lmsys.org

.org crawl

First seen 2026-04-13 · Last seen 2026-05-08 · ok HTTP/1.1 200 862 ms crawled 2026-05-06

US · 216.150.1.1 · AS16509 Amazon.com, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: LMSYS Org
Description: Large Model Systems Organization - developing large models and systems that are open, accessible, and scalable.
Language: en
Canonical: https://lmsys.org/

Open Graph

url: https://lmsys.org/
title: LMSYS Org
locale: en_US
site name: LMSYS Org
description: Large Model Systems Organization - developing large models and systems that are open, accessible, and scalable.

Technology

CDN: Vercel
CMS: Next.js

Third-party hosts loaded (2)

framerusercontent.com×15
img.shields.io×6

Social

Contact

Email

contact@lmsys.org

Registration

Registrar

Cloudflare, Inc.

Created

2023-03-24

Expires

2035-03-24 3231 days left

Updated

2025-10-21

Name servers

chip.ns.cloudflare.com
meg.ns.cloudflare.com

DNS records live

NS

chip.ns.cloudflare.com
meg.ns.cloudflare.com

MX

1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

google-site-verification=HntMGfRyha5b7ZWDAeKD9tvFEJjR_xKFKkAkfiSKLb8
google-site-verification=mtnPEyPnIUH4M9Rti9Kn9FFT1qll0SMJWlm3VQQw52g

Email authentication partial

SPF: v=spf1 include:_spf.google.com -all
strict (-all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-03-31 to 2026-06-29

Expires in 41 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.lmsys.org/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=63072000