kenwood.com

Checked 22 October 2026, 09:31 UTC · via 8.8.8.8
✗Problems found
22 passed 3 warnings 1 failed 5 info

Registration

info

.com generic · 1API GmbH · expires 2027-09-27

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
1API GmbH
Registered
28 September 1998
Last changed
25 August 2026
Expires
27 September 2027
Status
client transfer prohibited
Registry nameservers
ns1.jvckenwood.com, ns2.jvckenwood.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 2027-09-27 #3
    The registration is valid until 2027-09-27 (339 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

warn

ns1.jvckenwood.com, ns2.jvckenwood.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.jvckenwood.com, ns2.jvckenwood.com
NS in the zone
ns1.jvckenwood.com, ns2.jvckenwood.com
NameserverAddressesNetwork (AS)Glue
ns1.jvckenwood.com182.171.77.136AS2527 So-net - Sony Network Communications Inc., JP182.171.77.136
ns2.jvckenwood.com150.249.242.131AS2527 So-net - Sony Network Communications Inc., JP150.249.242.131

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.jvckenwood.com, ns2.jvckenwood.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 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS2527 (So-net - Sony Network Communications Inc., JP): 2 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.jvckenwood.com 182.171.77.136NOERROR, 255 ms, authoritativeOPENyes / yesrefused9.11.5-P4-5.1+deb10u3-Debian
ns2.jvckenwood.com 150.249.242.131NOERROR, 259 ms, authoritativeOPENyes / yesrefused9.11.5-P4-5.1+deb10u3-Debian

Checks

  • ✓ All respond #14
    All 2 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✗
    Open recursion
    These nameservers resolve names for anyone, which makes them usable for DNS amplification attacks and cache poisoning: ns1.jvckenwood.com (182.171.77.136), ns2.jvckenwood.com (150.249.242.131). Disable recursion on authoritative servers.
    #16
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.jvckenwood.com: "9.11.5-P4-5.1+deb10u3-Debian"; ns2.jvckenwood.com: "9.11.5-P4-5.1+deb10u3-Debian". 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 2026090701 · primary ns1.jvckenwood.com

Found

Primary (MNAME)
ns1.jvckenwood.com
Contact (RNAME)
admin.jvckenwood.com
Serial
2026090701
Refresh / retry
7200 s / 3600 s
Expire
2419200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.jvckenwood.com (182.171.77.136)2026090701
ns2.jvckenwood.com (150.249.242.131)2026090701

Checks

  • ✓ Serial 2026090701 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 1h, expire 28d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.jvckenwood.com is one of the listed nameservers.
  • ✓ Contact admin@jvckenwood.com #25
    The SOA RNAME admin.jvckenwood.com means admin@jvckenwood.com.
  • ✓ Date-based serial #26
    The serial 2026090701 follows the YYYYMMDDnn convention (2026-09-07).

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

8 records at the apex

Found

Read from
182.171.77.136:53
TypeValueTTL
SOAns1.jvckenwood.com. admin.jvckenwood.com. 2026090701 7200 3600 2419200 300300
NSns2.jvckenwood.com.300
NSns1.jvckenwood.com.300
A150.31.252.150300
MX10 ygw06.kenwood.com.300
TXT"google-site-verification=KgkMLgNmXmbWAT6J7VRT2iawrmPtMV3Wq_sssKeTIWM"300
TXT"v=spf1 ~all"300
TXT"facebook-domain-verification=jny8md2zt91lza5pjdb871qorq5kkk"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 2d and in the zone 5m; 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