27sem.com

.com crawl

First seen 2026-04-15 · Last seen 2026-05-16 · ok HTTP/1.1 200 3919 ms crawled 2026-05-13

CN · 111.230.49.87 · AS45090 Shenzhen Tencent Computer Systems Company Limited

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: 艾奇在线 - SEM / 信息流 / 互联网广告实战学习平台
Description: 艾奇在线是 SEM / 信息流 / GEO 优化领域的互联网营销实战学习平台，每日更新广告实战技巧、投放策略、案例分析等干货，覆盖百度 SEM、腾讯广告、巨量千川、抖音信息流、小红书运营等全渠道，助力营销优化师快速成长，为企业提供专业推广参考。
Language: en

Technology

CMS: Gatsby

Third-party hosts loaded (2)

www.aikewang.com×5
s11.cnzz.com×1

Registration

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

Created

2014-09-19

Expires

2026-09-19 123 days left

Updated

2025-09-14

Name servers

dns7.hichina.com
dns8.hichina.com

DNS records live

NS

dns7.hichina.com
dns8.hichina.com

MX

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

Email authentication weak

SPF: not published
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

from 2026-04-07 to 2026-07-06

Expires in 48 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://27sem.com/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: strict-origin-when-cross-origin
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubDomains