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86
Total
80
DNS
90
Email
84
Security
70
Network
100
Availability
Domainnccn.org
IPv42
IPv62
MX records2
StatusActive
Domain technical report

National Comprehensive Cancer Network - Home

nccn.org

Explore the National Comprehensive Cancer Network—leading cancer care guidelines, resources, research, and global initiatives.

Generated: 2026-08-10T16:58:25-05:00 · Cached result

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IPv42
IPv62
MX2
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

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

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

!
DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

2 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

123 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 DNS0 / 30 pts · Network

PTR not detected.

✓
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

2 record(s)
104.20.38.117
172.66.158.135

AAAA

2 record(s)
2606:4700:10::6814:2675
2606:4700:10::ac42:9e87

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
10 us-smtp-inbound-2.mimecast.com.
10 us-smtp-inbound-1.mimecast.com.

TXT

10 record(s)
"v=spf1 include:us._netblocks.mimecast.com include:cvent-planner.com include:spf.protection.outlook.com include:rp.oracleemaildelivery.com ip4:167.89.81.19 include:amazonses.com -all"
"MS=ms37800608"
"cisco-ci-domain-verification=71d4cc239217fc921a9bd1b10f99c4ba852b3495e49b67a0ea857e23880fdc2f"
"w979wl7jdfmqg4y86f4w083crm5hlc1h"
"_f0pgegbkpuqjuxbujg6vukii8b2i1pz"
"duo_sso_verification=JXRwbwNoXEoWmj3WanPtL1TY8eNREKLWTQYPEbr7SDMutvJrmF7mwWCigMOY9k2r"
"google-site-verification=mGmBwJKzKyUusy27TXlRWkrL18Sm-L9OkP6pwg9oozU"
"zUl5qL77PaCJueTZ"
"_bisdpaznul8x9ow52ymeglrzuegq8bl"
"9jvy8gx8bvdxj7crzmmm2j0sng5nrdt3"

NS

2 record(s)
melissa.ns.cloudflare.com.
darwin.ns.cloudflare.com.

SOA

1 record(s)
darwin.ns.cloudflare.com. dns.cloudflare.com. 2410145571 10000 2400 604800 1800

CAA

0 record(s)
—

Not configured

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 include:us._netblocks.mimecast.com include:cvent-planner.com include:spf.protection.outlook.com include:rp.oracleemaildelivery.com ip4:167.89.81.19 include:amazonses.com -all

DMARC

Configured
v=DMARC1; p=quarantine; rua=mailto:1bdcd46cacb84f42af34af19542a2cde@dmarc-reports.cloudflare.net,mailto:dmarc@nccn.org; pct=100; adkim=r; aspf=r

DKIM

Selector selector1
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC9/uI6NplZNIrBVP1Y8gE106n+Z6AxLjBdI8oD/xjCvXwsXujewvYKV6DE24QL+XWU0oX+jdDaxCNiJGt9i4IhTj0vUx3y5Qr8UhbRRR6BohnEwYgcyEpRRBbt13ARqVDwh/mPqxx3a9aDXP3903mlb5OPgzVyaLe0u8EweNOQMQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
National Comprehensive Cancer Network - Home
Description
Explore the National Comprehensive Cancer Network—leading cancer care guidelines, resources, research, and global initiatives.
Final URL
https://www.nccn.org/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.nccn.org/
Version
3
Server
cloudflare
X-Powered-By
ASP.NET

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
DigiCert Inc
CN
www.nccn.org
Valid from
2026-05-26T19:00:00-05:00
Valid until
2026-12-11T17:59:59-06:00
Days remaining
123
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

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

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.20.38.117, 172.66.158.135
73,23 ms
Cloudflare
1.1.1.1
104.20.38.117, 172.66.158.135
44,76 ms
Quad9
9.9.9.9
104.20.38.117, 172.66.158.135
119,45 ms
OpenDNS
208.67.222.222
104.20.38.117, 172.66.158.135
75,01 ms
AdGuard
94.140.14.14
104.20.38.117, 172.66.158.135
389,94 ms

IP, geolocation and ASNAssociated network information

104.20.38.117

No data
success
No
country
region
city
asn
organization
isp

172.66.158.135

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

us-smtp-inbound-2.mimecast.com

Port 25: Closed/unreachable - 1.2 ms - 
Port 465: Closed/unreachable - 4019.9 ms - 
Port 587: Closed/unreachable - 28.8 ms - 220 us-smtp-inbound-1.mimecast.com ESMTP; Mon, 10 Aug 2026 17:58:24 -0400

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