sleeper.com

.com crawl

First seen 2026-04-14 · Last seen 2026-05-08 · ok HTTP/1.1 200 1639 ms crawled 2026-05-08

US · 104.18.15.193 · AS13335 Cloudflare, Inc.

Reputation 100/100

Classifying

HTML metadata

Title: Sleeper - Fantasy Football, Basketball, Esports, and Daily Fantasy Sports
Description: Play fantasy football, league of legends, basketball, and more!
Language: en
Canonical: https://sleeper.com

Open Graph

title: Sleeper - Fantasy Football, Basketball, and Daily Fantasy Sports
description: Play a league with friends on the #1 sports app

Technology

CDN: Cloudflare
CMS: Next.js

Analytics

Google Tag Manager

Cookie consent

OneTrust

Third-party hosts loaded (3)

sleepercdn.com×137
cdn.cookielaw.org×2
www.googletagmanager.com×2

Social

Registration

Registrar

Name.com, Inc.

Created

2001-12-10

Expires

2030-12-10 1664 days left

Updated

2021-08-06

Name servers

dawn.ns.cloudflare.com
hank.ns.cloudflare.com

DNS records live

NS

dawn.ns.cloudflare.com
hank.ns.cloudflare.com

MX

Show 6 MX records

1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
32767 ms31189313.msv1.invalid
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

46399026.spf10.hubspotemail.net

Verified for

Google
Microsoft 365

Email authentication strong

SPF: v=spf1 include:_spf.google.com -all
strict (-all)
DMARC: v=DMARC1; p=quarantine; rua=mailto:ken@sleeper.app
policy: quarantine
DKIM: no key found at common selectors

Certificate (current)

WE1

from 2026-04-24 to 2026-07-23

Expires in 63 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://sleeper.com/

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=15724800; includeSubDomains