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https://uspto.gov

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
94
GRADE
A
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
6 PASS 3 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.uspto.gov/
200https://uspto.gov/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://uspto.gov/ → https://www.uspto.gov/

Consistent

C
TLS Certificate Expiry & Recommendations
Action
22 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

22
days left
0d 30d 60d 90d+
Renew soon — under 30 days remaining

Recommended actions

  • Renew certificate — 22 days remaining
  • 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
B
CDN & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: SIN)
Got: cf-ray: 9efed05d79f32c14-SIN
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9efed05d79f32c14-SIN
A+
DNS Records
2 A records, 13 ms lookup
PASS
2 A records, 13 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 104.18.35.192, 172.64.152.64
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2a06:98c1:3103::6812:23c0, 2a06:98c1:3107::ac40:9840
Info::
3 nameserver(s) configured
Got: gold.foundationdns.com, gold.foundationdns.net, gold.foundationdns.org
Info::
1 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: 13 ms
Got: 13 ms
A104.18.35.192, 172.64.152.64
AAAA2a06:98c1:3103::6812:23c0, 2a06:98c1:3107::ac40:9840
CNAME—
NSgold.foundationdns.com, gold.foundationdns.net, gold.foundationdns.org
MX
5 uspto-gov.mail.protection.outlook.com
TXT
MS=ms28666523
_qf2w9oo2ieh425rh0b6gjpp829vih2b
apple-domain-verification=DQ6lsHErU2gvVyqF
jetbrains-domain-verification=8sj6e0d8s6q4fvu86jcfzp0g5
facebook-domain-verification=6wqv4rmxkothypv5gij5080967l5ws
ms-domain-verification=725c3c35-24ef-43fd-a26b-2736d7cea1a6
perplexity-ai-domain-verification-7tdkgd=M7VyHULqPpVV3g4SsM4BNc1mR
webexdomainverification.7PUPU=2a587b5a-c181-4a6c-9d10-a13dcaa747bd
google-site-verification=5eOb2YylR8fDTIkmIs3N0CaJ_IHjjikNS-Z7BDb9jvw
google-site-verification=MB6vnwbxkyN6STcgBAa5U-W1H7VhU62fSuT95KrWhlk
3FKeZ5CH9TEaLgiiioa9/iDVB0WPJofaHBuumk1YRmcuggWFX3v3gDlSw5uSIbaSuvm/FsOYPRzhM87B...
SnTiaz2QHOuDsjncHy2wc6dZmnzEFxbqKLWgzzrfBidPblmIGRxS9jP28Zb4xPjhhlE2YBm98Mu+Dhbx...
adobe-idp-site-verification=fd06710ade06e49a5be3b877d16463b3f5f050a1e54eaaa1daff...
SPF v=spf1 include:uspto.gov._nspf.valigov.email include:%{i}._ip.%{h}._ehlo.%{d}._s...
CAALookup not available with standard resolver
Resolved in 13 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), 598 ms total
PASS
1 redirect(s), 598 ms total
Info::
Single redirect
Got: https://uspto.gov → https://www.uspto.gov/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 598 ms total
Got: 598 ms

https://uspto.gov

15 ms · HTTP/1.1

301

https://www.uspto.gov/

583 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://uspto.gov30115 msHTTP/1.1cloudflare
2https://www.uspto.gov/200583 msHTTP/1.1Apache

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 2a06:98c1:3103::6812:23c0, 2a06:98c1:3107::ac40:9840
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a06:98c1:3103::6812:23c0, 2a06:98c1:3107::ac40:9840 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 3 URLs
PASS
robots.txt present, sitemap with 3 URLs
Info::
robots.txt is present
Got: 356 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 3 entries
Info::
Sitemap index with 3 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 356 B Sitemaps referenced 4 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /cgi-bin/
Disallow: /includes/
Disallow: /cybertraining/
Disallow: /ebc/portal/
Disallow: /images/

Sitemap: https://www.uspto.gov/sitemap.xml
Sitemap: https://foiadocuments.uspto.gov/foia_sitemap.xml
Sitemap: https://ipidentifier.uspto.gov/ipidentifier_sitemap.xml
Sitemap: https://www.uspto.gov/officialgazette/og_sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 3 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
uspto.gov — via get.gov, 28 years, 11 months old
PASS
uspto.gov — via get.gov, 28 years, 11 months old
Info::
Domain registered until Aug 1, 2026 (3 months remaining)
Info::
DNSSEC is enabled
Info::
Registrar: get.gov
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

17 days

August 1, 2026

SSL certificate

22 days

Issued by Google Trust Services

Domain age

28 years, 11 months

Registered October 2, 1997

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2a06:98c1:3103::6812:23c0

Registrar

get.gov

Unlocked 3 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
  • Renew the TLS certificate or verify auto-renewal is working
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar get.gov
Created October 2, 1997 (28 years, 11 months ago)
Expires August 1, 2026 (3 months)
Last Updated August 6, 2025
Name Servers gold.foundationdns.com, gold.foundationdns.net, gold.foundationdns.org
DNSSEC Enabled
Registrant REDACTED FOR PRIVACY
Hosting
IP Address 2a06:98c1:3103::6812:23c0
Data source: rdap (0.4s)

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 15 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
5 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.
7 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
15 ms
Total Time Total request time from DNS lookup through full response.
16 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 1 ms TLS Handshake 7 ms Server Processing 3 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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