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https://linear.app

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
100
GRADE
A+
FIX
0
REVIEW
1
PASS
8
INFO
0
Probed from Amsterdam, Netherlands
200 OK
Checks
9
8 PASS 1 REVIEW
B
TLS Certificate Expiry & Recommendations
77 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

77
days left
0d 30d 60d 90d+

Recommended actions

  • 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
2 A records, 21 ms lookup
PASS
2 A records, 21 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.64.147.211, 104.18.40.45
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2a06:98c1:3100::6812:282d, 2606:4700:4400::ac40:93d3
Info::
2 nameserver(s) configured
Got: tim.ns.cloudflare.com, zara.ns.cloudflare.com
Info::
4 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: 21 ms
Got: 21 ms
A172.64.147.211, 104.18.40.45
AAAA2a06:98c1:3100::6812:282d, 2606:4700:4400::ac40:93d3
CNAME—
NStim.ns.cloudflare.com, zara.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 alt3.aspmx.l.google.com
TXT
v=MCPv1; k=ed25519; p=kK/pbugEO5TjSy0dXhqbUMJ0v+5eCO8osDkDeccICp4=
linear-domain-verification=391958
google-site-verification=mFdMlamOogHV4U7WGNYRd55OvljoEx7M_wgpb7zHzfo
rippling-domain-verification=806196fd264819a7
slack-domain-verification=n9BI0EJf0vSJO9ugqYmWNJ5xbOOVQnnTirCGbRZK
domain-verification=0b7a143e64a100eeb18d7e29c53d3bcf83746f87607ac1f1b6aef8802ad5...
ZOOM_verify_rSExBwd4QT2vT9dfq9-UrA
SPF v=spf1 include:_spf.google.com include:spf.mtasv.net include:44092442.spf10.hubs...
docusign=9bc6c7a7-fde1-48af-bcc3-11f14e980549
google-site-verification=4am7F1KUGPoMFePO3xuz4Eek80WH7im3c9UeedE10pA
_qcd9zztuukbep051izx2pjssdl6yae2
launchdarkly-domain-verification=f702791b-ddb9-496f-80f1-df7499632973
mongodb-site-verification=DkQRVTZWWUX0i14d4YZddicK0SF4Qc1L
google-site-verification=-TwiLtawzz8QlL_LZlkuGibc6klzAuD0DfgytD0TM0g
openai-domain-verification=dv-cF94uxiJMGTKa374p6jJD0zU
notion-domain-verification=YflTDyf5nncjFK4D85Nsh38ufawi0ExsoOTUzXu9NpT
apple-domain-verification=zVdJnsxkD6nX5XCL
notion-domain-verification=WyZnKX70mlPP1r1HchqL7re1MjaYo5c2F2Cy2R2z3XD
MS=ms43041516
stripe-verification=6EC2FC42DC487CF290EEEE12F5DEE9914E0186EF7BF33C1B6AEB7DD8B643...
cursor-domain-verification-jkgerh=fYGswH2He0dJj0DekVjoNvFKi
anthropic-domain-verification-7emk8z=c8SuvlXPqgxzVcvjsiQ00cLfO
CAALookup not available with standard resolver
Resolved in 21 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
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://linear.app

https://linear.app

376 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://linear.app200376 msHTTP/1.1cloudflare
A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a06:98c1:3100::6812:282d, 2606:4700:4400::ac40:93d3
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a06:98c1:3100::6812:282d, 2606:4700:4400::ac40:93d3 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 830 URLs
PASS
robots.txt present, sitemap with 830 URLs
Info::
robots.txt is present
Got: 107 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 830 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 107 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-Agent: *
Disallow: /api/
Disallow: /cdn-cgi/
Allow: /api/og/

Sitemap: https://linear.app/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 830 entries Valid XML Yes
Sample URLs:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.linear.app/
200https://linear.app/

Preferred variant: non-www

HTTP → HTTPS

301http://linear.app/ → https://linear.app/

Consistent

A+
Domain Intelligence
linear.app — via CloudFlare, Inc., 8 years old
PASS
linear.app — via CloudFlare, Inc., 8 years old
Info::
Domain registered until May 9, 2030 (4 years, 1 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: CloudFlare, Inc.
Domain expiry

1398 days

May 9, 2030

SSL certificate

77 days

Issued by Google Trust Services

Domain age

8 years

Registered May 9, 2018

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2a06:98c1:3100::6812:282d

Registrar

CloudFlare, Inc.

Lock status unknown 2 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
Registrar CloudFlare, Inc.
Created May 9, 2018 (8 years ago)
Expires May 9, 2030 (4 years, 1 months)
Last Updated March 9, 2026
Name Servers tim.ns.cloudflare.com, zara.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 2a06:98c1:3100::6812:282d
Data source: rdap (0.6s)

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

A+
HTTP Probe Timing
Total 359 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.
2 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
11 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
309 ms
Total Time Total request time from DNS lookup through full response.
360 ms

Connection waterfall

DNS Lookup 4 ms TCP Connect 2 ms TLS Handshake 11 ms Server Processing 292 ms Content Transfer 50 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: AMS)
Got: cf-ray: 9e7192cf8ca39713-AMS
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: 9e7192cf8ca39713-AMS
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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