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https://uchicago.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
82
GRADE
B
FIX
2
REVIEW
2
PASS
5
INFO
0
Probed from New York, United Stated
301 Moved Permanently
Checks
9
5 PASS 2 REVIEW 2 FIX
D
URL Variants
Action
www/non-www, trailing slash, HTTP→HTTPS
FIX
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
Critical::
HTTP version does not redirect to HTTPS
Got: HTTP 301 Expected: 301 redirect to HTTPS

www / non-www

200https://www.uchicago.edu/
200https://uchicago.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://uchicago.edu/ → http://www.uchicago.edu/

HTTP version does not redirect to HTTPS

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.

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

Certificate validity

68
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
A+
DNS Records
1 A records, 134 ms lookup
PASS
1 A records, 134 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 3.215.148.80
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ucns1.uchicago.yale.edu, ucns1.uchicago.uiowa.edu, ucns3.uchicago.edu, ucns4.uchicago.edu
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: 134 ms
Got: 134 ms
A3.215.148.80
AAAA—
CNAME—
NSucns1.uchicago.yale.edu, ucns1.uchicago.uiowa.edu, ucns3.uchicago.edu, ucns4.uchicago.edu
MX
10 mxa-002fc702.gslb.pphosted.com
10 mxb-002fc702.gslb.pphosted.com
TXT
MS=ms16652851
e2ma-verification=7r6bb
e2ma-verification=vv3gb
e2ma-verification=wyhib
4gh9ifdb9rvcghraipjl64n1rs
56tc65ukam9agll0hj5jm23lv1
_6a04w8xq8uy4zkhm9zsc1d155v9fw85
_fcls4rwh2lva5t5risnf3grvrl6mk1d
_jtcpdy05qwrc936dd47ruqg7b9ycboe
_rqc5ogctmoyosmv56nvzvy2qu61lw21
asv=68279e276e8c891f5eb62a89f5cc12f7
apple-domain-verification=V4q3pWzlXns8FwYs
jamf-site-verification=T27LjycoYtvOD0DfaMDDjg
canva-site-verification=vpi_9f6vKkap8fbj-cLNIA
cloudflare-verify.cdcshoppingcart.uchicago.edu=923282984-1139220843
sendinblue-code:56fef5f252f2b542a17d1fda290834ee
fastly-domain-delegation-msyb9pw3vbuhw6pjn-03-03-2025
1password-site-verification=TN6TZ2XIGVGOBDICLF4CQQD7OY
openai-domain-verification=dv-b09uZIIr3mLI4GDLDdEe2zjM
d365mktkey=hhKQx7KDmfLj6px2wO1BA7juhW1fkMUjmuJgmgpLswYx
d365mktkey=tkgrLNlMjlYxAXQ1DTHiFIUYvBD3VaZXrx2ubqRxZrIx
facebook-domain-verification=tboa878nofaaanhghtjo1kwze0cm1r
ms-domain-verification=bf272ab9-d33c-41ef-9227-285020dd43c5
smartsheet-site-validation=2DPkXbZLP1hLI3_U9DT7vGT3Ie5DWsEI
anthropic-domain-verification-h4xfks=DANIrUCPNB6M2xIX7kRtIaL3j
5e8ba606248599ac1230346274e5478c28729639618882b65b89452655f7baca
61669CF51912E5C87DAEB43DA0CAB76EE0228673D4538FADF36937E5D70C02C8
google-site-verification=76OrfKn9k44dGwt-aOLTY8yK0lCWR6PYAXS99nFqBe0
google-site-verification=X4HjY5FSukG984V8tDYDEYgRE3Y0z_Ece6_y3i7yS_k
solarwinds-service0desk-verification=3bee03882b802dbcfadac5b0275e8375
notion-domain-verification=I8I8bxQfblcU2PnCMNnJ252IpStFwQpocWU5RVeiGcE
globalsign-domain-verification=0a-6rIT-p01swJcsjUfmuJtWewYCUhlZtpG8KXHN3-
box-domain-verification=a05d1b0801411db67f507b3e1b437cd16794308d437116cfcd955e04...
mgZjjQ56tRLa5lXSqvX0NwVqWp2den3qJ6gJ02qxnATN8mn+29I3eaO1QsPdVaBfUNrjyNBg0Yr7l9Hv...
adobe-idp-site-verification=3de1049f726cb98ba6f91a88d5a199a7a0144ccfbba4fb24b135...
adobe-idp-site-verification=740c17ecc9161a756a2009c89a46f06d8ed8fcbcf5cbcc5929b1...
atlassian-domain-verification=KHv5WO2aIDITZzLBSr0CHScHYmV8wSQTssUI8AQvti6i2XkcL0...
atlassian-domain-verification=wQZJpWSihT7D6jx6GunzDqznM0HlcXWBVYh5LBkLQmBbdMhgZ1...
dell-technologies-domain-verification=uchicago.edu_0718c7f9-c711-4d06-af7b-4b3e5...
SPF v=spf1 ip4:128.135.176.0/23 ip4:205.208.106.0/24 ip4:167.89.0.0/17 ip4:198.37.14...
CAALookup not available with standard resolver
Resolved in 134 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.

A
Redirect Chain
1 redirect(s), 686 ms total
PASS
1 redirect(s), 686 ms total
Info::
Single redirect
Got: https://uchicago.edu → https://www.uchicago.edu/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 686 ms total
Got: 686 ms

https://uchicago.edu

57 ms · HTTP/1.1

301

https://www.uchicago.edu/

630 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://uchicago.edu30157 msHTTP/1.1Apache
2https://www.uchicago.edu/200630 msHTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 295 URLs
PASS
robots.txt present, sitemap with 295 URLs
Info::
robots.txt is present
Got: 243 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 295 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 243 B Sitemaps referenced 2 User-agents * Blocking No — crawling allowed
User-agent: *

Allow: /

Disallow: /en/

Disallow: /Test/

Disallow: /test/

Disallow: /search/

Disallow: /en/Test/

Disallow: /en/test/


Sitemap: https://www.uchicago.edu/sitemap.xml

Sitemap: https://www.uchicago.edu/emergency/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 295 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
uchicago.edu — 34 years, 10 months old, hosted on AWS
PASS
uchicago.edu — 34 years, 10 months old, hosted on AWS
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Info::
Hosting: AWS
Got: AS14618
Domain expiry

384 days

July 31, 2027

SSL certificate

68 days

Issued by Internet2

Domain age

34 years, 10 months

Registered November 22, 1991

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

AWS

ASN AS14618

3.215.148.80

Registrar

Registrar unknown

Lock status unknown 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created November 22, 1991 (34 years, 10 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated October 18, 2025
Name Servers ucns1.uchicago.uiowa.edu, ucns3.uchicago.edu, ucns4.uchicago.edu
Registrant University of Chicago
Hosting
IP Address 3.215.148.80
ASN AS14618 (AMAZON-AES - Amazon.com, Inc., US)
Provider AWS
Data source: whois (0.2s)
A+
HTTP Probe Timing
Total 57 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
24 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
6 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
21 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
57 ms
Total Time Total request time from DNS lookup through full response.
57 ms

Connection waterfall

DNS Lookup 24 ms TCP Connect 6 ms TLS Handshake 21 ms Server Processing 6 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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