linkoptik.com

.com crawl

First seen 2026-04-15 · Last seen 2026-05-13 · ok HTTP/1.1 200 2607 ms crawled 2026-05-09

CN · 47.110.34.166 · AS37963 Hangzhou Alibaba Advertising Co.,Ltd.

Reputation 87/100 weak security headers no dmarc policy

sector tech type homepage

HTML metadata

Title: 激光粒度仪(国内激光粒度仪厂家远销杭州/深圳/上海等地区)珠海真理光学仪器有限公司
Description: 珠海真理光学仪器有限公司(www.linkoptik.com)是国内激光粒度仪厂家,专注于粒度仪的研发、生产、销售于一体的高科技型企业.主营产品有纳米激光粒度仪,粉体粒度仪,Zeta电位分析仪,粒经分布,等,多年的科学研究和技术创新成果，为测量和分析高速喷雾的粒度奠定了基础。欢迎来电洽谈！

Technology

Server: Tengine

Contact

Email

4009003950sale@linkoptik.com

Phone

4009003950

Registration

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

Created

2016-11-07

Expires

2026-11-07 171 days left

Updated

2025-10-15

Name servers

dns10.hichina.com
dns9.hichina.com

DNS records live

NS

dns10.hichina.com
dns9.hichina.com

MX

10 mxbiz2.qq.com
5 mxbiz1.qq.com

Email authentication weak

SPF: v=spf1 include:spf.mail.qq.com ~all
softfail (~all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

Certum Domain Validation CA SHA2

from 2025-05-20 to 2026-06-19

Expires in 30 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://www.linkoptik.com/

present

x-frame-options
referrer-policy

findings

missing HSTS
missing Content Security Policy
missing content type protection
missing Permissions Policy

Header values

referrer-policy: unsafe-url
x-frame-options: SAMEORIGIN