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https://census.gov

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
86
GRADE
B
FIX
1
REVIEW
4
PASS
4
INFO
0
Probed from Madrid, Spain
302 Found
Checks
9
4 PASS 4 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
Redirect Chain
1 redirect(s), 1405 ms total
REVIEW
1 redirect(s), 1405 ms total
Info::
Single redirect
Got: https://census.gov → https://www.census.gov/ (302)
Info::
WWW normalization redirect
Info::
Uses 302 (temporary) redirect
If permanent, use 301 instead.
Got: https://census.gov
Warning::
Redirect overhead: 1405 ms total
Got: 1405 ms

https://census.gov

960 ms · HTTP/1.0

302

https://www.census.gov/

446 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://census.gov302960 msHTTP/1.0
2https://www.census.gov/200446 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

If permanent, use 301 instead.

Why this matters

302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.

Learn more

Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).

Source: Google Search Central

C
URL Variants
Action
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
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

200https://www.census.gov/
200https://census.gov/

Inconsistent — duplicate content risk

HTTP → HTTPS

302http://census.gov/ https://www.census.gov/

Use 301 (permanent) instead of 302 (temporary)

B
HTTP Probe Timing
Total 1084 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
107 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
104 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
770 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
1.08 s
Total Time Total request time from DNS lookup through full response.
1.08 s

Connection waterfall

DNS Lookup 107 ms TCP Connect 104 ms TLS Handshake 770 ms Server Processing 104 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
157 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

157
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
  • 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
1 A records, 278 ms lookup
PASS
1 A records, 278 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 148.129.75.166
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2610:20:2010:a05:1000:0:9481:4ba6
Info::
2 nameserver(s) configured
Got: ns1e.census.gov, ns2e.census.gov
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
Warning::
DNS resolution is slow (278 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 278 ms
A148.129.75.166
AAAA2610:20:2010:a05:1000:0:9481:4ba6
CNAME
NSns1e.census.gov, ns2e.census.gov
MX
50 mail1.census.gov
50 mail2.census.gov
TXT
adobe-idp-site-verification=c75e766ae664774cb9d671205f69ba1bbb97fbacb49c55d78725...
apple-domain-verification=2jIC5VNEsj8bPdnu
google-site-verification=5gdefaxvKpVMBIGemF2Dw4yBrtDazSNnprwC3sLsrUE
SPF v=spf1 ip4:148.129.0.0/16 ip6:2610:20:2000:101::f:0 ip6:2610:20:2010:a04::f:0 mx...
google-site-verification=OMpp6MyQ1bAbnGclpbKqCMZal_1HxJapzG2tSRWFbzI
+i27enlfMpLlk9UWn4Ku+sUy3QO5Lnbysj+2rdvlyfPtq28iCTuH3b9ZnVWcYbhtrY1f1H9xsXT74U75...
infoblox-domain-mastery=578e129560f03adc81a7b3f658065459be516b52709d8fde2b1183b7...
MS=ms38105103
google-site-verification=KnpcXkPcji6vLLd7Scev-xZMllMdI8f75Ibi--S4lzI
apple-domain-verification=A8NwvlnLg7Cm2H3G
airtable-verification=3602865d8095935581ec510122a7f819
CAALookup not available with standard resolver
Resolved in 278 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

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.

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

A+
IPv6 Readiness
IPv6 reachable (104 ms)
PASS
IPv6 reachable (104 ms)
Info::
IPv6 is configured and reachable at 2610:20:2010:a05:1000:0:9481:4ba6
Got: 104 ms connect
IPv6 Ready
AAAA Records 2610:20:2010:a05:1000:0:9481:4ba6 Connection Reachable (104 ms)
A+
Crawlability
robots.txt present, sitemap with 14 URLs
PASS
robots.txt present, sitemap with 14 URLs
Info::
robots.txt is present
Got: 1162 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 14 entries
Info::
Sitemap index with 14 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1162 B Sitemaps referenced 1 User-agents Yahoo! Slurp, bingbot, usasearch, *, W3C-checklink, Googlebot Blocking No — crawling allowed
User-agent: *
Disallow: /search-results.html

User-agent: W3C-checklink
Disallow: /cgi-bin/
Disallow: /libs/
Disallow: /tmp/
Disallow: /etc/

Disallow: /about/adrm/data-linkage/
allow: /etc.clientlibs/census/clientlibs
allow: /etc/clientlibs/granite
allow: /etc/clientlibs/foundation

User-agent: Googlebot
Crawl-delay: 15
Disallow: /cgi-bin/
Disallow: /libs/
Disallow: /tmp/
Disallow: /etc/

Disallow: /about/adrm/data-linkage/
allow: /etc.clientlibs/census/clientlibs
allow: /etc/clientlibs/granite
allow: /etc/clientlibs/foundation


User-agent: Yahoo! Slurp
Crawl-delay: 3
Disallow: /cgi-bin/
Disallow: /libs/
Disallow: /tmp/
Disallow: /etc/

Disallow: /about/adrm/data-linkage/
allow: /etc.clientlibs/census/clientlibs
allow: /etc/clientlibs/granite
allow: /etc/clientlibs/foundation

User-agent: bingbot
Crawl-delay: 3
Disallow: /cgi-bin/
Disallow: /libs/
Disallow: /tmp/
Disallow: /etc/

Disallow: /about/adrm/data-linkage/
allow: /etc.clientlibs/census/clientlibs
allow: /etc/clientlibs/granite
allow: /etc/clientlibs/foundation

User-agent: usasearch
Disallow: /quickfacts/
Noindex: /quickfacts/

SITEMAP: https://www.census.gov/sitemapindex/sitemap.xml
A+
Domain Intelligence
census.gov — via get.gov, 28 years, 11 months old
PASS
census.gov — via get.gov, 28 years, 11 months old
Info::
Domain registered until Sep 2, 2026 (4 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

79 days

September 2, 2026

SSL certificate

157 days

Issued by DigiCert Inc

Domain age

28 years, 11 months

Registered October 2, 1997

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2610:20:2010:a05:1000:0:9481:4ba6

Registrar

get.gov

Unlocked 2 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
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar get.gov
Created October 2, 1997 (28 years, 11 months ago)
Expires September 2, 2026 (4 months)
Last Updated February 12, 2026
Name Servers ns1e.census.gov, ns2e.census.gov
DNSSEC Enabled
Registrant REDACTED FOR PRIVACY
Hosting
IP Address 2610:20:2010:a05:1000:0:9481:4ba6
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

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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