637.net.cn website report
六三七
Last scanned
Overall score
Fair
About 637.net.cn
637.net.cn is a website. It describes itself as “六三七】是面向装修行业的综合型黄页门户网站，也是国内起步较早、覆盖范围广泛的装修行业核心门户之一。…”.
Score profile
Top issues to fix
17 issues found · 7 high priority
No valid HTTPS/TLS certificate
SecurityServe the site over HTTPS (a free Let's Encrypt certificate works) — browsers mark HTTP sites as Not Secure and Google demotes them.
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
+11 more issues — details in the sections below.
How it compares
637.net.cn scores higher overall than 3% of the 163,243 sites we have scanned.
vs. All scanned sites
163,243 sitesThe dot is this site; the tick is the typical (median) score for the group. The number on the right is the percentile: the share of the group this site scores above.
Technology stack
637.net.cn is built with Nginx.
Servers (1)
Hosting & DNS
- IP address
- —
- ASN
- —
- IPv6
- Not supported
- HTTP
- HTTP/1.1
Show DNS record values
TXT record contents are not republished; only their count is shown.
Security
637.net.cn did not present a TLS certificate and sets 0 of 6 recommended security headers.
Security headers0 of 6 set
- HSTSForces HTTPS
- CSPBlocks injected scripts
- X-Frame-OptionsStops clickjacking
- X-Content-TypeStops MIME sniffing
- Referrer-PolicyLimits URL leakage
- Permissions-PolicyRestricts browser features
TLS certificate
No TLS certificate was presented.
Email security
637.net.cn does not receive email, but does not fully block others from sending mail in its name.
No MX records: this domain does not receive mail.
- SPFNot set
No SPF record: anyone can claim to send mail from this domain.
- DMARCNot set
No DMARC policy: forged mail is not told to be rejected.
- MTA-STSNot set
Not published; mail to this domain can be downgraded to plaintext.
- BIMINot set
Not published (optional).
Performance & carbon
637.net.cn scores 80/100 for performance, with an estimated load time of 4.6 s. A visit emits an estimated 0.02 g of CO2 (grade A+).
Page weight
- HTML 63.3 KB
- Est. load
- 4.55 s
- Response
- 4.55 s
- Scripts / CSS
- 0 / 4
Carbon per visitA+
0.02 g CO2 per uncached view
Estimate from the Sustainable Web Design model. HTML, JavaScript and CSS only; images, video and fonts are not measured. Treat it as a lower bound for comparing pages, not an audit.
SEO & accessibility
637.net.cn scores 55/100 for SEO and 45/100 for accessibility, with 7 SEO issues to fix.
Heading structure
No H1 found.
Image alt text
17 images · 17 without alt text · 0 lazy-loaded
Links
- Internal 172
- External 3
- Broken 20
SEO issues7
- Meta description longer than 160 characters
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues4
- Over half of images are missing alt text
- No H1 heading found
- Missing <html lang> attribute
- Missing viewport meta tag
Technical details
Page metadata, social tags, crawl files and scan information.
Meta tags
- Title
- 六三七
- Description
- 【六三七】是面向装修行业的综合型黄页门户网站，也是国内起步较早、覆盖范围广泛的装修行业核心门户之一。 【六三七】以“提升装修企业技术水平、提高装修企业工作效率、降低装修企业生产成本”为核心服务宗旨，深度整合全国装修行业网络资源，打通信息流转、技术对接、商务合作的全链路，是装修行业企业对外宣传的核心窗口，也是全行业信息互通、资源共享的关键桥梁。 【六三七】设置了企业名录、产品信息，知识问答等核心功能栏目，覆盖装修全产业链，为上下游相关企业提供全维度技术支持与配套服务。 【六三七】依托线上线下整合式营销能力，通过专业的SEO&GEO服务、推送企业信息和联系方式，为企业实现互动式、口碑式的宣传；助力企业提升在搜索引擎和大模型中的品牌美誉度与用户粘性。 【六三七】作为国内极具影响力的装修行业综合服务平台，平台始终致力于推动行业数字化转型与电子商务落地，为企业搭建、便捷的信息化服务通道。
- Canonical
- Language
- Robots meta
Crawl files
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
Structured data
No JSON-LD types declared.
- Microdata items
- 0
- RDFa items
- 0
Scan
- Final URL
- http://www.637.net.cn/
- HTTP status
- 200
- Redirects
- https://637.net.cn → http://www.637.net.cn/
- Scanned
- Aug 24, 2026, 1:15 PM
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Frequently asked questions about 637.net.cn
- What is 637.net.cn?
- 637.net.cn is a website. It describes itself as “六三七】是面向装修行业的综合型黄页门户网站，也是国内起步较早、覆盖范围广泛的装修行业核心门户之一。…”.
- What technology does 637.net.cn use?
- 637.net.cn is built with Nginx.
- Is 637.net.cn secure?
- 637.net.cn did not present a TLS certificate and sets 0 of 6 recommended security headers.
- Is 637.net.cn protected against email spoofing?
- 637.net.cn does not receive email, but does not fully block others from sending mail in its name.
- How does 637.net.cn compare with similar sites?
- 637.net.cn scores higher overall than 3% of the 163,243 sites we have scanned.
- What is 637.net.cn's overall score?
- 637.net.cn has an overall SiteGraph score of 54/100, combining SEO (55), performance (80), security (35) and accessibility (45).
Open Graph & Twitter