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https://vocabulary.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 Madrid, Spain
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.vocabulary.com/
200https://vocabulary.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

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

Consistent

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

Certificate validity

44
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, 39 ms lookup
PASS
2 A records, 39 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.64.147.25, 104.18.40.231
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2a06:98c1:3106::6812:28e7, 2a06:98c1:3107::ac40:9319
Info::
2 nameserver(s) configured
Got: chuck.ns.cloudflare.com, cora.ns.cloudflare.com
Info::
2 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: 39 ms
Got: 39 ms
A172.64.147.25, 104.18.40.231
AAAA2a06:98c1:3106::6812:28e7, 2a06:98c1:3107::ac40:9319
CNAME—
NSchuck.ns.cloudflare.com, cora.ns.cloudflare.com
MX
10 mxa.global.inbound.cf-emailsecurity.net
20 mxb.global.inbound.cf-emailsecurity.net
TXT
google-site-verification=bqqiNjkwoU5lU0h9UMyIYjxjwLClsGQZwMwVDMs2OfY
ZOOM_verify_2GWN8mD8REWUw07rzqw7iQ
google-site-verification=SeTFrZRrDnl8BPLvbH9Wf6KaYv6AxUWOMXwP_10NWAw
MS=ms95483959
google-site-verification=y5mf0F_6JvLAq-JqycujEJ_7lcspieY7bIiSfzv1Z64
google-site-verification=scSUnpy_6b1Dzy9u_FYykTkzTtXnY8kyQkhaVb7l7OA
SPF v=spf1 redirect=vocabulary.com.hosted.spf-report.com
ca3-dcb65ebb6f6646a0ba77c3e4366c434a
google-site-verification=6If6n5Hgvo0IRFxpmqOWrr0rEmtTyJQQ_1UIMhp9jy0
apple-domain-verification=AiE7A1mMhBWYKKG_QNfXse2Gx1jS55vv2Xa1AlauCb4
CAALookup not available with standard resolver
Resolved in 39 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), 551 ms total
PASS
1 redirect(s), 551 ms total
Info::
Single redirect
Got: https://vocabulary.com → https://www.vocabulary.com/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 551 ms total
Got: 551 ms

https://vocabulary.com

350 ms · HTTP/1.1

301

https://www.vocabulary.com/

201 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://vocabulary.com301350 msHTTP/1.1cloudflare
2https://www.vocabulary.com/200201 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2a06:98c1:3106::6812:28e7, 2a06:98c1:3107::ac40:9319
Got: 17 ms connect
IPv6 Ready
AAAA Records 2a06:98c1:3106::6812:28e7, 2a06:98c1:3107::ac40:9319 Connection Reachable (17 ms)
A+
Crawlability
robots.txt present, sitemap with 57 URLs
PASS
robots.txt present, sitemap with 57 URLs
Info::
robots.txt is present
Got: 321 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 57 entries
Info::
Sitemap index with 57 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 321 B Sitemaps referenced 1 User-agents *, GPTBot, CCBot, Applebot-Extended Blocking No — crawling allowed
User-agent: *

Disallow: /account/

Disallow: /ui/

Disallow: /auth/

Disallow: /challenge/

Disallow: /login/

Disallow: /signup/

Disallow: /join/


User-agent: GPTBot

Disallow: /


User-agent: CCBot

Disallow: /


User-agent: Applebot-Extended

Disallow: /


Sitemap: https://www.vocabulary.com/sitemaps/index.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 57 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
vocabulary.com — via 101domain GRS Limited, 30 years old
PASS
vocabulary.com — via 101domain GRS Limited, 30 years old
Info::
Domain registered until Sep 17, 2026 (4 months remaining)
Info::
DNSSEC is enabled
Info::
Registrar: 101domain GRS Limited
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

93 days

September 17, 2026

SSL certificate

44 days

Issued by Let's Encrypt

Domain age

30 years

Registered September 18, 1996

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2a06:98c1:3107::ac40:9319

Registrar

101domain GRS Limited

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 101domain GRS Limited
Created September 18, 1996 (30 years ago)
Expires September 17, 2026 (4 months)
Last Updated October 14, 2025
Name Servers chuck.ns.cloudflare.com, cora.ns.cloudflare.com
DNSSEC Enabled
Hosting
IP Address 2a06:98c1:3107::ac40:9319
Data source: rdap (0.1s)

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 401 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
48 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
16 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
23 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
401 ms
Total Time Total request time from DNS lookup through full response.
401 ms

Connection waterfall

DNS Lookup 48 ms TCP Connect 16 ms TLS Handshake 23 ms Server Processing 313 ms Content Transfer 0 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9f07406b9f046f1e-CDG
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: 9f07406b9f046f1e-CDG
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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