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https://linkr.sh

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
82
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Santa Clara, United States
307 Temporary Redirect
Checks
9
5 PASS 3 REVIEW 1 FIX
F
IPv6 Readiness
Action
IPv6 records exist but unreachable
FIX
IPv6 records exist but unreachable
Warning::
IPv6 DNS records exist but server is not reachable
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Got: 2606:4700:3032::6815:292d, 2606:4700:3034::ac43:9ff5
Info::
IPv6 connection error
Got: dial tcp6 [2606:4700:3032::6815:292d]:443: connect: network is unreachable
IPv6 Misconfigured
AAAA Records 2606:4700:3032::6815:292d, 2606:4700:3034::ac43:9ff5 Connection UNREACHABLE

Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.

Why this matters

Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.

Learn more ▾

Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.

Source: RFC 8305 (Happy Eyeballs)

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
HTTP version does not redirect to HTTPS
Got: HTTP 307 Expected: 301 redirect to HTTPS

www / non-www

https://www.linkr.sh/
200https://linkr.sh/

HTTP → HTTPS

307http://linkr.sh/ → http://linkr.sh/en

HTTP version does not redirect to HTTPS

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

Certificate validity

74
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
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: SJC)
Got: cf-ray: 9e91b19a48cfd8c2-SJC
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9e91b19a48cfd8c2-SJC
A+
DNS Records
2 A records, 33 ms lookup
PASS
2 A records, 33 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.67.159.245, 104.21.41.45
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:3032::6815:292d, 2606:4700:3034::ac43:9ff5
Info::
2 nameserver(s) configured
Got: dell.ns.cloudflare.com, nile.ns.cloudflare.com
Info::
3 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
Info::
DNS resolution time: 33 ms
Got: 33 ms
A172.67.159.245, 104.21.41.45
AAAA2606:4700:3032::6815:292d, 2606:4700:3034::ac43:9ff5
CNAME—
NSdell.ns.cloudflare.com, nile.ns.cloudflare.com
MX
2 route1.mx.cloudflare.net
56 route2.mx.cloudflare.net
82 route3.mx.cloudflare.net
TXT
google-site-verification=uuQeGYJExUm2v7e0LE581bx6JbudeJ87X9g9ESApWiM
SPF v=spf1 include:_spf.mx.cloudflare.net ~all
CAALookup not available with standard resolver
Resolved in 33 ms

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), 340 ms total
PASS
1 redirect(s), 340 ms total
Info::
Single redirect
Got: https://linkr.sh → https://linkr.sh/en (307)

https://linkr.sh

217 ms · HTTP/1.1

307

https://linkr.sh/en

124 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://linkr.sh307217 msHTTP/1.1cloudflare
2https://linkr.sh/en200124 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 45 URLs
PASS
robots.txt present, sitemap with 45 URLs
Info::
robots.txt is present
Got: 85 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 45 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 85 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-Agent: *
Allow: /

Sitemap: https://linkr.sh/sitemap.xml
Host: https://linkr.sh
sitemap.xml 200 OK
Type URL Set URLs 45 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
linkr.sh — via NameCheap, Inc., 6 months old, hosted on Cloudflare
PASS
linkr.sh — via NameCheap, Inc., 6 months old, hosted on Cloudflare
Info::
Domain registered until Sep 14, 2026 (5 months remaining)
Info::
Registrar: NameCheap, Inc.
Info::
Hosting: Cloudflare
Got: AS13335
Domain expiry

64 days

September 14, 2026

SSL certificate

74 days

Issued by Google Trust Services

Domain age

6 months

Registered September 14, 2025

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS13335

104.21.41.45

Registrar

NameCheap, Inc.

Lock status unknown 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the domain or enable auto-renewal to prevent accidental expiry
Registrar NameCheap, Inc.
Created September 14, 2025 (6 months ago)
Expires September 14, 2026 (5 months)
Last Updated September 19, 2025
Name Servers nile.ns.cloudflare.com, dell.ns.cloudflare.com
Registrant Privacy service provided by Withheld for Privacy ehf
Hosting
IP Address 104.21.41.45
ASN AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
Provider Cloudflare
Data source: whois (0.4s)
A+
HTTP Probe Timing
Total 275 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
29 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
4 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
10 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
276 ms
Total Time Total request time from DNS lookup through full response.
276 ms

Connection waterfall

DNS Lookup 29 ms TCP Connect 4 ms TLS Handshake 10 ms Server Processing 232 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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