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77
Total
90
DNS
70
Email
73
Security
20
Network
100
Availability
Domainlangchain.com
IPv41
IPv60
MX records1
StatusActive
Domain technical report

LangChain: Observe, Evaluate, and Deploy Reliable AI Agents

langchain.com

LangChain provides the engineering platform and open source frameworks developers use to build, test, and deploy reliable AI agents.

Generated: 2026-08-09T07:16:38-05:00 · Cached result

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IPv41
IPv60
MX1
NS4

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

4 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 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.

!
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

50 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

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)
198.202.211.1

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

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

TXT

9 record(s)
"google-site-verification=MZV-DrUglhroyDj0lCk7AP5YOKy4GGEgUaIyLjCXEb8"
"google-site-verification=wUPxN5SwJJSQGceU6cVjpkHI-08DZaqJSlAgg_55nj4"
"xbuvf8ogot"
"google-site-verification=wP16h2Joxep73RW-Hb8fneAizDK4FCn_6a4DnsbOdrM"
"v=spf1 include:_spf.google.com include:242623570.spf06.hubspotemail.net include:servers.mcsv.net ~all"
"google-site-verification=nezqC2hbpeFSFJDIKE_6_ADSKsl4j9dTvwk782NSL9E"
"linkedin-site-verification=f15545d4-d50f-424a-9076-ceebd5e91424"
"google-site-verification=d192uA19ZkwkREu9NZKM9hxDB1t90uIMHp5gFbBBuzw"
"MS=ms60202630"

NS

4 record(s)
ns-cloud-c3.googledomains.com.
ns-cloud-c4.googledomains.com.
ns-cloud-c2.googledomains.com.
ns-cloud-c1.googledomains.com.

SOA

1 record(s)
ns-cloud-c1.googledomains.com. cloud-dns-hostmaster.google.com. 2 21600 3600 259200 300

CAA

9 record(s)
0 issue "sectigo.com"
0 issue "amazon.com"
0 issue "letsencrypt.org"
0 issuewild "sectigo.com"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issuewild "pki.goog; cansignhttpexchanges=yes"
0 issuewild "letsencrypt.org"
0 issuewild "digicert.com; cansignhttpexchanges=yes"
0 issue "pki.goog; cansignhttpexchanges=yes"

DS

1 record(s)
46015 8 2 2DBA2D592D013018C193153068E3B80C7F878F5AE3F5D6F3051E791B 30242CC4

DNSKEY

2 record(s)
257 3 8 AwEAAezmQcTlqBrCGj3/9EF7fAPYmrxlG/K0xlyISjhWK4sir6HJpgjT zF6MblKI5EBnBT8YGH09KACS9Xs1zM6BMh/5wrlyxqejMsHuF7Ybhj4Q DMaVQvXLq2B5IZOWe5lzKqoAqCFStnl3Iga2+lo5rJyjXoqBx9Clu2ja MGrpnhuKLtmYRLKbyHCKlVCtX536QmKHjECE/T4fbl52n/jqH8uTA+sz f2uhW3WEAqjq4tfgn74D/crmKv4GlyJydRTmUqqFTK/kbHNtlh6h/kFl cL01ibtpGLG3b1LztE/GaSv3PdJKz5C/hHGEs7BFyteYG6TlK/1iHvtV XOcS8DBfn/0=
256 3 8 AwEAAZ246vZZL/Yjk0eb5Q/cVxfMH9FuxWjNOGGhA1bGdl6iUrWpSzyT 2+SgjwMzD8aeFW3hpf462BbaDQa1/JowYAudUnBG8XQmPS/TtufQqHch R6GWzXZLix6idqhzMJSutgTmflEwERRrEEu/IY0wYTrNATx6XlErpNWm vUFSQ8qT

RRSIG

10 record(s)
NS 8 2 21600 20260827111728 20260805111728 57073 langchain.com. YX7Bqt/t0BGSwqSusv8WEW5t9zYxNACiMuFsBBQu8mcMxuY1+34a07G8 xT44TkfiXMJ6wOEkHMVwIV7n3ELrHJ6rAlLORGy/H1xFwPBe9qRFTJUK bqHAF+SKu3DAzbDMsxApEXSuTJ8XDIoaeJ/rSk0l0IPE4kKZ5LFvOeb1 P9w=
A 8 2 300 20260827111728 20260805111728 57073 langchain.com. MjUHh6qPzJ8YKa06EA5+ok3OlQ8hjNr5coyRcirqOiKyDp/qoN/I9Ipe OzP8sY6METVTpGeWTk2FFAkF9I78NFEwc42vbZn/Hh2OK7LIX+t2U5cT a9c12n+XPrS9GuKUTlnuL5SDYxFxctSj6AN3E4YzlpcLNUi+W0vk7WSt 80A=
SOA 8 2 21600 20260827111728 20260805111728 57073 langchain.com. GLfLLToB/obzw78YUH8gGowYCZff/9zyIoqPaLZU+P1dVJI+TWRjytzt sRVEAzV3big3WMrmLSBqIIKpQfyFQgNRVeDIpXgDLFo/g32pvvJbRZYB HQmxoJIi6D3H9lB4NWTJlDp07Pi37A+LbG/IodWMvKTxG+u0GHD/jQtl mPs=
MX 8 2 300 20260827111728 20260805111728 57073 langchain.com. gc0h9LRhHxvqvQxQmQc0XakqqVD3j3kfvksclIysO6n96eE3V/rwk4W8 UjTK2c64b7qAKKf6fa0EcSOen2EKls+ar/h71r39q8/umclPW92fBTh6 YQW/zwf4LDttaDmDOpanqKSns8/hnITbdzRDqG1BfMU/RGvhmnzsfMac jZc=
DNSKEY 8 2 300 20260827111728 20260805111728 46015 langchain.com. ejcAgbGfSodxskCjuMDP97xOGKYVcWQpcXtr4fmsDnqDYzD0d7YIAWbk yLg/snOHc7oqNCeHqoQQtrsIPecFgL97qZI/DBr6r67ATcC91JfeJfAe WsJhvBm3xDm9cP0xBbifqcSljl3WJLgDaTETY+DOW53waPAT/Ce5IoFy QtTMgEsCpOK7Us4nFq8p4bfm167rDy0d/XRACiDbJ2cl0vuatzkJPCWW qo8CynrQ7yFm+pJhmShd1MjJRGQLqzCnEfPiWmhkZ4cZA2zp/K2QNuB2 TbxYo3nORwSIC1gIGwB0OUXQCpwwHHT2BmNA4Rmw/Qw+KaeuIeDyydTB nEqESQ==
TXT 8 2 3600 20260827111728 20260805111728 57073 langchain.com. GCZAceVWssmNE0QvwZA8P3C9meLak7txGnaOYQE0jSFtkRYc0GfoaSuE JG52j4rmaI4v3gfnFxkLyMrpl6yHR30iiVNM/TCKbUX6v36FDnJUGvf/ guSsEckRu8BLIuLLt1q5SjrDY0MZ0oQNET9uf4T4rRHMIHNA0JV8pvxu C28=
DS 13 2 86400 20260815015029 20260808004029 41446 com. /rL9cpID7z3vdJyq36+ZJV+ph9/wIgxNyyPstcbMtbDAo1iO7XF2HyJi d7UfaufzcMy8DMVswurrFx1w5iITMA==
CAA 8 2 300 20260827111728 20260805111728 57073 langchain.com. AdbbLKKGx7Q0dLC5uW7krvqpTtXAmqTpyEU36SEj7H9swJQKCBCrhKVB htiuL1dUqNVU5KT+PeXtOigGb3fOPyLDd+mGtuzKZEWPYBzz3VRt8j+m 5yAXJIs6IZmdCXs37S26a6+p5bT5I+eWZq+vsIzMDy9Thq+NSD91nE8G pME=
CDS 8 2 300 20260827111728 20260805111728 46015 langchain.com. dLbO9/zHBbpTpyFOv0GxUi7rpAjnnMePWaoPLVuVqx7GDi6ceBsp+U6u Odz8gMoT9gBqGY3Ed5SvLamRhmNIYewPN9/Z5Cyr/LojvsmkxISCXFuF 9eT7149IUNMgm/qOjWTZ5guqlFNj9uRZwUTJGmn6neFHS9Xl2FYKQcv/ ctWP21P1QyppqSVqny5XGDR8CoNOyljF9CJFzGYp5ZT8135rbb21MPPW BFpc00tqIs8plsHlYRtqi0RE3pvdINwTI+DaKCqiCXiX++SJALqoCwAB TwhtNIm6qk+CyH3SeBmNa82W0ETH4fkNBgZBH4maWdgGBRgKHBauf/zq b2uKcQ==
NSEC3PARAM 8 2 0 20260827111728 20260805111728 57073 langchain.com. GcNIWQ/x82o8WROzD2PzAjft23w35MGlleik5Ui4H4dSCu/FDVWg63N8 nl3fhwXmzoHyeSqoDRdid+kUASG4da+atUiT7M2H72g0ZhOSkPJ9PghW X0jv6SuCmL8dlHWQCOzwe03Jre8BvWQFFFUPzWY8kWnLAgUIV5z7QsFr HnM=

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:_spf.google.com include:242623570.spf06.hubspotemail.net include:servers.mcsv.net ~all

DMARC

Configured
v=DMARC1; p=reject; sp=reject; pct=100; adkim=r; aspf=r; rua=mailto:postmaster@langchain.dev,mailto:254220@dmarcmntr.com; ruf=mailto:254220@dmarcmntr.com; fo=1

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
LangChain: Observe, Evaluate, and Deploy Reliable AI Agents
Description
LangChain provides the engineering platform and open source frameworks developers use to build, test, and deploy reliable AI agents.
Final URL
https://www.langchain.com/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.langchain.com/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
langchain.com
Valid from
2026-06-30T21:55:49-05:00
Valid until
2026-09-28T22:55:41-05:00
Days remaining
50
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

2 active
—
HSTSNot detected
✓
Content Security PolicyImplemented
—
X-Content-Type-OptionsNot detected
✓
X-Frame-OptionsImplemented
—
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
198.202.211.1
68,78 ms
Cloudflare
1.1.1.1
198.202.211.1
107,69 ms
Quad9
9.9.9.9
198.202.211.1
86,53 ms
OpenDNS
208.67.222.222
198.202.211.1
100,71 ms
AdGuard
94.140.14.14
198.202.211.1
164,55 ms

IP, geolocation and ASNAssociated network information

198.202.211.1

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

smtp.google.com

Port 25: Closed/unreachable - 22.8 ms - 220 mx.google.com ESMTP 586e51a60fabf-459f214e3f9si5952867fac.365 - gsmtp
Port 465: Closed/unreachable - 4019 ms - 
Port 587: Closed/unreachable - 4038.5 ms -

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