uptimeinstitute.com

Checked 22 October 2026, 11:16 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Cloudflare, Inc. · expires 2027-01-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Cloudflare, Inc.
Registered
10 January 2000
Last changed
9 April 2025
Expires
10 January 2027
Status
client transfer prohibited
Registry nameservers
darwin.ns.cloudflare.com, gwen.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 2027-01-10 #3
    The registration is valid until 2027-01-10 (80 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

darwin.ns.cloudflare.com, gwen.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
darwin.ns.cloudflare.com, gwen.ns.cloudflare.com
NS in the zone
darwin.ns.cloudflare.com, gwen.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
darwin.ns.cloudflare.com173.245.59.151 108.162.193.151 172.64.33.151 2a06:98c1:50::ac40:2197 2606:4700:58::adf5:3b97 2803:f800:50::6ca2:c197AS13335 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
gwen.ns.cloudflare.com108.162.192.160 172.64.32.160 173.245.58.160 2a06:98c1:50::ac40:20a0 2606:4700:50::adf5:3aa0 2803:f800:50::6ca2:c0a0AS13335 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., US108.162.192.160 172.64.32.160 173.245.58.160 2606:4700:50::adf5:3aa0 2803:f800:50::6ca2:c0a0 2a06:98c1:50::ac40:20a0

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: darwin.ns.cloudflare.com, gwen.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
darwin.ns.cloudflare.com 173.245.59.151NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 108.162.193.151NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 172.64.33.151NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2a06:98c1:50::ac40:2197NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2606:4700:58::adf5:3b97NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
darwin.ns.cloudflare.com 2803:f800:50::6ca2:c197NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
gwen.ns.cloudflare.com 108.162.192.160NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
gwen.ns.cloudflare.com 172.64.32.160NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gwen.ns.cloudflare.com 173.245.58.160NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gwen.ns.cloudflare.com 2a06:98c1:50::ac40:20a0NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gwen.ns.cloudflare.com 2606:4700:50::adf5:3aa0NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
gwen.ns.cloudflare.com 2803:f800:50::6ca2:c0a0NOERROR, 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: darwin.ns.cloudflare.com: "2026.10.2"; gwen.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 2417986062 · primary darwin.ns.cloudflare.com

Found

Primary (MNAME)
darwin.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417986062
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
darwin.ns.cloudflare.com (173.245.59.151)2417986062
darwin.ns.cloudflare.com (108.162.193.151)2417986062
darwin.ns.cloudflare.com (172.64.33.151)2417986062
darwin.ns.cloudflare.com (2a06:98c1:50::ac40:2197)2417986062
darwin.ns.cloudflare.com (2606:4700:58::adf5:3b97)2417986062
darwin.ns.cloudflare.com (2803:f800:50::6ca2:c197)2417986062
gwen.ns.cloudflare.com (108.162.192.160)2417986062
gwen.ns.cloudflare.com (172.64.32.160)2417986062
gwen.ns.cloudflare.com (173.245.58.160)2417986062
gwen.ns.cloudflare.com (2a06:98c1:50::ac40:20a0)2417986062
gwen.ns.cloudflare.com (2606:4700:50::adf5:3aa0)2417986062
gwen.ns.cloudflare.com (2803:f800:50::6ca2:c0a0)2417986062

Checks

  • ✓ Serial 2417986062 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 darwin.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 2417986062 is a Unix timestamp (2046-08-15 22:47 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

32 records at the apex

Found

Read from
173.245.59.151:53
TypeValueTTL
SOAdarwin.ns.cloudflare.com. dns.cloudflare.com. 2417986062 10000 2400 604800 18001800
NSdarwin.ns.cloudflare.com.86400
NSgwen.ns.cloudflare.com.86400
A172.67.69.53300
A104.26.9.243300
A104.26.8.243300
AAAA2606:4700:20::681a:9f3300
AAAA2606:4700:20::ac43:4535300
AAAA2606:4700:20::681a:8f3300
MX10 us-smtp-inbound-1.mimecast.com.300
MX10 us-smtp-inbound-2.mimecast.com.300
TXT"3cq1kqpxzbftfbyzg2xq8zky84w6nx71"60
TXT"3dvsxrjdl1j8qwfrytnhs7cj6qb46g23"60
TXT"MS=ms78093241"60
TXT"QdC6cUngFhDwbJLgdwC6ZtYXvDEDs7CV"60
TXT"_4p16y00dum2fc0epjo85pgdigbl3lah"60
TXT"_vujzgc9xx6stki4qlfsco7dixrr7ms6"60
TXT"anthropic-domain-verification-ea7twf=MoePxuswOSG4NsAhFBHkWCcHt"60
TXT"apple-domain-verification=LIowntudsQftj06w"60
TXT"atlassian-domain-verification=Na967p1ITmY8aZxmSRBtcWGBwlmNZKLmCo19/iihgWyPSxyVEphQg2R1oBye6Va/"60
TXT"atlassian-sending-domain-verification=a501c484-f4e3-4b78-8397-ee6c86162416"60
TXT"bv6jrgmxczngpynmtxz00ljm8bgbz280"60
TXT"facebook-domain-verification=oqe7q3wtvn25c5toxqu4primojfep8"60
TXT"google-site-verification=At-okBVYUzq08ueFJFN1brG_rDXEvjRNjMaP8-HC3yo"60
TXT"google-site-verification=YOrouaW67pcaonAhRK4tZbXQsiKGp6i-8J0Btoaq4X0"60
TXT"google-site-verification=mYfMLBJKjaHb8nZASOSPiR8NVmJAqajLSiCowQiS4q0"60
TXT"intacct-esk=4FED1A55D8DD7088E053D706A8C0E546"60
TXT"knowbe4-site-verification=d31cbbdf5cc86ebf5f39b248e1c64f51"60
TXT"logmein-verification-code=b616b453-170e-4d35-8e06-7758ebb3e6a0"60
TXT"lws94zq2hyhj1c8cg9pkl4lslsbdlsf0"60
TXT"smartsheet-site-validation=tv_CrlTmBnRb5u-PtZdayxc39v7X3S62"60
TXT"v=spf1 include:mktomail.com include:us._netblocks.mimecast.com include:_spf.atlassian.net include:_spf.salesforce.com include:_spf.intacct.com include:spf.US.exclaimer.net ip4:199.15.212.163 ~all"60

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