yuku.com

Checked 22 October 2026, 11:41 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 0 failed 6 info

Registration

info

.com generic · Cloudflare, Inc. · expires 2027-10-27

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Cloudflare, Inc.
Registered
27 October 2000
Last changed
27 September 2026
Expires
27 October 2027
Status
client transfer prohibited
Registry nameservers
cory.ns.cloudflare.com, mira.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 2027-10-27 #3
    The registration is valid until 2027-10-27 (369 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

cory.ns.cloudflare.com, mira.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
cory.ns.cloudflare.com, mira.ns.cloudflare.com
NS in the zone
cory.ns.cloudflare.com, mira.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
cory.ns.cloudflare.com108.162.193.93 172.64.33.93 173.245.59.93 2a06:98c1:50::ac40:215d 2803:f800:50::6ca2:c15d 2606:4700:58::adf5:3b5dAS13335 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., US108.162.193.93 172.64.33.93 173.245.59.93 2606:4700:58::adf5:3b5d 2803:f800:50::6ca2:c15d 2a06:98c1:50::ac40:215d
mira.ns.cloudflare.com108.162.192.204 173.245.58.204 172.64.32.204 2803:f800:50::6ca2:c0cc 2606:4700:50::adf5:3acc 2a06:98c1:50::ac40:20ccAS13335 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., US108.162.192.204 172.64.32.204 173.245.58.204 2606:4700:50::adf5:3acc 2803:f800:50::6ca2:c0cc 2a06:98c1:50::ac40:20cc

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: cory.ns.cloudflare.com, mira.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
cory.ns.cloudflare.com 108.162.193.93NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
cory.ns.cloudflare.com 172.64.33.93NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
cory.ns.cloudflare.com 173.245.59.93NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
cory.ns.cloudflare.com 2a06:98c1:50::ac40:215dNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
cory.ns.cloudflare.com 2803:f800:50::6ca2:c15dNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
cory.ns.cloudflare.com 2606:4700:58::adf5:3b5dNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
mira.ns.cloudflare.com 108.162.192.204NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
mira.ns.cloudflare.com 173.245.58.204NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
mira.ns.cloudflare.com 172.64.32.204NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
mira.ns.cloudflare.com 2803:f800:50::6ca2:c0ccNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
mira.ns.cloudflare.com 2606:4700:50::adf5:3accNOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
mira.ns.cloudflare.com 2a06:98c1:50::ac40:20ccNOERROR, 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: cory.ns.cloudflare.com: "2026.10.2"; mira.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 2417417511 · primary cory.ns.cloudflare.com

Found

Primary (MNAME)
cory.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417417511
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
cory.ns.cloudflare.com (108.162.193.93)2417417511
cory.ns.cloudflare.com (172.64.33.93)2417417511
cory.ns.cloudflare.com (173.245.59.93)2417417511
cory.ns.cloudflare.com (2a06:98c1:50::ac40:215d)2417417511
cory.ns.cloudflare.com (2803:f800:50::6ca2:c15d)2417417511
cory.ns.cloudflare.com (2606:4700:58::adf5:3b5d)2417417511
mira.ns.cloudflare.com (108.162.192.204)2417417511
mira.ns.cloudflare.com (173.245.58.204)2417417511
mira.ns.cloudflare.com (172.64.32.204)2417417511
mira.ns.cloudflare.com (2803:f800:50::6ca2:c0cc)2417417511
mira.ns.cloudflare.com (2606:4700:50::adf5:3acc)2417417511
mira.ns.cloudflare.com (2a06:98c1:50::ac40:20cc)2417417511

Checks

  • ✓ Serial 2417417511 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 cory.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 2417417511 is a Unix timestamp (2046-08-09 08:51 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 CEBBAF280795021C…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 10:41 UTC and expires at 2026-10-23 12:41 UTC.

Records

info

6 records at the apex

Found

Read from
108.162.193.93:53
TypeValueTTL
SOAcory.ns.cloudflare.com. dns.cloudflare.com. 2417417511 10000 2400 604800 18001800
NScory.ns.cloudflare.com.86400
NSmira.ns.cloudflare.com.86400
A188.114.97.2300
A188.114.96.2300
TXT"v=spf1 ip4:13.77.82.104 ip4:40.84.3.83 include:_spf.google.com include:amazonses.com ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 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.
  • 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
  • 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