yokogawa.com

Checked 22 October 2026, 11:40 UTC · via 8.8.8.8
✗Problems found
21 passed 4 warnings 3 failed 3 info

Registration

info

.com generic · PSI-Japan, Inc. · expires 2027-10-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
PSI-Japan, Inc.
Registered
9 October 1998
Last changed
9 October 2026
Expires
8 October 2027
Status
client transfer prohibited
Registry nameservers
zns001-0m9001.yokogawa.co.jp, zns001-0m9002.yokogawa.co.jp, zns001-0m9006.yokogawa.co.jp, zns001-kz9021.yokogawa.co.jp, zns001-kz9022.yokogawa.co.jp
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 2027-10-08 #3
    The registration is valid until 2027-10-08 (350 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

fail

zns001-0m9001.yokogawa.co.jp, zns001-0m9002.yokogawa.co.jp, zns001-0m9006.yokogawa.co.jp, zns001-kz9021.yokogawa.co.jp, zns001-kz9022.yokogawa.co.jp

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
zns001-0m9001.yokogawa.co.jp, zns001-0m9002.yokogawa.co.jp, zns001-0m9006.yokogawa.co.jp, zns001-kz9021.yokogawa.co.jp, zns001-kz9022.yokogawa.co.jp
NS in the zone
zns001-0m9001.yokogawa.co.jp, zns001-0m9002.yokogawa.co.jp, zns001-0m9006.yokogawa.co.jp, zns001-kz9021.yokogawa.co.jp
NameserverAddressesNetwork (AS)Glue
zns001-0m9001.yokogawa.co.jp210.160.226.240AS4713 OCN - NTT DOCOMO BUSINESS,Inc., JP-
zns001-0m9002.yokogawa.co.jp210.160.226.241AS4713 OCN - NTT DOCOMO BUSINESS,Inc., JP-
zns001-0m9006.yokogawa.co.jp202.33.29.254AS4725 ODN - SoftBank Corp., JP-
zns001-kz9021.yokogawa.co.jp121.119.225.68AS4713 OCN - NTT DOCOMO BUSINESS,Inc., JP-
zns001-kz9022.yokogawa.co.jp (parent only)121.119.225.68AS4713 OCN - NTT DOCOMO BUSINESS,Inc., JP-

Checks

  • ✓ 5 nameservers #6
    Delegated to zns001-0m9001.yokogawa.co.jp, zns001-0m9002.yokogawa.co.jp, zns001-0m9006.yokogawa.co.jp, zns001-kz9021.yokogawa.co.jp, zns001-kz9022.yokogawa.co.jp.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: zns001-kz9022.yokogawa.co.jp. zns001-0m9001.yokogawa.co.jp, zns001-0m9002.yokogawa.co.jp, zns001-0m9006.yokogawa.co.jp report NS zns001-0m9001.yokogawa.co.jp zns001-0m9002.yokogawa.co.jp zns001-0m9006.yokogawa.co.jp zns001-kz9021.yokogawa.co.jp.
    #7
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✗
    Nameserver names are CNAMEs
    Nameserver names must not be aliases (RFC 2181 10.3): zns001-kz9022.yokogawa.co.jp -> zns001-kz9021.yokogawa.co.jp.
    #9
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 3 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS4713 (OCN - NTT DOCOMO BUSINESS,Inc., JP): 4 addresses; AS4725 (ODN - SoftBank Corp., JP): 1 address.
  • i
    All nameserver names under .jp
    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

3 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
zns001-0m9001.yokogawa.co.jp 210.160.226.240NOERROR, 259 ms, authoritativenoyes / yesrefusedYokogawa Electric Corporation
zns001-0m9002.yokogawa.co.jp 210.160.226.241NOERROR, 249 ms, authoritativenoyes / yesrefusedYokogawa Electric Corporation
zns001-0m9006.yokogawa.co.jp 202.33.29.254NOERROR, 258 ms, authoritativenoyes / yesrefused9.20.26
zns001-kz9021.yokogawa.co.jp 121.119.225.68SERVFAIL, 256 ms, NOT authoritativenono / yesrefusedYokogawa Electric Corporation
zns001-kz9022.yokogawa.co.jp 121.119.225.68SERVFAIL, 253 ms, NOT authoritativenono / yesrefusedYokogawa Electric Corporation

Checks

  • ✓ All respond #14
    All 5 nameserver addresses answered.
  • ✗
    Lame delegation
    These nameservers don't answer authoritatively for the zone, so resolvers ignore them: zns001-kz9021.yokogawa.co.jp (121.119.225.68): SERVFAIL, authoritative=false; zns001-kz9022.yokogawa.co.jp (121.119.225.68): SERVFAIL, authoritative=false.
    #15
  • ✓ 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: zns001-0m9006.yokogawa.co.jp: "9.20.26". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: zns001-kz9021.yokogawa.co.jp (121.119.225.68): ; zns001-kz9022.yokogawa.co.jp (121.119.225.68): .
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026102001 · primary zns001-0m9006.yokogawa.co.jp

Found

Primary (MNAME)
zns001-0m9006.yokogawa.co.jp
Contact (RNAME)
dnsmaster.ml.jp.yokogawa.com
Serial
2026102001
Refresh / retry
10800 s / 1800 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
zns001-0m9001.yokogawa.co.jp (210.160.226.240)2026102001
zns001-0m9002.yokogawa.co.jp (210.160.226.241)2026102001
zns001-0m9006.yokogawa.co.jp (202.33.29.254)2026102001

Checks

  • ✓ Serial 2026102001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver zns001-0m9006.yokogawa.co.jp is one of the listed nameservers.
  • ✓ Contact dnsmaster@ml.jp.yokogawa.com #25
    The SOA RNAME dnsmaster.ml.jp.yokogawa.com means dnsmaster@ml.jp.yokogawa.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

38 records at the apex

Found

Read from
210.160.226.240:53
TypeValueTTL
SOAzns001-0m9006.yokogawa.co.jp. dnsmaster.ml.jp.yokogawa.com. 2026102001 10800 1800 3600000 86400186400
NSzns001-0m9006.yokogawa.co.jp.186400
NSzns001-kz9021.yokogawa.co.jp.186400
NSzns001-0m9001.yokogawa.co.jp.186400
NSzns001-0m9002.yokogawa.co.jp.186400
A52.198.196.206300
MX5 yokogawa-com.mail.protection.outlook.com.186400
TXT"pardot860323=5b9c61d4421894d7c1185a80fe166df4ae2777bb81e1b789eb19b129064920ce"3600
TXT"00D2v000001eM7q=1TBRA00000003nV"3600
TXT"xpCSWGEDuHdn3aQU89PizFc6RKLZJmbs1029_39390"3600
TXT"atlassian-domain-verification=QDH3ZK59r1dkQFBqK64aG5ParX4l1N1mXRuKRvUEvKZpd2G2sipD6lrhoNMOq8Cl"3600
TXT"63cd1rdu6dprtvih13t4f3771d"3600
TXT"duo_sso_verification=foGY7F4jg2zi6GYewPMq6j0dav640R8WfHHkLOI9ayBjt3Hyosrsvdz9AzUlNBxh"3600
TXT"anthropic-domain-verification-6kkaxq=QQjN2nrahqLgGUq2DLiPnfSQN"3600
TXT"l61ck10ccvkgil424n8n10up58"3600
TXT"knowbe4-site-verification=e7794d7bda684d093a0887cd8eeca39e"3600
TXT"ec0jaq2fqsn6qpr9l1la2n2j7m"3600
TXT"_xf5qdfrpunrilke5fgic5nucnawq63q"3600
TXT"pardot1064921=e1cfbc129c2a9f38b9d8732842c6cc40825a173b487da3170f4c7c38fa97319f"3600
TXT"v=spf1 ip4:192.28.158.195 ip4:192.28.158.196 ip4:199.15.215.25 ip4:199.15.215.26 ip4:199.15.215.83 ip4:199.15.215.84/31 ip4:199.15.215.86 ip4:210.160.226.240/31 ip4:20.210.48.173 ip4:20.89.31.78" " ip4:209.61.151.0/24 ip4:166.78.68.0/22 ip4:198.61.254.0/23 ip4:192.237.158.0/23 ip4:23.253.182.0/23 ip4:104.130.96.0/28 ip4:146.20.113.0/24 ip4:146.20.191.0/24 ip4:159.135.224.0/20 ip4:69.72.32.0/20" " ip4:104.130.122.0/23 ip4:146.20.112.0/26 ip4:161.38.192.0/20 ip4:143.55.224.0/21 ip4:143.55.232.0/22 ip4:159.112.240.0/20 ip4:198.244.48.0/20 ip4:204.220.168.0/21 ip4:204.220.176.0/20 ip4:141.193.32.0/23" " ip4:159.135.140.80/29 ip4:159.135.132.128/25 ip4:161.38.204.0/22 ip4:87.253.232.0/21 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22 ip4:143.55.236.0/22 ip4:198.244.60.0/22 ip4:204.220.160.0/21" " include:spf.protection.outlook.com include:_spf.salesforce.com include:aspmx.pardot.com include:kairos3.com include:amazonses.com " " include:spf.servicecentral.com ~all"3600
TXT"pardot920683=4d77d93d5ebe057790103b8e438fc9781ff15d5ea94735dbe290382619b3d3d8"3600
TXT"pardot1118503=b229a428704f3509ad9a43f15fff94f164b085949dff1cb7e056ae69d4c6b5fc"3600
TXT"p39z4w034737lt6j5xghmk1fhbmxw42p"3600
TXT"_7r0pvq71xd2qyils16gqd6pym8gl4o4"3600
TXT"p2815rrmlx0gtwfc6qm3r3gznjpr2f60"3600
TXT"varn8g8fhbro48a2hn0tmicrsl"3600
TXT"docusign=fcdaa465-07db-4427-b766-902094d7cc2f"3600
TXT"jxzsk2JKgDQkAhNrt8DnBqAYCMJiFPd01105_31655"3600
TXT"yclk081cjp3019n896pztyl7cdvyc6z5"3600
TXT"apple-domain-verification=fqj2O0pDzrWKcpCD"3600
TXT"jh6lyd607gkk8t23gpqf6dyz0kncf1n1"3600
TXT"1jho0bq3b4sup231fst1sgl5pj"3600
TXT"pardot920683=e5d331ed3fd5c62740f43ac5a5f913c3aa5ae129cda8c6181760ee28574dc596"3600
TXT"apple-domain-verification=GiQktmFipwnMNueI"3600
TXT"pardot542003=553ef174bcfd025e3ef24bb3a192ec8b0e775bb23456508ae1c304ce5c58525c"3600
TXT"nitro-verification-code=LTMxNzQ0NTUyMjc4NjczNzE0MzY="3600
TXT"cisco-ci-domain-verification=150da34463335be6c38226267f0e67798c289a980d92d0b28a863461ed4ab869"3600
TXT"docusign=b3553b20-2f52-4872-a534-4c620ac5c531"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 51h46m40s, NS 51h46m40s. The NS TTL at the parent is 2d and in the zone 51h46m40s; 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