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https://mk.co.kr

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
80
GRADE
B
FIX
1
REVIEW
6
PASS
2
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
2 PASS 6 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
DNS Records
1 A records, 289 ms lookup
REVIEW
1 A records, 289 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 210.179.172.12
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
No NS records found
Info::
2 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Warning::
DNS resolution is slow (289 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 289 ms
A210.179.172.12
AAAA—
CNAME—
NS—
MX
10 spam1.mk.co.kr
10 spam2.mk.co.kr
TXT
SPF v=spf1 ip4:203.238.56.4 ip4:203.238.56.5 ip4:220.72.24.188 ip4:220.72.24.189 ip4...
google-site-verification=3MV2q9bZibVUUyEKf7lVrou3Fsad6ZoqJqJzMqD65-w
CAALookup not available with standard resolver
Resolved in 289 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

B
Redirect Chain
1 redirect(s), 2397 ms total
REVIEW
1 redirect(s), 2397 ms total
Info::
Single redirect
Got: https://mk.co.kr → https://www.mk.co.kr/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 2397 ms total
Got: 2397 ms

https://mk.co.kr

1163 ms · HTTP/1.1

301

https://www.mk.co.kr/

1234 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://mk.co.kr3011163 msHTTP/1.1
2https://www.mk.co.kr/2001234 msHTTP/1.1App-WEB

See the visual redirect chain in the HTTP Probe tab →

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.mk.co.kr/
200https://mk.co.kr/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://mk.co.kr/ → https://mk.co.kr/

Consistent

C
HTTP Probe Timing
Action
Total 1712 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
545 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
291 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
584 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
1.71 s
Total Time Total request time from DNS lookup through full response.
1.71 s

Connection waterfall

DNS Lookup 545 ms TCP Connect 291 ms TLS Handshake 584 ms Server Processing 291 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
298 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

298
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
Crawlability
robots.txt present, sitemap with 112 URLs
PASS
robots.txt present, sitemap with 112 URLs
Info::
robots.txt is present
Got: 807 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 112 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 807 B Sitemaps referenced 5 User-agents ChatGPT-User, cohere-ai, SemrushBot, AhrefsBot, Bytespider, CCBot, Omgilibot, FacebookBot, CLAUDE-WEB, *, ChatGPT, ClaudeBot, Diffbot, ImagesiftBot, anthropic-ai, Omgili, GPTBot Blocking No — crawling allowed
User-agent: GPTBot

Disallow: /

Allow: /intro


User-agent: SemrushBot

User-agent: AhrefsBot

User-agent: Bytespider

User-agent: ChatGPT

User-agent: CCBot

User-agent: ChatGPT-User

User-agent: anthropic-ai

User-agent: ClaudeBot 

User-agent: Omgilibot

User-agent: Omgili

User-agent: FacebookBot

User-agent: Diffbot

User-agent: ImagesiftBot 

User-agent: cohere-ai

User-agent: CLAUDE-WEB

Disallow: /


User-agent: *


Sitemap: https://www.mk.co.kr/sitemap/sections/

Sitemap: https://www.mk.co.kr/sitemap/latest-articles/

Sitemap: https://www.mk.co.kr/sitemap/daily-articles/

Sitemap: https://www.mk.co.kr/sitemap/daily-images/


Sitemap: https://view.mk.co.kr/sitemap_index.xml

#DaumWebMasterTool:efc5991982b659e20b2b3301894bb0de9a8c2e4b1a7e981d9929a8362367ec78:UnqWlFOxht7LTkCfYYAwxQ==
sitemap.xml 200 OK
Type URL Set URLs 112 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
mk.co.kr — via Inames Co., Ltd.(http://www.inames.co.kr), hosted on KIXS-AS-KR Korea Telecom, KR
PASS
mk.co.kr — via Inames Co., Ltd.(http://www.inames.co.kr), hosted on KIXS-AS-KR Korea Telecom, KR
Info::
Registrar: Inames Co., Ltd.(http://www.inames.co.kr)
Info::
Hosting: KIXS-AS-KR Korea Telecom, KR
Got: AS4766
Domain expiry

Unknown

SSL certificate

298 days

Issued by DigiCert Inc

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

KIXS-AS-KR Korea Telecom, KR

ASN AS4766

210.179.172.12

Registrar

Inames Co., Ltd.(http://www.inames.co.kr)

Lock status unknown 3 NS records
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Registrar Inames Co., Ltd.(http://www.inames.co.kr)
Name Servers ns.mk.co.kr, ns.mkvip.co.kr, ns2.mk.co.kr
Hosting
IP Address 210.179.172.12
ASN AS4766 (KIXS-AS-KR Korea Telecom, KR)
Provider KIXS-AS-KR Korea Telecom, KR
Data source: whois (1.5s)
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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