tsmc.com

Checked 22 October 2026, 11:13 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Gandi SAS · expires 2029-04-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gandi SAS
Registered
8 April 1993
Last changed
10 June 2025
Expires
9 April 2029
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
greg.ns.cloudflare.com, luciane.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 2029-04-09 #3
    The registration is valid until 2029-04-09 (899 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

greg.ns.cloudflare.com, luciane.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
greg.ns.cloudflare.com, luciane.ns.cloudflare.com
NS in the zone
greg.ns.cloudflare.com, luciane.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
greg.ns.cloudflare.com108.162.193.115 173.245.59.115 172.64.33.115 2803:f800:50::6ca2:c173 2a06:98c1:50::ac40:2173 2606:4700:58::adf5:3b73AS13335 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., US108.162.193.115 172.64.33.115 173.245.59.115 2606:4700:58::adf5:3b73 2803:f800:50::6ca2:c173 2a06:98c1:50::ac40:2173
luciane.ns.cloudflare.com162.159.38.120 172.64.34.120 108.162.194.120 2a06:98c1:50::ac40:2278 2606:4700:50::a29f:2678 2803:f800:50::6ca2:c278AS13335 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., US108.162.194.120 162.159.38.120 172.64.34.120 2606:4700:50::a29f:2678 2803:f800:50::6ca2:c278 2a06:98c1:50::ac40:2278

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: greg.ns.cloudflare.com, luciane.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
greg.ns.cloudflare.com 108.162.193.115NOERROR, 7 ms, authoritativenoyes / yesrefused2026.10.2
greg.ns.cloudflare.com 173.245.59.115NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
greg.ns.cloudflare.com 172.64.33.115NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
greg.ns.cloudflare.com 2803:f800:50::6ca2:c173NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
greg.ns.cloudflare.com 2a06:98c1:50::ac40:2173NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
greg.ns.cloudflare.com 2606:4700:58::adf5:3b73NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
luciane.ns.cloudflare.com 162.159.38.120NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
luciane.ns.cloudflare.com 172.64.34.120NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
luciane.ns.cloudflare.com 108.162.194.120NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
luciane.ns.cloudflare.com 2a06:98c1:50::ac40:2278NOERROR, 9 ms, authoritativenoyes / yesrefused2026.10.2
luciane.ns.cloudflare.com 2606:4700:50::a29f:2678NOERROR, 9 ms, authoritativenoyes / yesrefused2026.10.2
luciane.ns.cloudflare.com 2803:f800:50::6ca2:c278NOERROR, 10 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: greg.ns.cloudflare.com: "2026.10.2"; luciane.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 2418081684 · primary greg.ns.cloudflare.com

Found

Primary (MNAME)
greg.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418081684
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
greg.ns.cloudflare.com (108.162.193.115)2418081684
greg.ns.cloudflare.com (173.245.59.115)2418081684
greg.ns.cloudflare.com (172.64.33.115)2418081684
greg.ns.cloudflare.com (2803:f800:50::6ca2:c173)2418081684
greg.ns.cloudflare.com (2a06:98c1:50::ac40:2173)2418081684
greg.ns.cloudflare.com (2606:4700:58::adf5:3b73)2418081684
luciane.ns.cloudflare.com (162.159.38.120)2418081684
luciane.ns.cloudflare.com (172.64.34.120)2418081684
luciane.ns.cloudflare.com (108.162.194.120)2418081684
luciane.ns.cloudflare.com (2a06:98c1:50::ac40:2278)2418081684
luciane.ns.cloudflare.com (2606:4700:50::a29f:2678)2418081684
luciane.ns.cloudflare.com (2803:f800:50::6ca2:c278)2418081684

Checks

  • ✓ Serial 2418081684 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 greg.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 2418081684 is a Unix timestamp (2046-08-17 01:21 UTC).

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

40 records at the apex

Found

Read from
108.162.193.115:53
TypeValueTTL
SOAgreg.ns.cloudflare.com. dns.cloudflare.com. 2418081684 10000 2400 604800 18001800
NSgreg.ns.cloudflare.com.86400
NSluciane.ns.cloudflare.com.86400
A172.66.0.3300
A162.159.140.3300
MX10 mxa-00233401.gslb.pphosted.com.300
MX10 mxb-00233401.gslb.pphosted.com.300
TXT"140ri467a8tip3r1vnv25o06mo"300
TXT"2ov06064lraftss0vh4olgshkk"300
TXT"7hj6c9phvanmh67guanthdan1r"300
TXT"8d2iusbb7irip884hb6ms4s59s"300
TXT"MS=84100E767556BF704619CA30ABA8C68DFCE0B9CD"300
TXT"MS=F3CAA82622CD80B33C45CC9B28596A9CB16D9ABC"300
TXT"MS=ms77757997"300
TXT"SLuHJUuojxOjaKLBk5wC5Xj6J2bbS2S7-5nkRQSofRY"300
TXT"akcpnhdqqef2en514hck7ddi67"300
TXT"apple-domain-verification=tUda5X8CcfnlbC8M"300
TXT"autodesk-domain-verification=sCb2h4dY5AR2NZB02vfQ"300
TXT"ca3-a1dea913f018440f931158c45a21ddb4"300
TXT"docusign=c72cc22a-c348-4c56-ac1a-6e36c665f16d"300
TXT"duo_sso_verification=iOQAUnu49ZqSE0nVF4joa89JcxztqYG2dPzI2ZFU4nKzdsMbHRxFaL3yjDxnc5UV"300
TXT"f7ae5354-36b1-4be7-ae29-729f0b43a928"300
TXT"figma-domain-verification=2a76a318530de0c2ec06b8b46f02941478c4b4b4d8b44154a14a74c8932ae980-1755571889"300
TXT"gf51o429n8i2rj31ac7qbelmrs"300
TXT"google-site-verification=cMyfQq9OyJrveXdXvV4y-vzyys8T8vUtu9U8utLCDMI"300
TXT"j7ccu3a32nqmq88ac7233fbu7n"300
TXT"jamf-site-verification=m_Icn7sMcm4g3dK4MYWGZw"300
TXT"llhf0rjce9veu7c0j483t1km4n"300
TXT"nuh7vpdbcedno7ms6aeqao1pvb"300
TXT"oj5o81m0hm93f1fcj4rvaj14qi"300
TXT"p8c8gphns2mkon2gnqbpojm67a"300
TXT"pexip-ms-tenant-domain-verification=090d1d2f-dd3f-40ad-a618-30d1ad63f773"300
TXT"plpg4fbipkcvj984h86rum24lb"300
TXT"q4nsr9n12oethm6a4nb91nc1sm"300
TXT"qu1p2n808gl0garve3ptfgs8lv"300
TXT"successfactors-site-verification=NGI4NTBhMjFhMjcxZWVmNjExN2IyMjZhNGQyZjk2MWEyOGUwYTAxNzBkYzhiOTQ3YjE5ZDRlMDk2NTk3OGJhMA=="300
TXT"tpfo8jhdn67j1ba6vqd8a7it2b"300
TXT"tvj0mirfagv8rdpsil3fkuinek"300
TXT"v7db7s9q1vqskol3g6hinefhfn"300
TXT"v=spf1 ip4:12.97.68.128/27 ip4:203.66.245.0/24 ip4:185.132.181.205/32 ip4:185.183.29.212/32 include:_dcomprod.tsmc.com -all"300

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