (2a06:98c1:50::ac40:2058)2417810409
cruz.ns.cloudflare.com (2803:f800:50::6ca2:c058)2417810409
darwin.ns.cloudflare.com (173.245.59.151)2417810409
darwin.ns.cloudflare.com (108.162.193.151)2417810409
darwin.ns.cloudflare.com (172.64.33.151)2417810409
darwin.ns.cloudflare.com (2a06:98c1:50::ac40:2197)2417810409
darwin.ns.cloudflare.com (2803:f800:50::6ca2:c197)2417810409
darwin.ns.cloudflare.com (2606:4700:58::adf5:3b97)2417810409

Checks

  • ✓ Serial 2417810409 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 cruz.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 2417810409 is a Unix timestamp (2046-08-13 22:00 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
23 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 55B5BE5C45258239…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 10:16 UTC and expires at 2026-10-23 12:16 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

pass

27 records at the apex

Found

Read from
172.64.32.88:53
TypeValueTTL
SOAcruz.ns.cloudflare.com. dns.cloudflare.com. 2417810409 10000 2400 604800 18001800
NScruz.ns.cloudflare.com.86400
NSdarwin.ns.cloudflare.com.86400
A104.26.14.202300
A172.67.71.214300
A104.26.15.202300
AAAA2606:4700:20::681a:eca300
AAAA2606:4700:20::681a:fca300
AAAA2606:4700:20::ac43:47d6300
MX1 smtp.google.com.300
TXT"google-site-verification=9KWbwBQALrsyXwrjKpWeVoNwNPtFg0dUw6YYCGJm3XM"300
TXT"google-site-verification=Sxw_gTmzBTR20f-vGmlynG4n-WnpAM8Elw-UmoA63Bc"300
TXT"google-site-verification=YKjNjmG-O202YsY2ICLy0fA6P6frWAZc6czmwho6Yw0"300
TXT"stripe-verification=3eed8573d59a2722011bcb790fc1c9f7822971c24885fa07f442fb877f689201"300
TXT"stripe-verification=a06d85c2e14c5e6e50641b8fd57093bef6d44136395a387e86adb278d2da4e25"300
TXT"v=MCPv1; k=ed25519; p=w/R9pqkp1aIn3/KOXWJSY1Huhw2RfuGUytS4sYkUGY4="300
TXT"v=spf1 a mx ip4:216.144.250.150 include:_spf.google.com include:amazonses.com include:sendgrid.net -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 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: comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.