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https://sched.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Singapore, Singapore
200 OK
Checks
9
6 PASS 3 REVIEW
B
HTTP Probe Timing
Total 1152 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
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.
8 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
926 ms
Total Time Total request time from DNS lookup through full response.
1.15 s

Connection waterfall

DNS Lookup 4 ms TCP Connect 1 ms TLS Handshake 8 ms Server Processing 913 ms Content Transfer 226 ms
C
TLS Certificate Expiry & Recommendations
Action
28 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

28
days left
0d 30d 60d 90d+
Renew soon — under 30 days remaining

Recommended actions

  • Renew certificate — 28 days remaining
  • Submit your domain to hstspreload.org to be added to the Chrome preload list
  • 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 (BYPASS)
REVIEW
Cloudflare (BYPASS)
Info::
Site is served via Cloudflare CDN (edge: SIN)
Got: cf-ray: 9f088f6aefd73fcc-SIN
Info::
CDN cache status: BYPASS
CDN Detected: Cloudflare
Provider Cloudflare Cache Status BYPASS Evidence cf-ray: 9f088f6aefd73fcc-SIN
A+
DNS Records
2 A records, 179 ms lookup
PASS
2 A records, 179 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 104.20.32.154, 172.66.162.33
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:10::6814:209a, 2606:4700:10::ac42:a221
Info::
4 nameserver(s) configured
Got: ns3.sched.net, ns2.sched.net, ns1.sched.net, ns4.sched.net
Info::
5 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: 179 ms
Got: 179 ms
A104.20.32.154, 172.66.162.33
AAAA2606:4700:10::6814:209a, 2606:4700:10::ac42:a221
CNAME
NSns3.sched.net, ns2.sched.net, ns1.sched.net, ns4.sched.net
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 aspmx2.googlemail.com
10 aspmx3.googlemail.com
TXT
google-site-verification=j1h4YHvMgeizRKNusol0tdQnwP7Qt2nHsScUeiWmJJc
MS=ms81222115
SPF v=spf1 a mx include:spf.recurly.com include:email.chargebee.com include:servers....
unbounce716033
google-site-verification=7qMhhNhdr3bGWEA6OeGW6R8sXDdWjdkv__UEAXbrrnU
stripe-verification=d1fd4aa8c74dce814dda4aebbb7abb10d7e68207321dd0ceac3daf05429f...
google-site-verification=SkZzukpNg4F1ccG0VAMqKXwKbISFLNmJmRdT4_q8Hgw
google-site-verification=3kIWIvNZI9GSZyiq8b4WQnQCMi1LmEUvm39xL7XLkUI
google-site-verification=MI8j6UVFyVaezC1bGtKE1gccG3SLB6EXKRVyXo7Ua3g
CAALookup not available with standard resolver
Resolved in 179 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://sched.com

https://sched.com

843 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://sched.com200843 msHTTP/1.1cloudflare
A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2606:4700:10::6814:209a, 2606:4700:10::ac42:a221
Got: 1 ms connect
IPv6 Ready
AAAA Records 2606:4700:10::6814:209a, 2606:4700:10::ac42:a221 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 15 URLs
PASS
robots.txt present, sitemap with 15 URLs
Info::
robots.txt is present
Got: 58 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 15 entries
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

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 58 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed
User-Agent: *
Disallow: /maintenance
Disallow: /ticketapi

sitemap.xml 200 OK
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)
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

301https://www.sched.com/
200https://sched.com/

Preferred variant: non-www

HTTP → HTTPS

302http://sched.com/ https://sched.com/

Use 301 (permanent) instead of 302 (temporary)

A+
Domain Intelligence
sched.com — via NameCheap, Inc., 24 years, 9 months old
PASS
sched.com — via NameCheap, Inc., 24 years, 9 months old
Info::
Domain registered until Nov 14, 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: NameCheap, 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.
Domain expiry

151 days

November 14, 2026

SSL certificate

28 days

Issued by Google Trust Services

Domain age

24 years, 9 months

Registered November 14, 2001

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:10::6814:209a

Registrar

NameCheap, Inc.

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the TLS certificate or verify auto-renewal is working
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar NameCheap, Inc.
Created November 14, 2001 (24 years, 9 months ago)
Expires November 14, 2026 (6 months)
Last Updated December 26, 2025
Name Servers ns1.sched.net, ns2.sched.net, ns3.sched.net, ns4.sched.net
DNSSEC Not enabled
Hosting
IP Address 2606:4700:10::6814:209a
Data source: rdap (0.7s)

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

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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