shuangz.com

.com crawl

First seen 2026-04-19 · Last seen 2026-05-16 · ok HTTP/1.1 200 3306 ms crawled 2026-05-13

US · 172.67.131.140 · AS13335 Cloudflare, Inc.

Reputation 100/100

Classifying

HTML metadata

Title: Shuang Zhao: Home
Language: en
Generator: Astro v6.1.5

Technology

CDN: Cloudflare

Registration

Registrar

Squarespace Domains II LLC

Created

2007-05-29

Expires

2026-05-29 10 days left

Updated

2025-05-14

Name servers

aida.ns.cloudflare.com
john.ns.cloudflare.com

DNS records live

NS

aida.ns.cloudflare.com
john.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

Email authentication strong

SPF

v=spf1 include:_spf.google.com ~all

softfail (~all)

DMARC

v=DMARC1; p=quarantine

policy: quarantine

DKIM

google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApxahlpo1BCr+NGQkt2oypADjwy494MFZ5BLDwx4GoQyPXBtCTi2th2BO/ubxVIQCW94JrNA2cLH+X8…

selectors probed

Certificate (current)

WE1

from 2026-04-04 to 2026-07-03

Expires in 45 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://shuangz.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=15552000; includeSubDomains; preload