langchain.com

Observed Jul 21, 2026, 19:09 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation — watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Runs onCloudflare

Email byGoogle Workspace

Secured byGoogle Trust Services

Registered withGoDaddy.com, LLC

Also usesGoogle Search ConsoleHubSpot

ai_ml

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat langchain.com actually stands on - every host below is a signed observation

langchain.com

A / AAAA

198.202.211.1

Cloudflareserves the site

ns-cloud-c1.googledomains.comns-cloud-c2.googledomains.comns-cloud-c3.googledomains.comns-cloud-c4.googledomains.com

googledomains.comanswers its DNS

smtp.google.com

Google Workspacereceives its email

TLS

langchain.com

Google Trust Servicesissued its certificate

DNS Records

A 1

198.202.211.1

MX 1

1smtp.google.com

TXT 10

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

NS 4

ns-cloud-c1.googledomains.com
ns-cloud-c2.googledomains.com
ns-cloud-c3.googledomains.com
ns-cloud-c4.googledomains.com

SOA 1

ns-cloud-c1.googledomains.com cloud-dns-hostmaster.google.com

CAA 9

issue "amazon.com"
issue "digicert.com; cansignhttpexchanges=yes"
issue "letsencrypt.org"
issue "pki.goog; cansignhttpexchanges=yes"
issue "sectigo.com"
issuewild "digicert.com; cansignhttpexchanges=yes"
issuewild "letsencrypt.org"
issuewild "pki.goog; cansignhttpexchanges=yes"
issuewild "sectigo.com"

TLS Certificates (3)

Common Name	Issuer	Expires
`langchain.com`	C=US, O=Google Trust Services, CN=WE1	Tue, 29 Sep 2026 03:55:41 +0000
`WE1`	C=US, O=Google Trust Services LLC, CN=GTS Root R4	Tue, 20 Feb 2029 14:00:00 +0000
`GTS Root R4`	C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA	Fri, 28 Jan 2028 00:00:42 +0000

Subdomains (0)

None observed.

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for langchain.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/langchain.com">
  <img src="https://domaindrift.io/badge/langchain.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for langchain.com">
</a>

Ed25519 Receipt

Receipt ID: rcpt_d11163ebc5727e19
Output Hash: d6e460090f1b9ba6d0667d0744d4cfb5c8f6fb8e07ee6aefeac3e23fff06f570
Signature: ed25519:38444c2fbd032c25021ffab0f1652776d6fd35e1a8488be37baa60d8c0d93d4121a49c4d5416dc1abc0ae1463b8d410156a91f3eca8a3cca56d894240d63b905
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/langchain.com