Skip to content
https://social-plugins.line.me

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
76
GRADE
C
FIX
1
REVIEW
5
PASS
3
INFO
0
Probed from Amsterdam, Netherlands
301 Moved Permanently
Checks
9
3 PASS 5 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.

C
DNS Records
Action
1 A records, 244 ms lookup
REVIEW
1 A records, 244 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 184.30.156.45
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Warning::
CNAME record at zone apex
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
Got: e1102.d.akamaiedge.net
Info::
No NS records found
Info::
No MX records — email not configured via DNS
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
No SPF record found in TXT records
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Warning::
DNS resolution is slow (244 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 244 ms
A184.30.156.45
AAAA—
CNAMEe1102.d.akamaiedge.net
NS—
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 244 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

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.

Learn more ▾

RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.

Source: RFC 1034

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.

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more ▾

SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.

Source: RFC 7208 (SPF)

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), 2159 ms total
REVIEW
1 redirect(s), 2159 ms total
Info::
Single redirect
Got: https://social-plugins.line.me → https://developers.line.biz/?r=/docs/line-social-plugins/ (301)
Warning::
Redirect overhead: 2159 ms total
Got: 2159 ms
Info::
Cross-domain redirect detected

https://social-plugins.line.me

255 ms · HTTP/1.1

301

https://developers.line.biz/?r=/docs/lin...

1904 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://social-plugins.line.me301255 msHTTP/1.1nginx
2https://developers.line.biz/?r=/docs/lin...2001904 msHTTP/1.1nginx

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

C
Crawlability
Action
robots.txt present, sitemap with 0 URLs
REVIEW
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Warning::
sitemap.xml contains invalid XML
Search engines may not be able to parse the sitemap. Fix XML validation errors.
Warning::
sitemap.xml is empty — no URLs found
An empty sitemap provides no value. Add <url> entries for your pages.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.

Learn more ▾

Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.

Source: sitemaps.org / Google Search Central

An empty sitemap provides no value. Add <url> entries for your pages.

Why this matters

An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.

Learn more ▾

Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.

Source: Google Search Central / sitemaps.org

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 10240 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed
<!DOCTYPE html><html  lang="en-US" class="" style=""><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><style id="nuxt-ui-colors">@layer theme {
  :root, :host {
  --ui-color-primary-50: var(--color-green-50, oklch(98.2% 0.018 155.826));
  --ui-color-primary-100: var(--color-green-100, oklch(96.2% 0.044 156.743));
  --ui-color-primary-200: var(--color-green-200, oklch(92.5% 0.084 155.995));
  --ui-color-primary-300: var(--color-green-300, oklch(87.1% 0.15 154.449));
  --ui-color-primary-400: var(--color-green-400, oklch(79.2% 0.209 151.711));
  --ui-color-primary-500: var(--color-green-500, oklch(72.3% 0.219 149.579));
  --ui-color-primary-600: var(--color-green-600, oklch(62.7% 0.194 149.214));
  --ui-color-primary-700: var(--color-green-700, oklch(52.7% 0.154 150.069));
  --ui-color-primary-800: var(--color-green-800, oklch(44.8% 0.119 151.328));
  --ui-color-primary-900: var(--color-green-900, oklch(39.3% 0.095 152.535));
  --ui-color-primary-950: var(--color-green-950, oklch(26.6% 0.065 152.934));
  --ui-color-secondary-50: var(--color-blue-50, oklch(97% 0.014 254.604));
  --ui-color-secondary-100: var(--color-blue-100, oklch(93.2% 0.032 255.585));
  --ui-color-secondary-200: var(--color-blue-200, oklch(88.2% 0.059 254.128));
  --ui-color-secondary-300: var(--color-blue-300, oklch(80.9% 0.105 251.813));
  --ui-color-secondary-400: var(--color-blue-400, oklch(70.7% 0.165 254.624));
  --ui-color-secondary-500: var(--color-blue-500, oklch(62.3% 0.214 259.815));
  --ui-color-secondary-600: var(--color-blue-600, oklch(54.6% 0.245 262.881));
  --ui-color-secondary-700: var(--color-blue-700, oklch(48.8% 0.243 264.376));
  --ui-color-secondary-800: var(--color-blue-800, oklch(42.4% 0.199 265.638));
  --ui-color-secondary-900: var(--color-blue-900, oklch(37.9% 0.146 265.522));
  --ui-color-secondary-950: var(--color-blue-950, oklch(28.2% 0.091 267.935));
  --ui-color-success-50: var(--color-green-50, oklch(98.2% 0.018 155.826));
  --ui-color-success-100: var(--color-green-100, oklch(96.2% 0.044 156.743));
  --ui-color-success-200: var(--color-green-200, oklch(92.5% 0.084 155.995));
  --ui-color-success-300: var(--color-green-300, oklch(87.1% 0.15 154.449));
  --ui-color-success-400: var(--color-green-400, oklch(79.2% 0.209 151.711));
  --ui-color-success-500: var(--color-green-500, oklch(72.3% 0.219 149.579));
  --ui-color-success-600: var(--color-green-600, oklch(62.7% 0.194 149.214));
  --ui-color-success-700: var(--color-green-700, oklch(52.7% 0.154 150.069));
  --ui-color-success-800: var(--color-green-800, oklch(44.8% 0.119 151.328));
  --ui-color-success-900: var(--color-green-900, oklch(39.3% 0.095 152.535));
  --ui-color-success-950: var(--color-green-950, oklch(26.6% 0.065 152.934));
  --ui-color-info-50: var(--color-blue-50, oklch(97% 0.014 254.604));
  --ui-color-info-100: var(--color-blue-100, oklch(93.2% 0.032 255.585));
  --ui-color-info-200: var(--color-blue-200, oklch(88.2% 0.059 254.128));
  --ui-color-info-300: var(--color-blue-300, oklch(80.9% 0.105 251.813));
  --ui-color-info-400: var(--color-blue-400, oklch(70.7% 0.165 254.624));
  --ui-color-info-500: var(--color-blue-500, oklch(62.3% 0.214 259.815));
  --ui-color-info-600: var(--color-blue-600, oklch(54.6% 0.245 262.881));
  --ui-color-info-700: var(--color-blue-700, oklch(48.8% 0.243 264.376));
  --ui-color-info-800: var(--color-blue-800, oklch(42.4% 0.199 265.638));
  --ui-color-info-900: var(--color-blue-900, oklch(37.9% 0.146 265.522));
  --ui-color-info-950: var(--color-blue-950, oklch(28.2% 0.091 267.935));
  --ui-color-warning-50: var(--color-yellow-50, oklch(98.7% 0.026 102.212));
  --ui-color-warning-100: var(--color-yellow-100, oklch(97.3% 0.071 103.193));
  --ui-color-warning-200: var(--color-yellow-200, oklch(94.5% 0.129 101.54));
  --ui-color-warning-300: var(--color-yellow-300, oklch(90.5% 0.182 98.111));
  --ui-color-warning-400: var(--color-yellow-400, oklch(85.2% 0.199 91.936));
  --ui-color-warning-500: var(--color-yellow-500, oklch(79.5% 0.184 86.047));
  --ui-color-warning-600: var(--color-yellow-600, oklch(68.1% 0.162 75.834));
  --ui-color-warning-700: var(--color-yellow-700, oklch(55.4% 0.135 66.442));
  --ui-color-warning-800: var(--color-yellow-800, oklch(47.6% 0.114 61.907));
  --ui-color-warning-900: var(--color-yellow-900, oklch(42.1% 0.095 57.708));
  --ui-color-warning-950: var(--color-yellow-950, oklch(28.6% 0.066 53.813));
  --ui-color-error-50: var(--color-red-50, oklch(97.1% 0.013 17.38));
  --ui-color-error-100: var(--color-red-100, oklch(93.6% 0.032 17.717));
  --ui-color-error-200: var(--color-red-200, oklch(88.5% 0.062 18.334));
  --ui-color-error-300: var(--color-red-300, oklch(80.8% 0.114 19.571));
  --ui-color-error-400: var(--color-red-400, oklch(70.4% 0.191 22.216));
  --ui-color-error-500: var(--color-red-500, oklch(63.7% 0.237 25.331));
  --ui-color-error-600: var(--color-red-600, oklch(57.7% 0.245 27.325));
  --ui-color-error-700: var(--color-red-700, oklch(50.5% 0.213 27.518));
  --ui-color-error-800: var(--color-red-800, oklch(44.4% 0.177 26.899));
  --ui-color-error-900: var(--color-red-900, oklch(39.6% 0.141 25.723));
  --ui-color-error-950: var(--color-red-950, oklch(25.8% 0.092 26.042));
  --ui-color-neutral-50: var(--color-slate-50, oklch(98.4% 0.003 247.858));
  --ui-color-neutral-100: var(--color-slate-100, oklch(96.8% 0.007 247.896));
  --ui-color-neutral-200: var(--color-slate-200, oklch(92.9% 0.013 255.508));
  --ui-color-neutral-300: var(--color-slate-300, oklch(86.9% 0.022 252.894));
  --ui-color-neutral-400: var(--color-slate-400, oklch(70.4% 0.04 256.788));
  --ui-color-neutral-500: var(--color-slate-500, oklch(55.4% 0.046 257.417));
  --ui-color-neutral-600: var(--color-slate-600, oklch(44.6% 0.043 257.281));
  --ui-color-neutral-700: var(--color-slate-700, oklch(37.2% 0.044 257.287));
  --ui-color-neutral-800: var(--color-slate-800, oklch(27.9% 0.041 260.031));
  --ui-color-neutral-900: var(--color-slate-900, oklch(20.8% 0.042 265.755));
  --ui-color-neutral-950: var(--color-slate-950, oklch(12.9% 0.042 264.695));
  }
  :root, :host, .light {
  --ui-primary: var(--ui-color-primary-500);
  --ui-secondary: var(--ui-color-secondary-500);
  --ui-success: var(--ui-color-success-500);
  --ui-info: var(--ui-color-info-500);
  --ui-warning: var(--ui-color-warning-500);
  --ui-error: var(--ui-color-error-500);
  }
  .dark {
  --ui-primary: var(--ui-color-primary-400);
  --ui-secondary: var(--ui-color-secondary-400);
  --ui-success: var(--ui-color-success-400);
  --ui-info: var(--ui-color-info-400);
  --ui-warning: var(--ui-color-warning-400);
  --ui-error: var(--ui-color-error-400);
  }
}</style><title>LINE Developers</title><link rel="preconnect" href="https://fonts.googleapis.com"><link rel="preconnect" href="https://fonts.gstatic.com" crossorigin="anonymous"><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Noto+Sans+JP&display=swap"><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=LINE+Seed+JP:wght@400;700;800&display=swap"><link rel="stylesheet" href="https://static.line-scdn.net/laicon/edge/latest/laicon.min.css"><link rel="stylesheet" href="/_nuxt/entry.XU__DSq0.css" crossorigin><link rel="stylesheet" href="/_nuxt/BaseLayout.DryLLHoQ.css" crossorigin><link rel="stylesheet" href="/_nuxt/TransitionExpand.C7MR6gY2.css" crossorigin><link rel="stylesheet" href="/_nuxt/index.BInUqC-a.css" crossorigin><link rel="stylesheet" href="/_nuxt/NewBadge.SwHpl8c9.css" crossorigin><link rel="preload" as="fetch" crossorigin="anonymous" href="/_payload.json?3b70f8fe-6107-40ef-8d36-db6b89f9c108"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/prkPQDO6.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/Bgms0fH8.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/CrbTXa04.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/DlAUqK2U.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/C-4GxZT9.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/szH1qBxF.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/DPxYUU_D.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/DYgwRWPV.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/PUSqk0tl.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BFu_P-Ux.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/B5eCqZVY.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/CLNKnlQW.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BYT-zroz.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BKXe4xp_.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/ClvyDXd8.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BheWnx7M.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BDornkwx.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BYPZXu6Y.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BffxFq_0.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/0TrngcGz.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/D5ODQtHp.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/J5eZBgOb.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/DUQ2EZlW.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BADamYcw.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BT3Jz119.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/D2IU_SR4.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BTUmY--6.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/h9uDRzKI.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/CoB336W2.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/CeqTCCIG.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/DWBlcy01.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/MOeAtZ1q.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/VGDL7mTD.js"><link rel="modulepreload" as="script" crossorigin href="/_nuxt/BVx47BmE.js"><script type="module
sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML No
B
TLS Certificate Expiry & Recommendations
164 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

164
days left
0d 30d 60d 90d+

Recommended actions

  • 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+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

https://www.social-plugins.line.me/
200https://social-plugins.line.me/

HTTP → HTTPS

301http://social-plugins.line.me/ → https://social-plugins.line.me/

Consistent

A+
Domain Intelligence
line.me — via MarkMonitor Inc., 18 years, 2 months old, hosted on LINE LY Corporation, JP
PASS
line.me — via MarkMonitor Inc., 18 years, 2 months old, hosted on LINE LY Corporation, JP
Info::
Domain registered until Apr 29, 2027 (1 years remaining)
Info::
Registrar: MarkMonitor Inc.
Info::
Registrar lock is enabled
Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.
Info::
Hosting: LINE LY Corporation, JP
Got: AS38631
Domain expiry

318 days

April 29, 2027

SSL certificate

164 days

Issued by DigiCert Inc

Domain age

18 years, 2 months

Registered April 29, 2008

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

LINE LY Corporation, JP

ASN AS38631

147.92.243.206

Registrar

MarkMonitor Inc.

Locked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar MarkMonitor Inc.
Created April 29, 2008 (18 years, 2 months ago)
Expires April 29, 2027 (1 years)
Last Updated April 2, 2026
Name Servers ns1.naver.jp, ns2.naver.jp, ans1.linecorp.com, ans2.linecorp.com
Registrant LY Corporation
Hosting
IP Address 147.92.243.206
ASN AS38631 (LINE LY Corporation, JP)
Provider LINE LY Corporation, JP
Data source: whois (1.6s)

Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.

Why this matters

Registrar lock (clientTransferProhibited et al.) prevents unauthorized domain transfers — strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 283 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
4 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
3 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
283 ms
Total Time Total request time from DNS lookup through full response.
283 ms

Connection waterfall

DNS Lookup 4 ms TCP Connect 1 ms TLS Handshake 3 ms Server Processing 275 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback