kt.com

Checked 22 October 2026, 09:33 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

info

.com generic · Inames Co., Ltd. · expires 2027-06-21

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Inames Co., Ltd.
Registered
22 June 1995
Last changed
20 May 2026
Expires
21 June 2027
Status
client transfer prohibited
Registry nameservers
name.kt.co.kr, name2.kt.co.kr
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 2027-06-21 #3
    The registration is valid until 2027-06-21 (241 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

name.kt.co.kr, name2.kt.co.kr

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
name.kt.co.kr, name2.kt.co.kr
NS in the zone
name.kt.co.kr, name2.kt.co.kr, name3.kt.co.kr
NameserverAddressesNetwork (AS)Glue
name.kt.co.kr14.63.152.5AS4766 KIXS-AS-KR-KR - Korea Telecom, KR-
name2.kt.co.kr14.63.240.240AS4766 KIXS-AS-KR-KR - Korea Telecom, KR-
name3.kt.co.kr (zone only)14.63.152.5AS4766 KIXS-AS-KR-KR - Korea Telecom, KR-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: name.kt.co.kr, name2.kt.co.kr.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: name3.kt.co.kr. name.kt.co.kr, name2.kt.co.kr, name3.kt.co.kr report NS name.kt.co.kr name2.kt.co.kr name3.kt.co.kr.
    #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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS4766 (KIXS-AS-KR-KR - Korea Telecom, KR): 3 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 .kr
    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

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
name.kt.co.kr 14.63.152.5NOERROR, 302 ms, authoritativenoyes / yesrefused-
name2.kt.co.kr 14.63.240.240NOERROR, 306 ms, authoritativenoyes / yesrefused-
name3.kt.co.kr 14.63.152.5NOERROR, 307 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 3 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

pass

serial 2026102201 · primary name.kt.co.kr

Found

Primary (MNAME)
name.kt.co.kr
Contact (RNAME)
boan.kt.co.kr
Serial
2026102201
Refresh / retry
10800 s / 3600 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
name.kt.co.kr (14.63.152.5)2026102201
name2.kt.co.kr (14.63.240.240)2026102201
name3.kt.co.kr (14.63.152.5)2026102201

Checks

  • ✓ Serial 2026102201 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver name.kt.co.kr is one of the listed nameservers.
  • ✓ Contact boan@kt.co.kr #25
    The SOA RNAME boan.kt.co.kr means boan@kt.co.kr.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

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

26 records at the apex

Found

Read from
14.63.152.5:53
TypeValueTTL
SOAname.kt.co.kr. boan.kt.co.kr. 2026102201 10800 3600 1209600 864008600
NSname2.kt.co.kr.600
NSname.kt.co.kr.600
NSname3.kt.co.kr.600
A14.63.149.115600
MX10 mail.kt.com.600
TXT"atlassian-domain-verification=UB8nYcMxWXtDXlkeuPDzkg/etVi1Q7rBSlliflmfLzoGbI/Cc/ivaz7KWYdzkZFk"600
TXT"CAue/yKV5UsLfDauaNj7n5jRyJvVSa67C1HnjlD3ANI2bEfPFJlTaojiH8VbH/GF2eVwHaKgVpLlY+t3LjzOFw=="600
TXT"openai-domain-verification=dv-23mJCb6YJahhstCHDTp4iGR4"600
TXT"google-site-verification=MuHitm-zWDyMXMZXYyEqxE98W6kcfL4Ee1Ph9fPYF2Q"600
TXT"v=spf1 ip4:14.63.245.0/24 ip4:211.252.120.49 ip4:211.252.120.84 ip4:211.252.120.117 ip4:221.168.51.0/24 include:spf.protection.outlook.com include:_spf.google.com -all"600
TXT"google-gws-recovery-domain-verification=65957383"600
TXT"atlassian-sending-domain-verification=501e13ea-de52-4c49-85d9-9a56ce9a3ac4"600
TXT"google-gws-recovery-domain-verification=44013416"600
TXT"MS=ms63549104"600
TXT"I/8q5wh8AOSunmUpRY1OlIz/ieYea8NEEfCI6t75jg3Jo8laNOWEXAKsGYUq+btNl7s9gPdmdLPaQn3Jrgp5Eg=="600
TXT"lovable_verification=SS5nZePJPzAHu1M4NwKC"600
TXT"miro-verification=16b6bc73fdc188e3b3e94b68c9d8017d88596cea"600
TXT"facebook-domain-verification=bykbwt2ft1n3brozmw5841vxt5mj35"600
TXT"domain-verification=e8268a23e9d00f3988444d21aa824918c09f79cdb0b50e1837a6e637bade0dcb"600
TXT"cursor-domain-verification-x58ajr=tQlaUafI5TIrYs7dy31uyJlvA"600
TXT"apple-domain-verification=TYAcaeeuRZe57n3G"600
TXT"asv=dabb51d2bee08b9b5f985d89d54af954"600
TXT"google-site-verification=bdgSgFHc0_YSHgIFZZy-5sqGn2kxH8RApVumDPhIn64"600
TXT"google-site-verification=DmtHvV4Zcn50oYNajz6Vx3HUclqF9UB4r8vU-o8H2sE"600
TXT"anthropic-domain-verification-1rmsq2=0kncP3nXvHrpEoPiteUY5s9ud"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, NS 10m. The NS TTL at the parent is 2d and in the zone 10m; 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