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https://rs-online.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
84
GRADE
B
FIX
0
REVIEW
4
PASS
5
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
5 PASS 4 REVIEW
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.rs-online.com/
200https://rs-online.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://rs-online.com/ → https://www.rs-online.com/

Consistent

B
TLS Certificate Expiry & Recommendations
216 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

216
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
B
CDN & Delivery
Akamai
REVIEW
Akamai
Info::
Site is served via Akamai CDN
Got: server header
CDN Detected: Akamai
Provider Akamai Evidence server header
A+
DNS Records
1 A records, 35 ms lookup
PASS
1 A records, 35 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 23.194.21.152
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
6 nameserver(s) configured
Got: a16-64.akam.net, a9-67.akam.net, a20-65.akam.net, a1-40.akam.net, a11-67.akam.net, a24-66.akam.net
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::
SPF record present in TXT
Info::
DNS resolution time: 35 ms
Got: 35 ms
A23.194.21.152
AAAA—
CNAME—
NSa16-64.akam.net, a9-67.akam.net, a20-65.akam.net, a1-40.akam.net, a11-67.akam.net, a24-66.akam.net
MX—
TXT
google-site-verification=RBE1IsYYAD_ir7et26N31nHSHv3iBfWCLWVDFQUABew
SPF v=spf1 include:_spf.sidetrade.net ip4:77.32.138.90 -all
_yjd6jv8alhyam0nt8qrpexvgkwy67ng
google-site-verification=HMz0pF5OnuLUUR4dSFOqgEWWjV-b0mJgPmusGQnpWPQ
_zwdz73foe8n55f3ruzm78wyltclqup8
_o9qflaurq16dbcesvb4ltaspotoghfp
google-site-verification=tSFFgvzujE1U-tUU685U1jvmIrcyYG9ywqpxFhsFJ_Q
_1imreq0et39x3es2qqagecvzdahps7j
google-site-verification=PxHfKuP-SREIWxKqwc9DkQHCR2MVr19kLJ4rCENAxxk
_gev0xrf4dugc7cql2jbf1zmhrwxkbol
CAALookup not available with standard resolver
Resolved in 35 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
Redirect Chain
1 redirect(s), 99 ms total
PASS
1 redirect(s), 99 ms total
Info::
Single redirect
Got: https://rs-online.com → https://www.rs-online.com/ (301)
Info::
WWW normalization redirect

https://rs-online.com

6 ms · HTTP/1.1

301

https://www.rs-online.com/

93 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://rs-online.com3016 msHTTP/1.1AkamaiGHost
2https://www.rs-online.com/20093 msHTTP/1.1AkamaiNetStorage

See the visual redirect chain in the HTTP Probe tab →

A
Crawlability
robots.txt present, sitemap with 0 URLs
PASS
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
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.

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"><head><meta charSet="utf-8"/><meta content="width=device-width" name="viewport"/><link rel="preload" as="image" href="https://media.rs-online.com/siteImages/rootDomain/hero-image.png" fetchPriority="high"/><link rel="preload" as="image" href="https://media.rs-online.com/siteImages/footer/facebook.svg"/><link rel="preload" as="image" href="https://media.rs-online.com/siteImages/footer/twitter.svg"/><link rel="preload" as="image" href="https://media.rs-online.com/siteImages/footer/linkedin.svg"/><link rel="preload" as="image" href="https://media.rs-online.com/siteImages/footer/youtube.svg"/><link rel="preload" as="image" href="https://media.rs-online.com/siteImages/footer/instagram.svg"/><link rel="preload" as="image" href="https://media.rs-online.com/siteImages/footer/tiktok.svg"/><meta content="no-cache" http-equiv="cache-control"/><meta content="RS is a global product &amp; service solutions provider for the maintenance, repair &amp; operation of industry, providing access to 750,000 industrial products." name="Description"/><link href="https://rsgroup.com/assets/img/icons/favicon.ico" rel="shortcut icon" type="image/x-icon"/><title>RS: Industrial Solutions and Product Distributor in 32 Countries</title><link href="https://uk.rs-online.com/static/fonts/ion-fonts.css" rel="stylesheet"/><style>
              #distrelec-banner { display: none; }
            </style><script>
                (function () {
                  const queryString = new URLSearchParams(location.search);

                  if (queryString.get('referrer') === 'distrelec') {
                    const style = document.createElement('style');
                    style.textContent = '#distrelec-banner{display:block}#distrelec-banner p:first-of-type{margin-bottom:1.25rem}';
                    document.head.appendChild(style);
                  }
                })();
              </script><script type="text/javascript">
              window.rs = {
                web: {
                  digitalData: {
                    breakpoint: window.innerWidth >= 1024 ? "1024px - max" :
                                window.innerWidth >= 768 ? "768px - 1024px" :
                                window.innerWidth >= 600 ? "600px - 768px" :
                                "0px - 600px",
                    page_name: "Root Domain",
                    page_type: "Root Domain",
                    site_section: "Root Domain",
                    site_type: "responsive",
                    ecSystemId: "responsive",
                    pageCreationDate: "Root domain page - 20/06/2024",
                    store: "rootdomain",
                  },
                },
              }
            </script><script type="text/javascript">
              (function(a,b,c,d){
                a="//tags.tiqcdn.com/utag/rs.components/rs-emea/prod/utag.js";
                b=document;c='script';d=b.createElement(c);d.src=a;d.type='text/java'+c;d.async=true;
                a=b.getElementsByTagName(c)[0];a.parentNode.insertBefore(d,a);
              })();
            </script><script src="//nexus.ensighten.com/rscomponents/responsiveprod/Bootstrap.js" type="text/javascript"></script><style>*,:after,:before{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:rgba(59,130,246,.5);--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:rgba(59,130,246,.5);--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }/*! tailwindcss v3.4.19 | MIT License | https://tailwindcss.com*/*,:after,:before{border:0 solid;box-sizing:border-box}:after,:before{--tw-content:""}:host,html{line-height:1.5;-webkit-text-size-adjust:100%;font-family:Noto Sans,Roboto,sans-serif;font-feature-settings:normal;font-variation-settings:normal;-moz-tab-size:4;tab-size:4;-webkit-tap-highlight-color:transparent}body{line-height:inherit;margin:0}hr{border-top-width:1px;color:inherit;height:0}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,pre,samp{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-size:1em;font-variation-settings:normal}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{border-collapse:collapse;border-color:inherit;text-indent:0}button,input,optgroup,select,textarea{color:inherit;font-family:inherit;font-feature-settings:inherit;font-size:100%;font-variation-settings:inherit;font-weight:inherit;letter-spacing:inherit;line-height:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dd,dl,figure,h1,h2,h3,h4,h5,h6,hr,p,pre{margin:0}fieldset{margin:0}fieldset,legend{padding:0}menu,ol,ul{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::placeholder,textarea::placeholder{color:#9ca3af;opacity:1}[role=button],button{cursor:pointer}:disabled{cursor:default}audio,canvas,embed,iframe,img,object,svg,video{display:block;vertical-align:middle}img,video{height:auto;max-width:100%}[hidden]:where(:not([hidden=until-found])){display:none}body{color:#393939}.container{margin-left:auto;margin-right:auto;padding-left:1rem;padding-right:1rem;width:100%}@media (min-width:760px){.container{max-width:760px}}@media (min-width:1024px){.container{max-width:1024px}}@media (min-width:1288px){.container{max-width:1288px}}.relative{position:relative}.mb-10{margin-bottom:2.5rem}.mb-2{margin-bottom:.5rem}.mb-6{margin-bottom:1.5rem}.ml-2{margin-left:.5rem}.ml-4{margin-left:1rem}.mt-1{margin-top:.25rem}.mt-6{margin-top:1.5rem}.flex{display:flex}.grid{display:grid}.size-10{height:2.5rem;width:2.5rem}.size-6{height:1.5rem;width:1.5rem}.size-8{height:2rem;width:2rem}.h-16{height:4rem}.h-6{height:1.5rem}.h-60{height:15rem}.min-h-screen{min-height:100vh}.w-16{width:4rem}.flex-auto{flex:1 1 auto}.shrink-0{flex-shrink:0}.grow{flex-grow:1}.cursor-pointer{cursor:pointer}.grid-cols-1{grid-template-columns:repeat(1,minmax(0,1fr))}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.gap-2{gap:.5rem}.gap-5{gap:1.25rem}.gap-6{gap:1.5rem}.space-x-2>:not([hidden])~:not([hidden]){--tw-space-x-reverse:0;margin-left:calc(.5rem*(1 - var(--tw-space-x-reverse)));margin-right:calc(.5rem*var(--tw-space-x-reverse))}.space-x-3>:not([hidden])~:not([hidden]){--tw-space-x-reverse:0;margin-left:calc(.75rem*(1 - var(--tw-space-x-reverse)));margin-right:calc(.75rem*var(--tw-space-x-reverse))}.space-y-14>:not([hidden])~:not([hidden]){--tw-space-y-reverse:0;margin-bottom:calc(3.5rem*var(--tw-space-y-reverse));margin-top:calc(3.5rem*(1 - var(--tw-space-y-reverse)))}.space-y-6>:not([hidden])~:not([hidden]){--tw-space-y-reverse:0;margin-bottom:calc(1.5rem*var(--tw-space-y-reverse));margin-top:calc(1.5rem*(1 - var(--tw-space-y-reverse)))}.overflow-hidden{overflow:hidden}.rounded-sm{border-radius:.125rem}.border-b{border-bottom-width:1px}.border-t-8{border-top-width:8px}.border-red-highlight{--tw-border-opacity:1;border-color:rgb(105 20 30/var(--tw-border-opacity,1))}.border-teal-500{--tw-border-opacity:1;border-color:rgb(41 118 118/var(--tw-border-opacity,1))}.border-b-red-midtone{--tw-border-opacity:1;border-bottom-color:rgb(160 15 40/var(--tw-border-opacity,1))}.bg-red-highlight{--tw-bg-opacity:1;background-color:rgb(105 20 30/var(--tw-bg-opacity,1))}.bg-red-shadow{--tw-bg-opacity:1;background-color:rgb(50 0 15/var(--tw-bg-opacity,1))}.bg-surface{--tw-bg-opacity:1;background-color:rgb(245 245 245/var(--tw-bg-opacity,1))}.bg-teal
sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML Yes
A+
Domain Intelligence
rs-online.com — via CSC Corporate Domains, Inc., 24 years, 9 months old, hosted on Akamai
PASS
rs-online.com — via CSC Corporate Domains, Inc., 24 years, 9 months old, hosted on Akamai
Info::
Domain registered until Nov 4, 2026 (6 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: CSC Corporate Domains, Inc.
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Info::
Hosting: Akamai
Got: AS16625
Domain expiry

141 days

November 4, 2026

SSL certificate

216 days

Issued by DigiCert Inc

Domain age

24 years, 9 months

Registered November 4, 2001

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Akamai

ASN AS16625

23.194.21.152

Registrar

CSC Corporate Domains, Inc.

Unlocked 6 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar CSC Corporate Domains, Inc.
Created November 4, 2001 (24 years, 9 months ago)
Expires November 4, 2026 (6 months)
Last Updated October 31, 2025
Name Servers a1-40.akam.net, a11-67.akam.net, a16-64.akam.net, a20-65.akam.net, a24-66.akam.net, a9-67.akam.net
DNSSEC Not enabled
Hosting
IP Address 23.194.21.152
ASN AS16625 (AKAMAI-AS - Akamai Technologies, Inc., US)
Provider Akamai
Data source: rdap (0.3s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 37 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
32 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.
37 ms
Total Time Total request time from DNS lookup through full response.
37 ms

Connection waterfall

DNS Lookup 32 ms TCP Connect 1 ms TLS Handshake 3 ms Server Processing 2 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.

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