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https://zeffy.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
94
GRADE
A
FIX
0
REVIEW
2
PASS
7
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
7 PASS 2 REVIEW
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.zeffy.com/
200https://zeffy.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://zeffy.com/ → https://zeffy.com/

Consistent

B
TLS Certificate Expiry & Recommendations
34 days until leaf cert expires — 2 issues to address
REVIEW

Certificate validity

34
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
2 A records, 5 ms lookup
PASS
2 A records, 5 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 104.18.20.101, 104.18.21.101
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700::6812:1465, 2606:4700::6812:1565
Info::
2 nameserver(s) configured
Got: melody.ns.cloudflare.com, vasilii.ns.cloudflare.com
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: 5 ms
Got: 5 ms
A104.18.20.101, 104.18.21.101
AAAA2606:4700::6812:1465, 2606:4700::6812:1565
CNAME—
NSmelody.ns.cloudflare.com, vasilii.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
10 alt4.aspmx.l.google.com
TXT
brevo-code:131de14dca15092eb61ee191e6206664
stytch_verification_dns=field-pressure-2888
openai-domain-verification=dv-BiBUUrrBDtsDOpwH8aJvG8HS
ps-cd-verification=6080babb-e994-4956-a8d1-aafa99270916
anthropic-domain-verification-ha5zzx=gV2Rr3PEj1L0LoBz3Kt0XhPRT
linkedin-site-verification=18ac1623-3c54-40dd-9136-24467c8d9c14
google-site-verification=rvRmftaYMiJYTC1gPBNIud-mAQC-hu1EBUfMaifLVfk
site24x7-signals-domain-verification=350435200c36d1fa74f0529f3a9e4fc8
hubspot-developer-verification=OTk0NzFhOTYtYzYwMi00ZGJiLTgyZmEtZmZkOGE1N2JhYTRi
SPF v=spf1 include:_spf.google.com include:2614165.spf03.hubspotemail.net include:mg...
CAALookup not available with standard resolver
Resolved in 5 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), 92 ms total
PASS
1 redirect(s), 92 ms total
Info::
Single redirect
Got: https://zeffy.com → https://www.zeffy.com (301)
Info::
WWW normalization redirect

https://zeffy.com

41 ms · HTTP/1.1

301

https://www.zeffy.com

52 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://zeffy.com30141 msHTTP/1.1cloudflare
2https://www.zeffy.com20052 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2606:4700::6812:1465, 2606:4700::6812:1565
Got: 1 ms connect
IPv6 Ready
AAAA Records 2606:4700::6812:1465, 2606:4700::6812:1565 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 443 URLs
PASS
robots.txt present, sitemap with 443 URLs
Info::
robots.txt is present
Got: 421 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 443 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 421 B Sitemaps referenced 6 User-agents * Blocking No — crawling allowed
# *
User-agent: *
Disallow: /*=$

# Host
Host: https://www.zeffy.com

# Sitemaps
Sitemap: https://www.zeffy.com/next-sitemap.xml
Sitemap: https://api.zeffy.com/sitemap/sitemap-index.xml
Sitemap: https://api.zeffy.com/sitemap/organizations/sitemap-index.xml
Sitemap: https://api.zeffy.com/sitemap/webflow/cms/sitemap-index.xml
Sitemap: https://grant-finder.zeffy.com/sitemap.xml
Sitemap: https://www.zeffy.com/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 443 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
zeffy.com — via Squarespace Domains II LLC, 21 years, 4 months old
PASS
zeffy.com — via Squarespace Domains II LLC, 21 years, 4 months old
Info::
Domain registered until Mar 16, 2027 (10 months remaining)
Info::
DNSSEC is enabled
Info::
Registrar: Squarespace Domains II LLC
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

274 days

March 16, 2027

SSL certificate

34 days

Issued by Google Trust Services

Domain age

21 years, 4 months

Registered March 16, 2005

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700::6812:1465

Registrar

Squarespace Domains II LLC

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar Squarespace Domains II LLC
Created March 16, 2005 (21 years, 4 months ago)
Expires March 16, 2027 (10 months)
Last Updated March 1, 2026
Name Servers melody.ns.cloudflare.com, vasilii.ns.cloudflare.com
DNSSEC Enabled
Hosting
IP Address 2606:4700::6812:1465
Data source: rdap (0.6s)

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 250 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.
1 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.
251 ms
Total Time Total request time from DNS lookup through full response.
251 ms

Connection waterfall

DNS Lookup 4 ms TCP Connect 1 ms TLS Handshake 10 ms Server Processing 236 ms Content Transfer 0 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: SIN)
Got: cf-ray: 9f0731ee2ba68207-SIN
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: 9f0731ee2ba68207-SIN
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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