tistory.com

Checked 22 October 2026, 11:10 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 7 info

Registration

info

.com generic · Megazone Corp., dba HOSTING.KR · expires 2027-10-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Megazone Corp., dba HOSTING.KR
Registered
1 October 2005
Last changed
18 September 2026
Expires
1 October 2027
Status
client transfer prohibited, client update prohibited
Registry nameservers
ns1.daum.net, ns2.daum.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 2027-10-01 #3
    The registration is valid until 2027-10-01 (344 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

ns1.daum.net, ns2.daum.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.daum.net, ns2.daum.net
NS in the zone
ns1.daum.net, ns2.daum.net
NameserverAddressesNetwork (AS)Glue
ns1.daum.net113.61.106.5AS10158 KAKAO-10158-AS-KR-KR - Kakao Corp, KR-
ns2.daum.net113.61.107.5AS10158 KAKAO-10158-AS-KR-KR - Kakao Corp, KR-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.daum.net, ns2.daum.net.
    #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 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS10158 (KAKAO-10158-AS-KR-KR - Kakao Corp, KR): 2 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 .net
    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

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.daum.net 113.61.106.5NOERROR, 225 ms, authoritativenoyes / yesrefused-
ns2.daum.net 113.61.107.5NOERROR, 245 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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

info

serial 1668574860 · primary ns.kakaocorp.com

Found

Primary (MNAME)
ns.kakaocorp.com
Contact (RNAME)
root.kakaocorp.com
Serial
1668574860
Refresh / retry
1800 s / 600 s
Expire
2419200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.daum.net (113.61.106.5)1668574860
ns2.daum.net (113.61.107.5)1668574860

Checks

  • ✓ Serial 1668574860 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 30m, retry 10m, expire 28d, negative TTL 5m.
  • i
    Hidden master (not resolvable)
    The primary nameserver ns.kakaocorp.com is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.
    #24
  • ✓ Contact root@kakaocorp.com #25
    The SOA RNAME root.kakaocorp.com means root@kakaocorp.com.
  • ✓ Timestamp serial #26
    The serial 1668574860 is a Unix timestamp (2022-11-16 05:01 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

12 records at the apex

Found

Read from
113.61.106.5:53
TypeValueTTL
SOAns.kakaocorp.com. root.kakaocorp.com. 1668574860 1800 600 2419200 300600
NSns1.daum.net.600
NSns2.daum.net.600
A211.183.210.24600
A211.183.222.4600
A121.53.223.39600
MX20 alt.aspmx.daum.net.600
MX10 aspmx.daum.net.600
TXT"v=spf1 include:_spf.daum.net ~all"600
TXT"google-site-verification=m453ZX5HCNg7vFtbRv_mAt5GxIJsj4VJw_LFvFKkifI"600
TXT"google-site-verification=Djy29naX64H0z8fGEOEOd-k40Sp65VRnz1sm_thWPhw"600
TXT"google-site-verification=qNAtkd6vDGFuD_z9X42LfkhSbHBZqnUZOTfnFn1jUNc"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.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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