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https://uschamber.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
87
GRADE
B
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Santa Clara, United States
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

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.uschamber.com/
200https://uschamber.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://uschamber.com/ → https://www.uschamber.com/

Consistent

B
TLS Certificate Expiry & Recommendations
42 days until leaf cert expires — 5 issues to address
REVIEW

Certificate validity

42
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • Add includeSubDomains to the HSTS directive
  • 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
4 A records, 18 ms lookup
PASS
4 A records, 18 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 151.101.2.133, 151.101.130.133, 151.101.194.133, 151.101.66.133
Info::
No IPv6 (AAAA) records
Info::
6 nameserver(s) configured
Got: pdns72.ultradns.co.uk, pdns72.ultradns.biz, pdns72.ultradns.com, pdns72.ultradns.net, pdns72.ultradns.org, pdns72.ultradns.info
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: 18 ms
Got: 18 ms
A151.101.2.133, 151.101.130.133, 151.101.194.133, 151.101.66.133
AAAA—
CNAME—
NSpdns72.ultradns.co.uk, pdns72.ultradns.biz, pdns72.ultradns.com, pdns72.ultradns.net, pdns72.ultradns.org, pdns72.ultradns.info
MX
100 mxb-00109201.gslb.pphosted.com
100 mxa-00109201.gslb.pphosted.com
200 mx0b-00109201.pphosted.com
200 mx0a-00109201.pphosted.com
TXT
MS=ms14420005
00D5A0000015yWT=1TBPo00000001ov
asv=97249c026f2a209b44d1b61fe9644e11
dropbox-domain-verification=a7k5mtt66gcm
apple-domain-verification=sE02ErxddNO9H7W2
MS=8FDF2F37967C2F2A36067E4626EAE658D2288A7F
jamf-site-verification=ZfwFKEjjxe2oSUSrIRJzIw
facebook-domain-verification=8m50q4bwlkjwwxhjmhdxzbm1856phr
anthropic-domain-verification-b9nxmx=cdFOIuXYEFUZrS3SV2JxyVjF1
calendly-site-verification=OH3lMdyQH4dBuU6s4XrCPSvtIveyUM8JnahhlTiVF
google-site-verification=2jzYML6oxM9ZBCS4_WItyQJAFVPSyKqekZA_MXEJTqI
google-site-verification=X330USjfikKZ6LK3pSwYV7pHdK1qDWNp9Mc39pnBVN8
google-site-verification=cpAB_W51yD3EtBJY8ZjeUuy1dPJf_Wx97-Kz2MCr6hQ
google-site-verification=q2FCUeF0aVRACDJ6yLZCmEmZTZxLP4et16IfLUpTRgc
google-site-verification=w6_zuRntK7uFgegMErxtAM0NrTt1GiaF6cucxgfvWOY
_globalsign-domain-verification=p1fktqCHnOA1sE262wg61RlM1M1TddxeBhTTQfKOf-
JkzgbDnhpvfvwUqQWhR1G/C6qMnxBF9tD7MgXjIxc1wZh9PrfZuFGaZQbnYjKG/LLI3F0h/PNxJ/69fT...
atlassian-domain-verification=NGXfpzqXmD3SRA9Zh45a5t20H5bnrxp1bjcXAsYZrfw9iI8ZBx...
SPF v=spf1 ip4:209.3.198.0/24 ip4:38.104.236.218 ip4:216.200.160.161/28 ip4:216.185....
CAALookup not available with standard resolver
Resolved in 18 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), 261 ms total
PASS
1 redirect(s), 261 ms total
Info::
Single redirect
Got: https://uschamber.com → https://www.uschamber.com/ (301)
Info::
WWW normalization redirect

https://uschamber.com

19 ms · HTTP/1.1

301

https://www.uschamber.com/

242 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://uschamber.com30119 msHTTP/1.1Varnish
2https://www.uschamber.com/200242 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 21 URLs
PASS
robots.txt present, sitemap with 21 URLs
Info::
robots.txt is present
Got: 525 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 21 entries
Info::
Sitemap index with 21 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 525 B Sitemaps referenced 5 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /.env
Disallow: /cpresources/
Disallow: /imager/
Disallow: /index.php/actions/
Disallow: /cases/search
Disallow: /cases/search/
Sitemap: https://www.uschamber.com/sitemap.xml
Disallow: /co/.env
Disallow: /co/cpresources/
Disallow: /co/index.php/actions/
Sitemap: https://www.uschamber.com/co/sitemap.xml
Sitemap: https://www.uschamber.com/co/sitemap/chamber-directory
Sitemap: https://www.uschamber.com/co/sitemap/chamber-directory/states-sitemaps
Sitemap: https://www.uschamber.com/co/sitemap/authors
sitemap.xml 200 OK
Type Sitemap Index URLs 21 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
uschamber.com — via CSC Corporate Domains, Inc., 30 years, 6 months old, hosted on Fastly
PASS
uschamber.com — via CSC Corporate Domains, Inc., 30 years, 6 months old, hosted on Fastly
Info::
Domain registered until Mar 28, 2027 (11 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: CSC Corporate Domains, 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.
Info::
Hosting: Fastly
Got: AS54113
Domain expiry

287 days

March 28, 2027

SSL certificate

42 days

Issued by Let's Encrypt

Domain age

30 years, 6 months

Registered March 27, 1996

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

151.101.66.133

Registrar

CSC Corporate Domains, Inc.

Unlocked 6 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
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar CSC Corporate Domains, Inc.
Created March 27, 1996 (30 years, 6 months ago)
Expires March 28, 2027 (11 months)
Last Updated March 24, 2026
Name Servers pdns72.ultradns.biz, pdns72.ultradns.co.uk, pdns72.ultradns.com, pdns72.ultradns.info, pdns72.ultradns.net, pdns72.ultradns.org
DNSSEC Not enabled
Hosting
IP Address 151.101.66.133
ASN AS54113 (FASTLY - Fastly, Inc., US)
Provider Fastly
Data source: rdap (0.2s)

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

A+
HTTP Probe Timing
Total 21 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
6 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
3 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.
21 ms
Total Time Total request time from DNS lookup through full response.
21 ms

Connection waterfall

DNS Lookup 6 ms TCP Connect 3 ms TLS Handshake 8 ms Server Processing 4 ms Content Transfer 0 ms
A+
CDN & Delivery
Fastly (HIT)
PASS
Fastly (HIT)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-sjc10041-SJC
Info::
CDN cache status: HIT
CDN Detected: Fastly
Provider Fastly Cache Status HIT Evidence x-served-by: cache-sjc10041-SJC
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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