tdk.com

Checked 22 October 2026, 10:55 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · Japan Registry Services Co., Ltd. · expires 2027-08-06

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Japan Registry Services Co., Ltd.
Registered
7 August 1996
Last changed
12 November 2023
Expires
6 August 2027
Status
active
Registry nameservers
ns-1271.awsdns-30.org, ns-1942.awsdns-50.co.uk, ns-345.awsdns-43.com, ns-578.awsdns-08.net
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 2027-08-06 #3
    The registration is valid until 2027-08-06 (287 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-1271.awsdns-30.org, ns-1942.awsdns-50.co.uk, ns-345.awsdns-43.com, ns-578.awsdns-08.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1271.awsdns-30.org, ns-1942.awsdns-50.co.uk, ns-345.awsdns-43.com, ns-578.awsdns-08.net
NS in the zone
ns-1271.awsdns-30.org, ns-1942.awsdns-50.co.uk, ns-345.awsdns-43.com, ns-578.awsdns-08.net
NameserverAddressesNetwork (AS)Glue
ns-1271.awsdns-30.org205.251.196.247 2600:9000:5304:f700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1942.awsdns-50.co.uk205.251.199.150 2600:9000:5307:9600::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-345.awsdns-43.com205.251.193.89 2600:9000:5301:5900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.89 2600:9000:5301:5900::1
ns-578.awsdns-08.net205.251.194.66 2600:9000:5302:4200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1271.awsdns-30.org, ns-1942.awsdns-50.co.uk, ns-345.awsdns-43.com, ns-578.awsdns-08.net.
  • ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1271.awsdns-30.org 205.251.196.247NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1271.awsdns-30.org 2600:9000:5304:f700::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1942.awsdns-50.co.uk 205.251.199.150NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns-1942.awsdns-50.co.uk 2600:9000:5307:9600::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-345.awsdns-43.com 205.251.193.89NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-345.awsdns-43.com 2600:9000:5301:5900::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-578.awsdns-08.net 205.251.194.66NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-578.awsdns-08.net 2600:9000:5302:4200::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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

warn

serial 1 · primary ns-1942.awsdns-50.co.uk

Found

Primary (MNAME)
ns-1942.awsdns-50.co.uk
Contact (RNAME)
hostmaster.tdk.com
Serial
1
Refresh / retry
60 s / 600 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns-1271.awsdns-30.org (205.251.196.247)1
ns-1271.awsdns-30.org (2600:9000:5304:f700::1)1
ns-1942.awsdns-50.co.uk (205.251.199.150)1
ns-1942.awsdns-50.co.uk (2600:9000:5307:9600::1)1
ns-345.awsdns-43.com (205.251.193.89)1
ns-345.awsdns-43.com (2600:9000:5301:5900::1)1
ns-578.awsdns-08.net (205.251.194.66)1
ns-578.awsdns-08.net (2600:9000:5302:4200::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 1m is outside 20m–1d; retry 10m should be shorter than refresh 1m. Current values: refresh 1m, retry 10m, expire 14d, negative TTL 5m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1942.awsdns-50.co.uk is one of the listed nameservers.
  • ✓ Contact hostmaster@tdk.com #25
    The SOA RNAME hostmaster.tdk.com means hostmaster@tdk.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

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

31 records at the apex

Found

Read from
205.251.196.247:53
TypeValueTTL
SOAns-1942.awsdns-50.co.uk. hostmaster.tdk.com. 1 60 600 1209600 30060
NSns-1271.awsdns-30.org.86400
NSns-1942.awsdns-50.co.uk.86400
NSns-345.awsdns-43.com.86400
NSns-578.awsdns-08.net.86400
A202.238.239.243300
MX10 mxa-00549401.gslb.pphosted.com.300
MX10 mxb-00549401.gslb.pphosted.com.300
TXT"BPL=6914239"3600
TXT"BPL=7645804"3600
TXT"DVFNS3OGjnVzqDyu78S3tnL6pkFIDT"3600
TXT"_7p4fkgwcbi92hlxcdw0d3hxw2v665vc"3600
TXT"_globalsign-domain-verification=-SpOi2Mjrc4DSHrFNgKc-m7GMKrtM7ugukOU9-nSyY"3600
TXT"_globalsign-domain-verification=vskCprANZlNx3rAqg_OwzuNnxWJFm6_8XnZ2L4VCGE"3600
TXT"_mb04hwuyyt76hrgeu6l95t7eguh7het"3600
TXT"_xgsg8skle73pccltrxsrxrfdp7wvrj8"3600
TXT"atlassian-domain-verification=8dpB0Twlc/J6dX3nGNeqlaXHNwhBPjuBeCaWuMmgvqUsiNUkmTF0GDMnzYSdJ/pz"3600
TXT"atlassian-domain-verification=EK/7pJHgW574gGaTd8tBHA2jCbPRZLiVs/aTxPRnBP2ZycM7HHFN5nPNBhcqZEnQ"3600
TXT"atlassian-domain-verification=PlXRD2tgXmlDo7etcdxxkl92suipoQSPXf+EijSoZaxRkJtatyTpYUv3o93gaRvZ"3600
TXT"atlassian-domain-verification=VQnazKvLUsvl4bRpN5tG7U6anlcbS8J9Z6qvz5fU4BruWVl8UUQXVKuHqQk0CJLg"3600
TXT"atlassian-domain-verification=WKtmylPXSmFQbsEaQxJmXd3Hl845EW0HNsOBaEawOTkBUs4//Q6S4IhiNxQn3iT5"3600
TXT"atlassian-domain-verification=dR0kNpsTXP6Qb7zsKwMiR4m2qXkatRGTk1dA07QSweOtolC4RHq2qTr3OGMOtQP5"3600
TXT"bw=InD6EZQ7Ig9L5Uba7Dtp36KbtQXw1YtEWnKm1Ucrb98T"3600
TXT"globalsign-domain-verification=HKeGvxfgZwUc46Rqb0pnC9PUBJOWAzp43GkygUv0WA"3600
TXT"krrhz61l7k4mlx514y67ptwwj4xwgvkn"3600
TXT"mKbnAtKK1MLcf4QLkgOyQcYQR78jZ1"3600
TXT"miro-verification=983e270a6c38df8ec4dae564f9a386134d9800e0"3600
TXT"nitro-verification-code=LTM0NjQyMjk2ODUyMjIxMzMxNTc="3600
TXT"smartsheet-site-validation=DCyffRDXw1PYGRT9R5qpu5FXsyd6iUPs"3600
TXT"swisssign-check=EuFeeY9unjGy7D8ggqUuy9N7V70"3600
TXT"v=spf1 mx ip4:83.125.118.114 ip4:213.164.73.25 ip4:213.182.155.252 ip4:50.201.119.0/24 ip4:24.38.43.32/27 ip4:107.20.210.250 ip4:52.1.14.157 ip4:210.161.158.221 ip4:211.16.239.3" " +ip4:208.3.66.30 ip4:213.164.73.28 ip4:212.211.211.138 ip4:18.182.88.44 ip4:213.182.155.253 ip4:133.186.35.50 ip4:217.115.75.10 ip4:217.115.75.9 ip4:14.136.217.243 ip4:118.143.146.243 ip4:205.220.173.21" " +ip4:205.220.161.21 ip4:213.164.65.51 ip4:161.189.53.222 ip4:205.220.178.95 ip4:205.220.166.95 ip4:129.148.11.192 ip4:103.220.10.110 ip4:210.75.13.231 ip4:3.123.206.219 ip4:3.68.129.51" " +include:_netblocks.eloqua.com include:_spf.ultipro.com include:_spf.rexx-systems.com include:spf-00549402.pphosted.com -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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