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80
Total
85
DNS
90
Email
65
Security
50
Network
100
Availability
Domaintheleanstartup.com
IPv41
IPv60
MX records7
StatusActive
Domain technical report

The Lean Startup | The Movement That Is Transforming How New Products Are Built And Launched

theleanstartup.com

Discover The Lean Startup methodology, a proven approach to building and scaling innovative businesses. Learn how to validate ideas, minimize risk, and achieve sustainable growth through data-driven strategies and continuous learning.

Generated: 2026-08-12T05:56:05-05:00 · Cached result

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IPv41
IPv60
MX7
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 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 chain15 / 15 pts · Dns

DS and DNSKEY detected.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

7 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

42 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

!
HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: theleanstartup.com

i
IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

!
IPv6 connectivity0 / 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

1 record(s)
72.10.32.190

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

7 record(s)
10 aspmx.l.google.com.
20 alt1.aspmx.l.google.com.
30 aspmx5.googlemail.com.
30 aspmx2.googlemail.com.
30 aspmx3.googlemail.com.
30 aspmx4.googlemail.com.
20 alt2.aspmx.l.google.com.

TXT

3 record(s)
"f85ss02j1h7or90btmc1n3p6ph"
"openai-domain-verification=dv-2wKaSursTn486z5EDTGiZZZO"
"v=spf1 include:_spf.google.com ~all"

NS

2 record(s)
ns66.domaincontrol.com.
ns65.domaincontrol.com.

SOA

1 record(s)
ns65.domaincontrol.com. dns.jomax.net. 2025120838 28800 7200 604800 600

CAA

0 record(s)
—

Not configured

DS

2 record(s)
30726 13 2 F0BF7CD1D2CC651A857611B333ACAED2704B19ECB2CAD3835D8939E3 32FD23CE
60579 13 2 8B39B8E1267AB600DE6F547B327553AC4070F8192F8DDCADBDEF0772 EFB827B6

DNSKEY

4 record(s)
256 3 13 rXdyTiW1ktUkxuZ6V6B7ULIdEdWjm9unn64xuzMOIIsEU7cNN3XaqWph CVdk/OxqvxXdzLp3Zp3F8PI9pF/tJQ==
256 3 13 sVwx5pQabPHgAjGAgBqD5ecoU3HGFBkQsbqWqTAbXE8FgDBtUIn8Fi0R DUhWrpHqs1bRVkVOExJJCbCkFb/k5w==
257 3 13 EwRAdXWyt8ed46Yn1aCb4tSzLkyk84pWvqUY+stOGo90PDNySSXbIgjn WBGtwdfFpaLXOPIX5rluwu1hwaKcYA==
257 3 13 4CzOMGuBmPWLqcjT9x3FjDFdetFYnDfd8QeCsiXy7Rdn2FUh1nRe/o2C IfgEbQCOjMBYS6R/fUeWVmET0wV0aQ==

RRSIG

5 record(s)
DNSKEY 13 2 3600 20260824200601 20260809200601 30726 theleanstartup.com. urXWaByA45nuLNA7lgqq6HXy9h+2caRWUaiWtvglTmF5J59/ZJeD2y8r rillKb9iPod2vZMDA44gOPh8Z+2N/g==
TXT 13 2 3600 20260824200601 20260809200601 48404 theleanstartup.com. LBmY4ElVz0fCEAvgtWKQ9OWH87PSMX1iclqxp0s8a9s54H2AtAZiEI7u ShJNrpQDGW3YRBC0Gn/jkFtiFFp0nw==
NS 13 2 3600 20260824200601 20260809200601 48404 theleanstartup.com. 6F6dKyNns1uBKSdTDseDKOo5JICzxmbE0J2gof+Kj0jp/C8Jhj1Wtuyb jIkHOet6PwulaTE+eO/1MLinj7p9Vw==
MX 13 2 3600 20260824200601 20260809200601 48404 theleanstartup.com. c6tPwx1iadRX6T9Hpra0rcCEWhVlYLGY1A9PI79vY2JKYEDCnCoYVefr H6/biLUc6GjsxwrjAbXF+WzTHZBcaw==
DS 13 2 86400 20260816021851 20260809010851 41446 com. 1WqwHYrEBLf63tlP6qZnw03YzAQ9nC/HolIY2p0GxMKvvTzwFdrkuOli oGKDBX7cyIP0hckVUFVGqn5kaZY3Mw==

NSEC

1 record(s)
*.theleanstartup.com. A NS SOA MX TXT RRSIG NSEC DNSKEY CDS CDNSKEY

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:_spf.google.com ~all

DMARC

Configured
v=DMARC1; p=none; rua=mailto:info@theleanstartup.com

DKIM

Selector google
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoJUuVyjtzTUdbCKWyPrv2fB5b5NxFGuTqrDBHi9lG++Vq+ZUxh70BGxVhOAqbQAdC/+G4aiZA7o4bMeeC5B4mo8gg7+YoUIQTUmZXBdoQONiyZz1CGwLtkiA6sh2qio77Xd6Qi8QlH0L6opPCiS3l34aEMv+8G8z89KH8Ymdnsx03eObNgPz0OHkIcBQCGJZITpNOWJP8Fs2YW9kLoaForel4xC4PrFIBqsu8+n6hgkUtfk8Rizj1p8YbxRK4h2q/Ixax43LqkpHvzWvDeupqnHwKFTDWtBhC28C+Wq7gpzp61gSFkcO5J9UKLWP/hdht/LPDCHqK+Vtv1cA7RhjLwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
The Lean Startup | The Movement That Is Transforming How New Products Are Built And Launched
Description
Discover The Lean Startup methodology, a proven approach to building and scaling innovative businesses. Learn how to validate ideas, minimize risk, and achieve sustainable growth through data-driven strategies and continuous learning.
Final URL
https://theleanstartup.com/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://theleanstartup.com/
Version
3
Server
nginx
X-Powered-By
PleskLin

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
GoDaddy.com
CN
theleanstartup.com
Valid from
2026-06-25T23:41:36-05:00
Valid until
2026-09-23T23:41:36-05:00
Days remaining
42
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

0 active
—
HSTSNot detected
—
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
72.10.32.190
158,86 ms
Cloudflare
1.1.1.1
72.10.32.190
92,35 ms
Quad9
9.9.9.9
72.10.32.190
50,16 ms
OpenDNS
208.67.222.222
72.10.32.190
67,86 ms
AdGuard
94.140.14.14
72.10.32.190
65,58 ms

IP, geolocation and ASNAssociated network information

72.10.32.190

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.216.212
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

aspmx.l.google.com

Port 25: Closed/unreachable - 22.3 ms - 220 mx.google.com ESMTP 46e09a7af769-7f3b36e95d9si3161767a34.63 - gsmtp
Port 465: Closed/unreachable - 4019.2 ms - 
Port 587: Closed/unreachable - 4016.7 ms -

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