sierra.com

.com crawl

First seen 2026-04-16 · Last seen 2026-05-11 · ok HTTP/1.1 200 1083 ms crawled 2026-05-11

DE · 104.126.37.129 · AS20940 Akamai International B.V.

Reputation 100/100

sector other type error page

HTML metadata

Title
Sierra.com: Something went wrong
Language
en

Technology

CDN
Akamai
Fonts
  • Google Fonts

Third-party hosts loaded (1)

  • fonts.googleapis.com×1

Registration

Registrar
MarkMonitor Inc.
Created
1991-09-25
Expires
2027-09-24 492 days left
Updated
2025-08-23
Name servers
  • a1-117.akam.net
  • a14-66.akam.net
  • a18-67.akam.net
  • a22-64.akam.net
  • a5-65.akam.net
  • a7-66.akam.net

DNS records live

NS
  • a1-117.akam.net
  • a14-66.akam.net
  • a18-67.akam.net
  • a22-64.akam.net
  • a5-65.akam.net
  • a7-66.akam.net
MX
  • 10 mxa-00081a02.gslb.pphosted.com
  • 10 mxb-00081a02.gslb.pphosted.com
  • 20 mx0a-00081a02.pphosted.com
  • 20 mx0b-00081a02.pphosted.com
TXT
  • google-site-verification=6fDczSvMJO9oJmJNVn12LSPzijhyTUHTlEMSfmHb1r4
  • yahoo-verification-key=YsGxRHqFSre2qGQ8PmxHnXX0wxSjrjT28BMBnJJHLFE=
  • _kbjv48zzq25pmo06y45ibslm7qrplaf

Email authentication strong

SPF
v=spf1 ip4:205.220.171.102 ip4:205.220.182.205 ip4:205.220.173.171 ip4:205.220.161.171 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
softfail (~all)
DMARC
v=DMARC1; p=reject; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com; fo=1;
policy: reject (enforced)
DKIM
no key found at common selectors

Certificate (current)

DigiCert Global G3 TLS ECC SHA384 2020 CA1
from 2025-10-23 to 2026-10-24
Expires in 157 days

HTTP security headers

Header hygiene 60/100 Checked live page: https://www.sierra.com/

present
  • strict-transport-security
  • x-frame-options
findings
  • missing Content Security Policy
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
SAMEORIGIN
strict-transport-security
max-age=31536000 ; includeSubDomains ; preload

Linked from (1)