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https://american.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
85
GRADE
B
FIX
0
REVIEW
4
PASS
5
INFO
0
Probed from Madrid, Spain
403 Forbidden
Checks
9
5 PASS 4 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.american.edu/
200https://american.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://american.edu/ → https://american.edu/

Consistent

B
TLS Certificate Expiry & Recommendations
138 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

138
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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
B
CDN & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9f00202cab9ad14e-CDG
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9f00202cab9ad14e-CDG
A
DNS Records
2 A records, 270 ms lookup
PASS
2 A records, 270 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.66.167.252, 104.20.42.212
Info::
No IPv6 (AAAA) records
Info::
3 nameserver(s) configured
Got: ns02.american.edu, ns01.american.edu, ns03.american.edu
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
Warning::
DNS resolution is slow (270 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 270 ms
A172.66.167.252, 104.20.42.212
AAAA—
CNAME—
NSns02.american.edu, ns01.american.edu, ns03.american.edu
MX
0 american-edu.mail.protection.outlook.com
TXT
airtable-verification=6924fd85564c50d9a25725353a4c9682
IvBHcy93qusUpxOAEbsczNOF40HDNML4pZ1BtXp4SzM=
icln8ljp743s7hkfgsnuobbfmq
iContact1685219
google-site-verification=XSpTxqQA_OLHPnxU7tT1ZYU2FG7B0GvNnJSbcJvoMdU
J2rqMH9vlhkNTyiqVAFjwzp2sp2RLDiGir3YYo2UhK4=
facebook-domain-verification=agrfpzdse416nhfb77c8ly8aoulf7w
apple-domain-verification=8JgP0AJr2J1XkOjK
SFMC-HNDOFJWwnQSkX8idTb3DywEcU2kO_r8nlJWDF_D8
apple-domain-verification=NcGd7OpQUgrvPrkQ
e2ma-verification=re7fb
SPF v=spf1 include:7l3pg1rug3.powerspf.com ~all
SFMC-mTdkVW6Jm5qcUiCDf79OfKH3YKhhRt7SJ1i5niAZ
brevo-code:3af1014a7748b08a36c8531ca16ab418
243db705d2797c89d171ff91829e38d65b0723245c25fe3232ea5efbffa34e3d
_globalsign-domain-verification=0_tOnfEm3Hw1uLFBUj9C3hbA0CL74LEkkJElWKLAGg
adobe-idp-site-verification=baf204150188636b9331cc3a937e5d2e2c36fe1df8dde06e3cb3...
perplexity-ai-domain-verification-pv1rhn=kzRgtmnMDvVu5hFUGxucxi61i
google-site-verification=2rEpZ9hLvWO-J3DI1aObOfEpNo3VtC0SBVADc_C-UIo
CAALookup not available with standard resolver
Resolved in 270 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.

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+
Redirect Chain
0 redirect(s), 62 ms total
PASS
0 redirect(s), 62 ms total

https://american.edu

62 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://american.edu40362 msHTTP/1.1cloudflare
A
Crawlability
robots.txt present, no sitemap
PASS
robots.txt present, no sitemap
Info::
robots.txt is present
Got: 625 bytes
Info::
No sitemap.xml found
A sitemap helps search engines discover and index your pages more efficiently.
Info::
robots.txt references sitemap

A sitemap helps search engines discover and index your pages more efficiently.

Why this matters

No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.

Learn more ▾

A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.

Source: sitemaps.org / Google Search Central

robots.txt 200 OK
Size 625 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
# Allow search engines

User-agent: *


Sitemap: https://www.american.edu/sitemap.cfm


# Block heavy or low-value pages (infinite crawling)

Disallow: /alumni/events/

Disallow: /cas/calendar/

Disallow: /kogod/calendar/

Disallow: /sis/calendar/

Disallow: /soc/calendar/

Disallow: /spa/calendar/

Disallow: /sine-institute/calendar/

Disallow: /provost/calendar/


# Block Utility/admin pages

Disallow: /customcf/email-a-friend.cfm

Disallow: /customcf/au-experts/details.cfm

Disallow: /profiles/admin/


# Block News pages - high processing 

Disallow: /news/all-news-more.cfm

Disallow: /news/archive/all-news.cfm
sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

A+
Domain Intelligence
american.edu — 35 years, 4 months old, hosted on Cloudflare
PASS
american.edu — 35 years, 4 months old, hosted on Cloudflare
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Info::
Hosting: Cloudflare
Got: AS13335
Domain expiry

377 days

July 31, 2027

SSL certificate

138 days

Issued by Internet2

Domain age

35 years, 4 months

Registered June 3, 1991

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS13335

172.66.167.252

Registrar

Registrar unknown

Lock status unknown 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created June 3, 1991 (35 years, 4 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated June 14, 2024
Name Servers ns03.american.edu, ns01.american.edu, ns02.american.edu
Registrant American University
Hosting
IP Address 172.66.167.252
ASN AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
Provider Cloudflare
Data source: whois (0.9s)
A+
HTTP Probe Timing
Total 170 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
109 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
17 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
22 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
170 ms
Total Time Total request time from DNS lookup through full response.
170 ms

Connection waterfall

DNS Lookup 109 ms TCP Connect 17 ms TLS Handshake 22 ms Server Processing 22 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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