skhynix.com

Checked 22 October 2026, 10:43 UTC · via 8.8.8.8
✗Problems found
21 passed 5 warnings 1 failed 3 info

Registration

info

.com generic · Gabia, Inc. · expires 2027-04-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gabia, Inc.
Registered
9 April 2011
Last changed
22 December 2025
Expires
9 April 2027
Status
client transfer prohibited
Registry nameservers
ns.skhynix.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 2027-04-09 #3
    The registration is valid until 2027-04-09 (169 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

ns.skhynix.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns.skhynix.com
NS in the zone
ns.hynix.com
NameserverAddressesNetwork (AS)Glue
ns.hynix.com (zone only)166.125.250.77AS23581 HYNIX-AS-KR-KR - Hynix Semiconductor Inc., KR-
ns.skhynix.com (parent only)166.125.250.77AS23581 HYNIX-AS-KR-KR - Hynix Semiconductor Inc., KR166.125.250.77

Checks

  • ✗
    1 nameserver
    At least two nameservers are required (RFC 1034), so the domain keeps working when one is down: ns.skhynix.com.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns.skhynix.com; only in the zone: ns.hynix.com. ns.hynix.com, ns.skhynix.com report NS ns.hynix.com.
    #7
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns.skhynix.com.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • !
    Nameservers in one network
    all IPv4 addresses are in 166.125.250.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS23581 (HYNIX-AS-KR-KR - Hynix Semiconductor Inc., 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
  • !
    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
ns.hynix.com 166.125.250.77NOERROR, 283 ms, authoritativenoyes / yesrefused-
ns.skhynix.com 166.125.250.77NOERROR, 284 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

warn

serial 2003 · primary ns.hynix.com

Found

Primary (MNAME)
ns.hynix.com
Contact (RNAME)
root.ns.skhynix.com
Serial
2003
Refresh / retry
3600 s / 3600 s
Expire
259200 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
ns.hynix.com (166.125.250.77)2003
ns.skhynix.com (166.125.250.77)2003

Checks

  • ✓ Serial 2003 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h; expire 3d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 1h, retry 1h, expire 3d, negative TTL 12h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.hynix.com is one of the listed nameservers.
  • ✓ Contact root@ns.skhynix.com #25
    The SOA RNAME root.ns.skhynix.com means root@ns.skhynix.com.
  • ✓ Counter serial #26
    The serial 2003 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

16 records at the apex

Found

Read from
166.125.250.77:53
TypeValueTTL
SOAns.hynix.com. root.ns.skhynix.com. 2003 3600 3600 259200 4320014400
NSns.hynix.com.14400
A20.196.144.36300
MX50 invmail4.skhynix.com.14400
MX40 invmail3.skhynix.com.14400
MX20 invmail.skhynix.com.14400
MX10 vmail.skhynix.com.14400
MX0 antispam.skhynix.com.14400
TXT"figma-domain-verification=2c531e58210792ca42d9a8ea3140426fdf556b0423404395b11371dd1f9abf20-1784609339"3
TXT"MS=ms43509319"3
TXT"adobe-idp-site-verification=28083f6222f7880b3201bfcabd0578615d110450228932ebb876a1c711029798"3
TXT"paloaltonetworks-site-verification=6c69aa6221bb4f2562717e1bc81b23cbe81a664210fd14d38970dc54d6fa627b"3
TXT"toast-domain-verification=0ZAj0aerXFYtx2zX4rbf"3
TXT"v=spf1 ip4:166.125.252.71 ip4:166.125.252.73 ip4:166.125.252.76 ip4:166.125.252.79 ip4:166.125.252.85 ip4:166.125.252.90 ip4:166.125.252.92 include:_spfblocka.toast.com -all"3
TXT"anthropic-domain-verification-9rgsyj=cTCtFKXMPzmh19oxNcL0E4w14"3
TXT"openai-domain-verification=dv-dbZulEDjXvImXh8tsg1Wuuku"3

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 4h, NS 4h. The NS TTL at the parent is 2d and in the zone 4h; 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