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83
Total
90
DNS
45
Email
84
Security
100
Network
100
Availability
Domainmedlineplus.gov
IPv44
IPv68
MX records1
StatusActive
Domain technical report

MedlinePlus - Health Information from the National Library of Medicine

medlineplus.gov

Find information on health conditions, wellness issues, and more in easy-to-read language on MedlinePlus, the up-to-date, trusted health information site from the NIH and the National Library of Medicine.

Generated: 2026-08-08T19:08:18-05:00 · Cached result

JSONCSVPDFVisit site
IPv44
IPv68
MX1
NS3

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

4 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

8 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

3 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 MX record(s).

!
SPF0 / 25 pts · Mail

SPF policy not found.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

174 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers19 / 35 pts · Security

5 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: server-54-192-55-27.ord56.r.cloudfront.net

✓
IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓
IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓
HTTP response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

5 record(s)
medlineplus.awsprod.nlm.nih.gov.
54.192.55.27
54.192.55.117
54.192.55.39
54.192.55.99

AAAA

9 record(s)
medlineplus.awsprod.nlm.nih.gov.
2600:9000:24fd:6200:1:6b7c:7400:93a1
2600:9000:24fd:d600:1:6b7c:7400:93a1
2600:9000:24fd:6e00:1:6b7c:7400:93a1
2600:9000:24fd:2200:1:6b7c:7400:93a1
2600:9000:24fd:9200:1:6b7c:7400:93a1
2600:9000:24fd:4c00:1:6b7c:7400:93a1
2600:9000:24fd:5600:1:6b7c:7400:93a1
2600:9000:24fd:ea00:1:6b7c:7400:93a1

CNAME

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

MX

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

TXT

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

NS

3 record(s)
gslb02.nlm.nih.gov.
gslb01.nlm.nih.gov.
gslb03.nlm.nih.gov.

SOA

1 record(s)
gslb01.nlm.nih.gov. hostmaster.gslb03.nlm.nih.gov. 2026070107 10800 3600 604800 60

CAA

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

DS

1 record(s)
28576 8 2 126291343460E10EBB660ADDB7A14C59D8B5F3EDBBD44A1A371A0EBA 8039A069

DNSKEY

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

SRV

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

NAPTR

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

TLSA

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

SSHFP

1 record(s)
medlineplus.awsprod.nlm.nih.gov.

SPF

Not configured
—

Not configured

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:8idhoybh@ag.us.dmarcian.com,mailto:reports@dmarc.cyber.dhs.gov; ruf=mailto:8idhoybh@fr.us.dmarcian.com; fo=1;

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
MedlinePlus - Health Information from the National Library of Medicine
Description
Find information on health conditions, wellness issues, and more in easy-to-read language on MedlinePlus, the up-to-date, trusted health information site from the NIH and the National Library of Medicine.
Final URL
https://medlineplus.gov/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://medlineplus.gov/
Version
3
Server
AmazonS3
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
medlineplus.gov
Valid from
2026-01-01T18:00:00-06:00
Valid until
2027-01-30T17:59:59-06:00
Days remaining
174
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

5 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
—
Permissions PolicyNot detected
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
99.84.203.57, 99.84.203.71, 99.84.203.80, 99.84.203.91
81,26 ms
Cloudflare
1.1.1.1
54.192.55.117, 54.192.55.27, 54.192.55.39, 54.192.55.99
67,99 ms
Quad9
9.9.9.9
108.157.150.129, 108.157.150.43, 108.157.150.70, 108.157.150.77
101,62 ms
OpenDNS
208.67.222.222
99.84.203.57, 99.84.203.71, 99.84.203.80, 99.84.203.91
114,27 ms
AdGuard
94.140.14.14
108.157.150.129, 108.157.150.43, 108.157.150.70, 108.157.150.77
93,26 ms

IP, geolocation and ASNAssociated network information

54.192.55.27

No data
success
No
country
region
city
asn
organization
isp

54.192.55.117

No data
success
No
country
region
city
asn
organization
isp

54.192.55.39

No data
success
No
country
region
city
asn
organization
isp

54.192.55.99

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

medlineplus.awsprod.nlm.nih.gov

Port 25: Closed/unreachable - 43 ms - 
Port 465: Closed/unreachable - 4020.6 ms - 
Port 587: Closed/unreachable - 4017.6 ms -

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