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81
Total
80
DNS
90
Email
96
Security
70
Network
60
Availability
Domainstimson.org
IPv42
IPv62
MX records1
StatusActive
Domain technical report

Home • Stimson Center

stimson.org

Leading foreign affairs think tank promoting international security and shared prosperity through applied research and global engagement.

Generated: 2026-08-11T05:36:55-05:00 · Cached result

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IPv42
IPv62
MX1
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

1 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

80 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers31 / 35 pts · Security

8 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 response0 / 40 pts · Availability

HTTP/2 403

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)
172.66.149.213
104.20.23.248

AAAA

2 record(s)
2606:4700:10::6814:17f8
2606:4700:10::ac42:95d5

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 stimson-org.mail.protection.outlook.com.

TXT

5 record(s)
"ZOOM_verify_-zjvWk6aQji2cP8um2WtNQ"
"v=spf1 include:aspmx.pardot.com include:spf.protection.outlook.com include:servers.mcsv.net include:_spf.salesforce.com ~all"
"YSVt/75TUYj4LP08L97Nm7fgHVJgAnR+qow9UZBCDcjdHgyc4seU0PWjAZxY85DW3gsywemNrKROkdAblfmt1A=="
"google-site-verification=5TAc0obaramlNwi0w6tTFvWd3-MDjM-N64zTDWzfCQk"
"MS=ms11942022"

NS

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

SOA

1 record(s)
matt.ns.cloudflare.com. dns.cloudflare.com. 2411290681 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:aspmx.pardot.com include:spf.protection.outlook.com include:servers.mcsv.net include:_spf.salesforce.com ~all

DMARC

Configured
v=DMARC1; p=reject; fo=1; rua=mailto:rua+stimson.org@dmarc.barracudanetworks.com; ruf=mailto:ruf+stimson.org@dmarc.barracudanetworks.com

DKIM

Selector selector1
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDOXj0QyMzqbZzq6gNTRtsPcryV/fgxaEqRO4mB9mBPm1rL8dwOOMaXZupXysW2l32oWRMha2K7XWxU+v1rUkx72XC6RIzuKhppGDpCKFgKmyVRXbaHV6cpE4Mlxkokopj/FgYVPGifeETbJO4VBwZB2+OEGTQpEMAcBOAWTJ1u4wIDAQAB; n=1024,1457426071,1473323671

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Home • Stimson Center
Description
Leading foreign affairs think tank promoting international security and shared prosperity through applied research and global engagement.
Final URL
https://www.stimson.org/
HTTP status
206

HTTP

Status
HTTP/2 403
Final URL
https://www.stimson.org/
Version
3
Server
cloudflare
X-Powered-By
WP Engine

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
stimson.org
Valid from
2026-08-01T10:44:27-05:00
Valid until
2026-10-30T10:44:26-05:00
Days remaining
80
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

8 active
—
HSTSNot detected
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
✓
Cross-Origin-Opener-PolicyImplemented
✓
Cross-Origin-Embedder-PolicyImplemented
✓
Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.20.23.248, 172.66.149.213
70,57 ms
Cloudflare
1.1.1.1
104.20.23.248, 172.66.149.213
27,26 ms
Quad9
9.9.9.9
104.20.23.248, 172.66.149.213
24,59 ms
OpenDNS
208.67.222.222
104.20.23.248, 172.66.149.213
112,75 ms
AdGuard
94.140.14.14
104.20.23.248, 172.66.149.213
413,31 ms

IP, geolocation and ASNAssociated network information

172.66.149.213

No data
success
No
country
region
city
asn
organization
isp

104.20.23.248

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

stimson-org.mail.protection.outlook.com

Port 25: Closed/unreachable - 24 ms - 
Port 465: Closed/unreachable - 4045.6 ms - 
Port 587: Closed/unreachable - 4021.2 ms -

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