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https://chop.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
2
PASS
7
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
7 PASS 2 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.chop.edu/
200https://chop.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://chop.edu/ → https://www.chop.edu/

Consistent

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

Certificate validity

83
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, 277 ms lookup
PASS
1 A records, 277 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 23.185.0.3
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2620:12a:8001::3, 2620:12a:8000::3
Info::
5 nameserver(s) configured
Got: ze2plecns001.chop.edu, extdns2.chop.edu, zcnplecns001.chop.edu, extdns1.chop.edu, extdns3.chop.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 (277 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 277 ms
A23.185.0.3
AAAA2620:12a:8001::3, 2620:12a:8000::3
CNAME—
NSze2plecns001.chop.edu, extdns2.chop.edu, zcnplecns001.chop.edu, extdns1.chop.edu, extdns3.chop.edu
MX
10 chop-edu.mail.protection.outlook.com
TXT
docusign=035cd9f0-9ae4-46dd-94bb-f7a0f5a43b19
MS=ms22618234
70399e00-aa0e-4234-a231-7696863bbb6f
SPF v=spf1 include:_u.chop.edu._spf.smart.ondmarc.com include:spf.protection.outlook...
vkmTzAMrEXnLhc+q6TOXFv3TTg3qoxgGdX2+0V501tts+jQTf1lvMMMGEsKeldsWBwWhn58Eu83ys0MM...
cisco-ci-domain-verification=4204fca293f1aa4ea778951076f37654ec285dfbc6fbe1f64bc...
/XGPSCHC7I0HKtJiWo6BSGltoGFtJiqqKhRll2iV/aq08dUPOr1VONoI4qPmkljEzHE4nkRbhDHEiFIk...
domain-verification=68452dac-47e1-aed2-ef06-e8d07eb0fb59
docusign=3738c455-4a3d-4699-997a-48b9717efdfe
apple-domain-verification=pSO9X9Ur2RYCulzn5b2AUs1oENIUjnIOC-ZW2Lqt9jA
MS=3C15DF287A564C945893458807666F16A8ADC956
hcp-domain-verification=2903e6258474d07b5760cd6962a1a927a2f45fe459730da583fcd2af...
434A-D677-CC9F-8ABA-0258-EC99-9282-844A
atlassian-domain-verification=P1IKR5NXLEB2qPRyQcoA3aeMMioDo2inwmt7TKBtnElt0zfHYQ...
6BKWMdNTxKezm6vZ8EQa5uA8Ljsz0sC8zfcHzLR6NBadZC/CZ50CXwdzpiH4458hBK8T/xXCnHz0Icd4...
jamf-site-verification=YR0d8WEVOOc2IaUFAyccyg
autodesk-domain-verification=FjJ5nzTwJ-1R0XUHtjg0
d365mktkey=9WldaKzew5aHaMxxi66UTxBLgxOTxFXN78V3J9mGt08x
CAALookup not available with standard resolver
Resolved in 277 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
Redirect Chain
1 redirect(s), 255 ms total
PASS
1 redirect(s), 255 ms total
Info::
Single redirect
Got: https://chop.edu → https://www.chop.edu/ (301)
Info::
WWW normalization redirect

https://chop.edu

5 ms · HTTP/1.1

301

https://www.chop.edu/

250 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://chop.edu3015 msHTTP/1.1Pantheon
2https://www.chop.edu/200250 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (0 ms)
PASS
IPv6 reachable (0 ms)
Info::
IPv6 is configured and reachable at 2620:12a:8001::3, 2620:12a:8000::3
Got: 0 ms connect
IPv6 Ready
AAAA Records 2620:12a:8001::3, 2620:12a:8000::3 Connection Reachable (0 ms)
A+
Crawlability
robots.txt present, sitemap with 9 URLs
PASS
robots.txt present, sitemap with 9 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 9 entries
Info::
Sitemap index with 9 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 10240 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
#

# robots.txt

#

# This file is to prevent the crawling and indexing of certain parts

# of your site by web crawlers and spiders run by sites like Yahoo!

# and Google. By telling these "robots" where not to go on your site,

# you save bandwidth and server resources.

#

# This file will be ignored unless it is at the root of your host:

# Used:    http://example.com/robots.txt

# Ignored: http://example.com/site/robots.txt

#

# For more information about the robots.txt standard, see:

# http://www.robotstxt.org/robotstxt.html


User-agent: *

# CSS, JS, Images

Allow: /core/*.css$

Allow: /core/*.css?

Allow: /core/*.js$

Allow: /core/*.js?

Allow: /core/*.gif

Allow: /core/*.jpg

Allow: /core/*.jpeg

Allow: /core/*.png

Allow: /core/*.svg

Allow: /profiles/*.css$

Allow: /profiles/*.css?

Allow: /profiles/*.js$

Allow: /profiles/*.js?

Allow: /profiles/*.gif

Allow: /profiles/*.jpg

Allow: /profiles/*.jpeg

Allow: /profiles/*.png

Allow: /profiles/*.svg

# Directories

Disallow: /core/

Disallow: /profiles/

# Files

Disallow: /README.md

Disallow: /composer/Metapackage/README.txt

Disallow: /composer/Plugin/ProjectMessage/README.md

Disallow: /composer/Plugin/Scaffold/README.md

Disallow: /composer/Plugin/VendorHardening/README.txt

Disallow: /composer/Template/README.txt

Disallow: /modules/README.txt

Disallow: /sites/README.txt

Disallow: /themes/README.txt

Disallow: /web.config

# Paths (clean URLs)

Disallow: /admin/

Disallow: /comment/reply/

Disallow: /filter/tips

Disallow: /node/add/

Disallow: /search/

Disallow: /user/register

Disallow: /user/password

Disallow: /user/login

Disallow: /user/logout

Disallow: /media/oembed

Disallow: /*/media/oembed

Allow: /media/oembed?url=https://www.youtube.com*

Disallow: /taxonomy/term/*

# Paths (no clean URLs)

Disallow: /index.php/admin/

Disallow: /index.php/comment/reply/

Disallow: /index.php/filter/tips

Disallow: /index.php/node/add/

Disallow: /index.php/search/

Disallow: /index.php/user/password

Disallow: /index.php/user/register

Disallow: /index.php/user/login

Disallow: /index.php/user/logout

Disallow: /index.php/media/oembed

Disallow: /index.php/*/media/oembed

#Sitemap

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


#Search pages

Disallow: /search*

Disallow: /caring-for-your-child*

Disallow: /caring-for-your-child?f*

Disallow: /doctors?

Disallow: /specialties?

Disallow: /research-studies/search?

Disallow: /research-studies/search?f*

Disallow: /programs-and-initiatives?f*

Disallow: /conditions-diseases?f*

Disallow: /doctors?keyword=

Disallow: /doctors/search?filter=

Disallow: /specialties?search=

Disallow: /research-studies/search?text=&age=

Disallow: /programs-and-initiatives?search=

Disallow: /conditions-diseases?search=

Disallow: /newsroom/search?query=

Disallow: /newsroom/search?f*

Disallow: /locations/search?f*

Disallow: /pathways/search?query=

Disallow: /caring-for-your-child?linkId*

Disallow: /research-studies/search?linkId*

Disallow: /programs-and-initiatives?linkId*

Disallow: /conditions-diseases?linkId*

Disallow: /events?*

Disallow: /events?

Disallow: /chat-with-poison-control-ref


#Clinical Pathways

Allow: /clinical-pathway/*




Disallow: /clinical-pathway/nitric-oxide-inhaled-goals-metrics-picu

Disallow: /clinical-pathway/nitric-oxide-inhaled-criteria-initiating-ino-picu

Disallow: /clinical-pathway/nitric-oxide-inhaled-criteria-initiating-ino-evaluation-of-wean-tolerance-picu

Disallow: /clinical-pathway/ventilator-weaning-picu-cohort

Disallow: /clinical-pathway/ventilator-weaning-picu-leak-negative-inspiratory-force-nif-tests

Disallow: /clinical-pathway/cicu-ventilator-weaning-cohort

Disallow: /clinical-pathway/cicu-ventilator-weaning-leak-and-negative-inspiratory-force-nif-tests

Disallow: /clinical-pathway/asthma-patient-education-primary-care

Disallow: /clinical-pathway/asthma-assessment-key-points-primary-care

Disallow: /clinical-pathway/tethered-cord-release-goals-metrics

Disallow: /clinical-pathway/tethered-cord-release-signs-symptoms-tethered-cord

Disallow: /clinical-pathway/tethered-cord-release-cohort

Disallow: /clinical-pathway/tethered-cord-release-preoperative-phase-anesthesia-team

Disallow: /clinical-pathway/tethered-cord-release-intraoperative-phase-anesthesia-team

Disallow: /clinical-pathway/tethered-cord-release-postoperative-phase-simple-tethered-cord-guidance

Disallow: /clinical-pathway/tethered-cord-release-postoperative-phase-complex-tethered-cord-guidance

Disallow: /clinical-pathway/fentanyl-infusion-management

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-goals-metrics

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-cohort

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-preoperative-phase-orthopedic-evaluation

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-considerations-for-delayed-extubation

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-risk-stratification-and-postoperative-planning

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-preoperative-phase-anesthesia-team

Disallow: /clinical-pathway/propofol-infusion-management

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-intraoperative-loss-of-neuromonitoring-signals

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-intraoperative-phase-anesthesia-team

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-postoperative-phase-pod-0-standard-guidance

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-postoperative-complications

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-postoperative-phase-pod-1-through-discharge-standard-guidance

Disallow: /clinical-pathway/neuromuscular-scoliosis-spinal-fusion-postoperative-phase-pod-1-through-discharge-additional-guidance-for-picu-management

Disallow: /clinical-pathway/anaphylaxis-goals-metrics

Disallow: /clinical-pathway/anaphylaxis-patient-education

Disallow: /clinical-pathway/anaphylaxis-provider-resources

Disallow: /clinical-pathway/anaphylaxis-child-with-suspected-anaphylaxis

Disallow: /clinical-pathway/anaphylaxis-primary-care-guidance-for-home-management-of-suspected-anaphylaxis

Disallow: /clinical-pathway/anaphylaxis-guidelines-evidence-summary

Disallow: /clinical-pathway/anaphylaxis-epinephrine

Disallow: /clinical-pathway/anaphylaxis-history-physical

Disallow: /clinical-pathway/anaphylaxis-adjunctive-medication

Disallow: /clinical-pathway/anaphylaxis-discharge-medications-teaching

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-summary-of-pathway-updates

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-goal-metrics

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-patient-education

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-provider-resources

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-child-suspected-or-diagnosed-malnutrition-or-weight-loss

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-risk-of-refeeding-syndromes

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-history-physical

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-laboratory-studies

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-guidelines-for-telemetry-icu-when-admitting-children-with-malnutrition

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-criteria-for-admission

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-electrolyte-repletion

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-vitamins-electrolytes-minerals

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-nutritional-rehabilitation-program

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-complications-of-malnutrition

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-discharge-criteria

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-family-based-treatment

Disallow: /clinical-pathway/malnutrition-weight-loss-eating-disorders-other-outpatient-care

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-hematologic-response-to-iron-therapy

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-iron-therapy-iv

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-iron-therapy-enteral

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-differential-microcytic-anemias

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-goals-metrics

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-patient-education

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-cohort

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-history-physical

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-additional-testing-considerations

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-interpretation-of-iron-studies

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-hematology-consult-indications

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-common-causes-of-iron-deficiency

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-admission-considerations

Disallow: /clinical-pathway/iron-deficiency-with-without-anemia-prbc-transfusion-guidance

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-goals

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-patient-education

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-clinical-assessment-mild-moderate-severe-symptoms

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-echocardiogram-staging-of-pda

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-enteral-feeding

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-pharmacologic-treatment

Disallow: /clinical-pathway/pda-management-first-month-high-risk-preterm-neonate-percutan
sitemap.xml 200 OK
Type Sitemap Index URLs 9 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
chop.edu — 32 years, 3 months old
PASS
chop.edu — 32 years, 3 months old
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Domain expiry

410 days

July 31, 2027

SSL certificate

83 days

Issued by Let's Encrypt

Domain age

32 years, 3 months

Registered June 23, 1994

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2620:12a:8000::3

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 23, 1994 (32 years, 3 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated October 30, 2025
Name Servers extdns3.chop.edu, extdns2.chop.edu, extdns1.chop.edu
Registrant The Children's Hospital of Philadelphia
Hosting
IP Address 2620:12a:8000::3
Data source: whois (0.8s)
A+
HTTP Probe Timing
Total 124 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
117 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
0 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
4 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
125 ms
Total Time Total request time from DNS lookup through full response.
125 ms

Connection waterfall

DNS Lookup 117 ms TCP Connect 0 ms TLS Handshake 4 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-toj-leto2350020-TOJ
Info::
CDN cache status: HIT
CDN Detected: Fastly
Provider Fastly Cache Status HIT Evidence x-served-by: cache-toj-leto2350020-TOJ
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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