tandem.co

.co crawl

First seen 2026-04-19 · Last seen 2026-05-16 · ok HTTP/1.1 200 5105 ms crawled 2026-05-13

US · 13.91.44.119 · AS8075 Microsoft Corporation

Reputation 95/100 weak security headers

sector tech type homepage

HTML metadata

Title: Scheduling Software by Tandem
Language: en
Canonical: https://www.tandem.co/

Technology

Server: Apache

Ads

Google Ads
Google Ads (DoubleClick)

Fonts

Google Fonts

Third-party hosts loaded (4)

browser.sentry-cdn.com×1
fonts.googleapis.com×1
googleads.g.doubleclick.net×1
www.googleadservices.com×1

Social

Contact

Email

hello@tandem.co

Phone

8668106037

DNS records live

NS

ns1.tandem.co
ns2.tandem.co
ns3.tandem.co
ns4.tandem.co

MX

0 tandem-co.mail.eo.outlook.com

TXT

Show 5 TXT records

google-site-verification=ZTHF2kgUhjA55X0q8wLw8DWKuOxb_6Tb8R0x3sU42PY
work-os-domain-verification-mdttrc=xvkzm9iw67JdFqSMilYhiCgrm
MS=ms72706624
MS=ms63775777
stripe-verification=0edab94cfa6d2d3140bfdc9a76125604232e58724ae833cc5d9708620f5f6780

Email authentication strong

SPF

v=spf1 include:spf.protection.outlook.com ip4:216.145.24.32/27 ip4:205.234.75.57 include:sendgrid.net include:spf.mail.intercom.io ip4:13.91.44.119 ~all

softfail (~all)

DMARC

v=DMARC1; p=quarantine; rua=mailto:dmarcreports@tandem.co

policy: quarantine

DKIM

s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv53V02q+eqyYVSsvPzUoTByWkK5nYxHmzJ6YLLzRjt/cCYlH3dBqxZnM97rolViDKy8ZKiPmbj+vgijzio…
s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDDbPa1gDc2AQvI/d77f5U94O9P9ShbNPkGN9L/hPMZCrSagoxVywHvqoJ+JWMiGQtiu41uCAr2yXSKQYoqklvd2Q…

selectors probed

Certificate (current)

Go Daddy Secure Certificate Authority - G2

from 2025-11-14 to 2026-12-16

Expires in 211 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://tandem.co/

present

strict-transport-security

findings

short HSTS max-age
missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=86400; preload