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82
Total
80
DNS
90
Email
69
Security
70
Network
100
Availability
Domainunderstood.org
IPv42
IPv62
MX records1
StatusActive
Domain technical report

Understood - For learning and thinking differences

understood.org

Understood.org is the leading nonprofit empowering the 70 million people with learning and thinking differences in the United States.

Generated: 2026-08-09T18:19:37-05:00 · 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

202 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers4 / 35 pts · Security

1 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)
104.18.15.133
104.18.14.133

AAAA

2 record(s)
2606:4700::6812:e85
2606:4700::6812:f85

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 smtp.google.com.

TXT

20 record(s)
"bs0tw4pbx73ck9b5hrw9w4cfvsy2fsl1"
"securitystudio-site-verification=G8gyGWRTEswJT49hGOwMvg=="
"apple-domain-verification=4EzXUQxFkglbg3hW"
"google-site-verification=stm0kS3xFBkm3P9Th1y31NB_DUixFETGK7L-0ObqOfU"
"qjr187zvqb5d3nh4jghw34ntlk9s0xng"
"miro-verification=c7fe622056c95945a101c8f95e5956e8702b8301"
"MS=ms36583737"
"0ed1fe018a142d1276c1ee49dfa5e1b1b939a9b8ea"
"google-site-verification=7Tt3BipfbqkrdTX5GgQsY8CdZpkjFQOjIFs_Mo2Tcm0"
"contractworksverify = 2XFwQ3o62jdjdyQyJFfzwt"
"fcp51l2t5mpdzf6d6x1ptmzlnnnn807f"
"facebook-domain-verification=gn0zf1wnv3tdo7ahfovpji41ho8v3p"
"_jr2013rd8nglahx0ag3qlqt569265d4"
"mongodb-site-verification=xDxEGRjhRDlliS2UR2V3MwU9cq59bbAt"
"tmes=0bb5c6ba1c638cde600907776df1f1f9"
"twilio-domain-verification=8260bdea6b9954209f72e17245c2f656"
"v=spf1 include:emsd1.com include:us._netblocks.mimecast.com include:mail.zendesk.com include:mg-spf.greenhouse.io include:spf.mandrillapp.com include:servers.mcsv.net include:_spf.google.com include:spf.protection.outlook.com ~all"
"84dw58n4ws11qbtlc6pwbkwvj0gs70m8"
"atlassian-domain-verification=fx76FFIQkS9nthOLKFwI226APT1ig0M3WzX0cgr/8sdMeKOPwiFcIWkFRnoJJ1d7"
"google-site-verification=TP0HWSLqOyry4MD8dqXenu2rtR1tcC64wGybEN-T9fc"

NS

2 record(s)
fred.ns.cloudflare.com.
jill.ns.cloudflare.com.

SOA

1 record(s)
fred.ns.cloudflare.com. dns.cloudflare.com. 2411051500 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:emsd1.com include:us._netblocks.mimecast.com include:mail.zendesk.com include:mg-spf.greenhouse.io include:spf.mandrillapp.com include:servers.mcsv.net include:_spf.google.com include:spf.protection.outlook.com ~all

DMARC

Configured
v=DMARC1;  p=quarantine; pct=5; rua=mailto:ipm45a6@ar.glockapps.com,mailto:dmarc-reports@understood.org; ruf=mailto:ipm45a6@fr.glockapps.com; adkim=r; aspf=r; fo=1

DKIM

Selector google
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCFkRFedGOScW0SGvM1M4PydAvmX6CaMQ1JaRjwfTkE2Po5FeiayEyFEQS2dSBQvpP6o0BBgTo0mDK27VrIc8HfNL5th6JXkV00wHEXILkZl26BtZ6WRqKcv5sXCDSYTcTwBoH/LdLBsr4oCsrrfGbLbrD+N6A+Cl+FkAOSthNTSwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Understood - For learning and thinking differences
Description
Understood.org is the leading nonprofit empowering the 70 million people with learning and thinking differences in the United States.
Final URL
https://www.understood.org/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.understood.org/
Version
3
Server
cloudflare
X-Powered-By
Next.js

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
DigiCert Inc
CN
*.understood.org
Valid from
2026-01-26T18:00:00-06:00
Valid until
2027-02-27T17:59:59-06:00
Days remaining
202
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

1 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
Referrer PolicyNot detected
—
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
104.18.14.133, 104.18.15.133
49,08 ms
Cloudflare
1.1.1.1
104.18.14.133, 104.18.15.133
71,66 ms
Quad9
9.9.9.9
104.18.14.133, 104.18.15.133
32,13 ms
OpenDNS
208.67.222.222
104.18.14.133, 104.18.15.133
33,67 ms
AdGuard
94.140.14.14
104.18.14.133, 104.18.15.133
278,60 ms

IP, geolocation and ASNAssociated network information

104.18.15.133

Identified
success
Yes
country
United States
country_code
US
region
California
city
San Francisco
latitude
37.7749113
longitude
-122.4185412
asn
13335
organization
Cloudflare, Inc.
isp
Cloudflare, Inc.
timezone
America/Los_Angeles

104.18.14.133

Identified
success
Yes
country
United States
country_code
US
region
California
city
San Francisco
latitude
37.7749113
longitude
-122.4185412
asn
13335
organization
Cloudflare, Inc.
isp
Cloudflare, Inc.
timezone
America/Los_Angeles

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

smtp.google.com

Port 25: Closed/unreachable - 22.1 ms - 220 mx.google.com ESMTP 006d021491bc7-6b04d29c2e1si3399449eaf.88 - gsmtp
Port 465: Closed/unreachable - 4014.1 ms - 
Port 587: Closed/unreachable - 4019.6 ms -

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