jvc.com

Checked 22 October 2026, 09:26 UTC · via 8.8.8.8
✗Problems found
21 passed 3 warnings 1 failed 6 info

Registration

info

.com generic · Network Solutions, LLC · expires 2029-09-14

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
15 September 1989
Last changed
9 March 2022
Expires
14 September 2029
Status
client transfer prohibited
Registry nameservers
ns1.jvckenwoodusa.com, ns2.jvckenwoodusa.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 2029-09-14 #3
    The registration is valid until 2029-09-14 (1057 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.jvckenwoodusa.com, ns2.jvckenwoodusa.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.jvckenwoodusa.com, ns2.jvckenwoodusa.com
NS in the zone
ns1.us.jvckenwood.com, ns2.us.jvckenwood.com
NameserverAddressesNetwork (AS)Glue
ns1.jvckenwoodusa.com (parent only)205.182.178.78AS3356 LEVEL3 - Level 3 Parent, LLC, US205.182.178.78
ns1.us.jvckenwood.com (zone only)205.182.178.78AS3356 LEVEL3 - Level 3 Parent, LLC, US-
ns2.jvckenwoodusa.com (parent only)20.51.104.105AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US20.51.104.105
ns2.us.jvckenwood.com (zone only)20.51.104.105AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.jvckenwoodusa.com, ns2.jvckenwoodusa.com.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.jvckenwoodusa.com, ns2.jvckenwoodusa.com; only in the zone: ns1.us.jvckenwood.com, ns2.us.jvckenwood.com. ns2.jvckenwoodusa.com, ns2.us.jvckenwood.com report NS ns1.us.jvckenwood.com ns2.us.jvckenwood.com.
    #7
  • ✓ 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3356 (LEVEL3 - Level 3 Parent, LLC, US): 2 addresses; AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US): 2 addresses.
  • 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 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.jvckenwoodusa.com 205.182.178.78no responsenono / no--
ns1.us.jvckenwood.com 205.182.178.78no responsenono / no--
ns2.jvckenwoodusa.com 20.51.104.105NOERROR, 156 ms, authoritativenoyes / yesrefusedunknown
ns2.us.jvckenwood.com 20.51.104.105NOERROR, 152 ms, authoritativenoyes / yesrefusedunknown

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns1.jvckenwoodusa.com (205.182.178.78): read udp 46.225.38.91:47203->205.182.178.78:53: i/o timeout; ns1.us.jvckenwood.com (205.182.178.78): read udp 46.225.38.91:58941->205.182.178.78:53: i/o timeout.
    #14
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns2.jvckenwoodusa.com: "unknown"; ns2.us.jvckenwood.com: "unknown".
    #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

info

serial 2026102001 · primary ns1.jvc.com

Found

Primary (MNAME)
ns1.jvc.com
Contact (RNAME)
hostmaster.jvc.com
Serial
2026102001
Refresh / retry
10800 s / 900 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns2.jvckenwoodusa.com (20.51.104.105)2026102001
ns2.us.jvckenwood.com (20.51.104.105)2026102001

Checks

  • ✓ Serial 2026102001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 15m, expire 7d, negative TTL 1d.
  • i
    Hidden master
    The primary nameserver ns1.jvc.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact hostmaster@jvc.com #25
    The SOA RNAME hostmaster.jvc.com means hostmaster@jvc.com.
  • ✓ Date-based serial #26
    The serial 2026102001 follows the YYYYMMDDnn convention (2026-10-20).

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

7 records at the apex

Found

Read from
20.51.104.105:53
TypeValueTTL
SOAns1.jvc.com. hostmaster.jvc.com. 2026102001 10800 900 604800 864003600
NSns2.us.jvckenwood.com.3600
NSns1.us.jvckenwood.com.3600
A150.31.252.1833600
MX10 us-smtp-inbound-2.mimecast.com.3600
MX10 us-smtp-inbound-1.mimecast.com.3600
TXT"v=spf1 include:_spf1.jvc.com include:_spf-jp.jvckenwood.com include:us._netblocks.mimecast.com include:spf.protection.outlook.com -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; 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