Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Probed from Sao Paulo, Brazil

302 Found

Checks

5 PASS 3 REVIEW 1 FIX

CDN & Delivery

Action

No CDN detected

FIX

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.

Redirect Chain

1 redirect(s), 1383 ms total

REVIEW

1 redirect(s), 1383 ms total

Single redirect

Got: https://telegram.me → https://telegram.org/ (302)

Uses 302 (temporary) redirect

If permanent, use 301 instead.

Got: https://telegram.me

Redirect overhead: 1383 ms total

Got: 1383 ms

Cross-domain redirect detected

https://telegram.me

682 ms · HTTP/1.1

302

https://telegram.org/

701 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://telegram.me	302	682 ms	HTTP/1.1	nginx/1.18.0
2	https://telegram.org/	200	701 ms	HTTP/1.1	nginx/1.18.0

See the visual redirect chain in the HTTP Probe tab →

If permanent, use 301 instead.

Why this matters

302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.

Learn more ▾

Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).

Source: Google Search Central

Crawlability

Action

robots.txt present, sitemap with 0 URLs

REVIEW

robots.txt present, sitemap with 0 URLs

robots.txt is present

Got: 10240 bytes

sitemap.xml is present

sitemap.xml contains invalid XML

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

sitemap.xml is empty — no URLs found

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

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 class="">
  <head>
    <meta charset="utf-8">
    <title>Telegram Messenger</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta property="og:title" content="Telegram – a new era of messaging">
    <meta property="og:image" content="https://telegram.org/img/t_logo_2x.png">
    <meta property="og:site_name" content="Telegram">
    <meta property="og:description" content="Fast. Secure. Powerful.">
    
    
    <meta property="fb:app_id" content="254098051407226">
    <meta property="vk:app_id" content="3782569">
    <meta name="apple-itunes-app" content="app-id=686449807">
    <meta name="telegram:channel" content="@telegram">
    
    <link rel="icon" type="image/svg+xml" href="/img/website_icon.svg?4">
<link rel="apple-touch-icon" sizes="180x180" href="/img/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="/img/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/img/favicon-16x16.png">
<link rel="alternate icon" href="/img/favicon.ico" type="image/x-icon" />
    <link href="/css/bootstrap.min.css?3" rel="stylesheet">
    
    <link href="/css/telegram.css?249" rel="stylesheet" media="screen">
  </head>
  <body class="preload">
    <div id="fb-root"></div>
    <div class="tl_page_wrap">
      <div class="tl_page_head navbar navbar-static-top navbar navbar-tg">
        <div class="navbar-inner">
          <div class="container clearfix">
            <ul class="nav navbar-nav navbar-right"><li class="dropdown top_lang_select"><a class="dropdown-toggle" onclick="return dropdownClick(this, event)" href="#"><i class="dev_top_lang_icon"></i> <b class="minicaret"></b></a>
<ul class="dropdown-menu"><li class=""><a href="?setln=en">English</a></li><li class="long "><a href="?setln=id">Bahasa Indonesia</a></li><li class="long "><a href="?setln=ms">Bahasa Melayu</a></li><li class=""><a href="?setln=de">Deutsch</a></li><li class=""><a href="?setln=es">Español</a></li><li class=""><a href="?setln=fr">Français</a></li><li class=""><a href="?setln=it">Italiano</a></li><li class=""><a href="?setln=nl">Nederlands</a></li><li class=""><a href="?setln=uz">O‘zbek</a></li><li class=""><a href="?setln=pl">Polski</a></li><li class="long "><a href="?setln=pt-br">Português (Brasil)</a></li><li class=""><a href="?setln=tr">Türkçe</a></li><li class=""><a href="?setln=be">Беларуская</a></li><li class=""><a href="?setln=ru">Русский</a></li><li class=""><a href="?setln=uk">Українська</a></li><li class=""><a href="?setln=kk">Қазақша</a></li><li class=""><a href="?setln=ar">العربية</a></li><li class=""><a href="?setln=fa">فارسی</a></li><li class=""><a href="?setln=ko">한국어</a></li></ul></li><li class="navbar-twitter hidden-xs"><a href="https://twitter.com/telegram" target="_blank" data-track="Follow/Twitter" onclick="trackDlClick(this, event)"><i class="icon icon-twitter"></i> Twitter</a></li></ul>
<ul class="nav navbar-nav">
  <li class="active"><a href="/">Home</a></li>
  <li class=""><a href="/faq">FAQ</a></li>
  <li class=""><a href="/apps">Apps</a></li>
  <li class="hidden-xs "><a href="//core.telegram.org/api">API</a></li>
  <li class="hidden-xs "><a href="/moderation">Moderation</a></li>
</ul>
          </div>
        </div>
      </div>
      <div class="container clearfix tl_page_container  tl_main_page_container">
        <div class="tl_page">
          <div class="tl_main_wrap">
  <div class="tl_main_head">
    <div class="tl_main_side_blog"><div class="side_blog_wrap">
  <div class="side_blog">
    <a href="/blog" class="side_blog_header">Recent News</a>
    <div class="side_blog_entries">
      <a href="/blog/ai-editor-mighty-polls-and-more" class="side_blog_entry">
  <div class="side_blog_date">Mar 31</div>
  <div class="side_blog_title">AI Editor, Mighty Polls, Live Photos, Bots Managed by Bots, and More</div>
</a><a href="/blog/member-tags-disable-sharing-and-more" class="side_blog_entry">
  <div class="side_blog_date">Mar 1</div>
  <div class="side_blog_title">Member Tags, Login with Telegram, Disable Sharing, GIF Editing, Date Formatting, Voting Timestamps</div>
</a><a href="/blog/crafting-android-design-and-more" class="side_blog_entry">
  <div class="side_blog_date">Feb 9</div>
  <div class="side_blog_title">Android Redesign, Group Ownership Transfer, Gift Crafting, Colored Bot Buttons</div>
</a>
    </div>
  </div>
</div></div>
    <div class="tl_main_logo_wrap">
      <a href="/" class="tl_main_logo">
        <div class="tl_main_logo"></div>
        <svg alt="Telegram" class="tl_main_logo_title_image" height="72" viewBox="0 0 288 72" width="288" xmlns="http://www.w3.org/2000/svg"><path d="m57.015 16.258c5.18 0 9.181 1.652 12.006 4.957 2.824 3.305 4.236 7.98 4.236 14.027v3.446h-24.855c.257 3.14 1.306 5.625 3.146 7.453s4.154 2.742 6.943 2.742c3.914 0 7.102-1.582 9.563-4.746l4.605 4.394c-1.523 2.274-3.556 4.037-6.099 5.291s-5.397 1.881-8.561 1.881c-5.414 0-9.803-1.705-13.166-5.115s-5.045-7.951-5.045-13.623v-1.055c0-3.797.733-7.189 2.198-10.178 1.464-2.988 3.521-5.314 6.169-6.978 2.649-1.664 5.602-2.496 8.86-2.496zm-15.827-12.445v7.171h-15.961v44.016h-8.825v-44.016h-15.82v-7.171zm15.792 19.3c-2.344 0-4.237.821-5.678 2.461-1.441 1.641-2.361 3.926-2.76 6.856h16.278v-.633c-.188-2.859-.95-5.022-2.286-6.486-1.336-1.465-3.187-2.198-5.554-2.198zm30.292 31.887h-8.543v-54h8.543zm24.051.703c-5.414 0-9.803-1.705-13.166-5.115-3.364-3.41-5.045-7.951-5.045-13.623v-1.055c0-3.797.732-7.189 2.197-10.178 1.465-2.988 3.521-5.314 6.17-6.978 2.648-1.664 5.601-2.496 8.859-2.496 5.18 0 9.182 1.652 12.006 4.957s4.236 7.98 4.236 14.027v3.446h-24.855c.258 3.14 1.307 5.625 3.146 7.453 1.84 1.828 4.155 2.742 6.944 2.742 3.914 0 7.101-1.582 9.562-4.746l4.606 4.394c-1.524 2.274-3.557 4.037-6.1 5.291s-5.396 1.881-8.56 1.881zm-1.02-32.59c-2.344 0-4.236.821-5.678 2.461-1.441 1.641-2.361 3.926-2.759 6.856h16.277v-.633c-.188-2.859-.949-5.022-2.285-6.486-1.336-1.465-3.188-2.198-5.555-2.198zm20.41 12.586c0-5.906 1.389-10.623 4.166-14.15 2.778-3.528 6.463-5.291 11.057-5.291 4.336 0 7.746 1.512 10.23 4.535l.387-3.832h7.699v36.879c0 4.992-1.552 8.93-4.658 11.812-3.105 2.883-7.295 4.325-12.568 4.325-2.789 0-5.514-.581-8.174-1.741s-4.682-2.677-6.065-4.552l4.043-5.133c2.625 3.117 5.86 4.676 9.704 4.676 2.836 0 5.074-.768 6.714-2.303 1.641-1.535 2.461-3.791 2.461-6.768v-2.566c-2.461 2.742-5.742 4.113-9.843 4.113-4.454 0-8.092-1.769-10.916-5.308-2.825-3.54-4.237-8.438-4.237-14.696zm8.508.739c0 3.82.779 6.826 2.338 9.017s3.721 3.287 6.486 3.287c3.446 0 6-1.476 7.664-4.429v-16.735c-1.617-2.883-4.148-4.324-7.593-4.324-2.813 0-4.998 1.113-6.557 3.34-1.559 2.226-2.338 5.508-2.338 9.844zm52.719-11.672c-1.125-.188-2.285-.282-3.481-.282-3.914 0-6.55 1.5-7.91 4.5v26.016h-8.543v-38.039h8.156l.211 4.254c2.063-3.305 4.922-4.957 8.579-4.957 1.218 0 2.226.164 3.023.492zm26.07 30.234c-.375-.727-.703-1.91-.984-3.551-2.719 2.836-6.047 4.254-9.985 4.254-3.82 0-6.937-1.09-9.351-3.269-2.414-2.18-3.621-4.875-3.621-8.086 0-4.055 1.506-7.166 4.517-9.334 3.012-2.168 7.319-3.252 12.92-3.252h5.239v-2.496c0-1.969-.551-3.545-1.653-4.729-1.101-1.183-2.777-1.775-5.027-1.775-1.945 0-3.539.486-4.781 1.459-1.243.972-1.864 2.209-1.864 3.709h-8.543c0-2.086.692-4.037 2.075-5.854 1.382-1.816 3.263-3.24 5.642-4.271 2.379-1.032 5.033-1.547 7.963-1.547 4.453 0 8.004 1.119 10.652 3.357 2.649 2.239 4.008 5.385 4.078 9.44v17.156c0 3.422.481 6.152 1.442 8.191v.598zm-9.387-6.152c1.688 0 3.276-.41 4.764-1.231 1.488-.82 2.608-1.922 3.358-3.304v-7.172h-4.606c-3.164 0-5.543.55-7.137 1.652-1.593 1.102-2.39 2.66-2.39 4.676 0 1.64.545 2.947 1.634 3.92 1.09.972 2.549 1.459 4.377 1.459zm32.645-31.887.246 3.973c2.672-3.118 6.328-4.676 10.969-4.676 5.086 0 8.566 1.945 10.441 5.836 2.766-3.891 6.656-5.836 11.672-5.836 4.195 0 7.318 1.16 9.369 3.48 2.051 2.321 3.1 5.742 3.147 10.266v24.996h-8.543v-24.75c0-2.414-.528-4.184-1.582-5.309-1.055-1.125-2.801-1.687-5.239-1.687-1.945 0-3.533.521-4.763 1.564-1.231 1.043-2.092 2.409-2.584 4.096l.035 26.086h-8.543v-25.031c-.117-4.477-2.402-6.715-6.856-6.715-3.421 0-5.847 1.394-7.277 4.184v27.562h-8.543v-38.039z" fill="#4d4d4d"/></svg>
      </a>
      <p class="tl_main_logo_lead">a new era of messaging</p>
    </div>
  </div>

  <div class="tl_main_download_mobile clearfix">
  <a href="/android" class="tl_main_download_link tl_main_download_link_android" data-track="AppDownload/Android" onclick="trackDlClick(this, event)"  onmouseover="mainDemoVideoHover(this, 1)" onmouseout="mainDemoVideoHover(this, 0)">
    <i class="icon icon-android "></i>Telegram for <b>Android</b>
    <div class="tl_main_download_image__android"></div>
    <video class="tl_main_video_player tl_main_video_player__android video__init_retina" muted=""  vindex="1" preload="none" data-sources="/img/t_main_Android_demo.mp4,/img/t_main_Android_demo_2x.mp4"></video>
  </a><a href="/dl/ios" class="tl_main_download_link tl_main_download_link_ios" target="_blank" data-track="AppDownload/iOS" onclick="trackDlClick(this, event)"  onmouseover="mainDemoVideoHover(this, 1)" onmouseout="mainDemoVideoHover(this, 0)">
    <i class="icon icon-ios "></i>Telegram for <b>iPhone</b> / <b>iPad</b>
    <div class="tl_main_download_image__ios"></div>
    <video class="tl_main_video_player tl_main_video_player__ios video__init_retina" muted=""  vindex="1" preload="none" data-sources="/img/t_main_iOS_demo.mp4,/img/t_main_iOS_demo_2x.mp4"></video>
  </a>
  <a href="//desktop.telegram.org/" class="tl_main_download_link tl_main_download_link_tdesktop" data-track="AppDownload/TDesktop" onclick="trackDlClick(this, event)">
  Telegram for <b>Windows / Mac / Linux</b>
</a>

<a class="tl_main_download_more_btn" href="/apps">Browse more Telegram apps<i class="icon icon-arrow-more"></i></a>
</div>
<div class="tl_main_download_desktop_section">
  <h3 class="tl_main_download_desktop_header"></h3>
  <div class="tl_main_download_desktop_wrap1">
    <div class="tl_main_download_desktop_wrap">
      <div class="tl_main_download_desktop clearfix">
        <div class="tl_main_download_desktop_links clearfix">
          <a href="//desktop.telegram.org/" class="tl_main_download_desktop_link tl_main_download_link_td" data-track=

sitemap.xml 200 OK

Type URL Set URLs 0 entries Valid XML No

TLS Certificate Expiry & Recommendations

187 days until leaf cert expires — 4 issues to address

REVIEW

Certificate validity

187

days left

0d 30d 60d 90d+

Recommended actions

Add includeSubDomains to the HSTS directive
Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
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+

DNS Records

1 A records, 67 ms lookup

PASS

1 A records, 67 ms lookup

Resolves to 1 IPv4 address(es)

Got: 149.154.167.99

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

Has 1 IPv6 (AAAA) record(s)

Got: 2001:67c:4e8:f004::9

4 nameserver(s) configured

Got: ns-cloud-d2.googledomains.com, ns-cloud-d4.googledomains.com, ns-cloud-d3.googledomains.com, ns-cloud-d1.googledomains.com

No MX records — email not configured via DNS

CAA records not checked

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

SPF record present in TXT

DNS resolution time: 67 ms

Got: 67 ms

A	149.154.167.99
AAAA	2001:67c:4e8:f004::9
CNAME	—
NS	ns-cloud-d2.googledomains.com, ns-cloud-d4.googledomains.com, ns-cloud-d3.googledomains.com, ns-cloud-d1.googledomains.com
MX	—
TXT	SPF v=spf1 -all
CAA	Lookup not available with standard resolver

Resolved in 67 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.

A+

IPv6 Readiness

IPv6 reachable (188 ms)

PASS

IPv6 reachable (188 ms)

IPv6 is configured and reachable at 2001:67c:4e8:f004::9

Got: 188 ms connect

IPv6 Ready

AAAA Records 2001:67c:4e8:f004::9 Connection Reachable (188 ms)

A+

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

PASS

www/non-www, trailing slash, HTTP→HTTPS

www/non-www redirect configured correctly (preferred: non-www)

HTTP correctly 301-redirects to HTTPS

www / non-www

302https://www.telegram.me/

200https://telegram.me/

Preferred variant: non-www

HTTP → HTTPS

301http://telegram.me/ → https://telegram.me/

Consistent

A+

Domain Intelligence

telegram.me — via GoDaddy.com, LLC, 12 years, 5 months old

PASS

telegram.me — via GoDaddy.com, LLC, 12 years, 5 months old

Domain registered until Jan 7, 2027 (8 months remaining)

Registrar: GoDaddy.com, LLC

Registrar lock is enabled

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

Domain expiry

177 days

January 7, 2027

SSL certificate

187 days

Issued by GoDaddy.com, Inc.

Domain age

12 years, 5 months

Registered January 7, 2014

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2001:67c:4e8:f004::9

Registrar

GoDaddy.com, LLC

Locked 4 NS records

Expiry timeline

Today

+1 year

Domain expiry SSL expiry Danger zone (≤30 days)

Registrar GoDaddy.com, LLC

Created January 7, 2014 (12 years, 5 months ago)

Expires January 7, 2027 (8 months)

Last Updated February 21, 2026

Name Servers ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com, ns-cloud-d4.googledomains.com

Registrant Domains By Proxy, LLC

Hosting

IP Address 2001:67c:4e8:f004::9

Data source: whois (1.5s)

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

HTTP Probe Timing

Total 659 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

3 ms

TCP Connect

217 ms

TLS Handshake

219 ms

Time to First Byte

660 ms

Total Time

660 ms

Connection waterfall

DNS Lookup 3 ms TCP Connect 217 ms TLS Handshake 219 ms Server Processing 220 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.