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SGSiteGraph

issn.org

ISSN |

Last scanned Jul 25, 2026, 8:25 PM · 2 views

75

Overall score

Fair

Summary

This website uses WordPress hosted on OVH - OVH SAS, FR. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance good (80/100). Top issue: Missing canonical link.

France
Hosted on OVH - OVH SAS, FR

Top issues to fix

8 issues found · 3 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

+2 more issues — details in the sections below.

70

SEO

4 issue(s) found

80

Performance

2.99 s

65

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

X (Twitter)

Contact

Email, phone, and address published on this site's own pages.

Source: https://www.issn.org/services/requesting-an-issn/contact-an-issn-national-centre/

Meta tags

Title
ISSN |
Description
 
Canonical
Language
en-US
Charset
UTF-8
Viewport
width=device-width
Robots meta
max-image-preview:large
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

WordPressjQueryApache

Hosting & CDN

Hosting provider
OVH - OVH SAS, FR
CDN provider
—
IP address
46.105.152.159
ASN
AS16276 (OVH - OVH SAS, FR)

DNS records

TypeValue
A
  • 46.105.152.159
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Gandi SAS
Subject
*.issn.org
Valid from
Feb 8, 2026
Valid to
Feb 12, 2027
Days until expiry
202
SAN domains
*.issn.org, issn.org

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 1 · H3 6

Links

55 internal · 4 external · 0 broken

Images

11 total · 0 missing alt

Scripts / Styles

75 scripts · 17 stylesheets

JS / CSS size

957 KB · 608 KB

Page size

88.5 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
1
sitemap.xml
Found
URLs in sitemap
-1

SEO issues

  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags

Accessibility issues

  • No H1 heading found

Careers

View careers page

This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.

Scan details

Requested URL
https://issn.org
Final URL
https://www.issn.org/
HTTP status
200
HTTP version
HTTP/1.1
Response time
2.99 s
HTML size
88.5 KB
Redirect chain
https://issn.org → https://www.issn.org/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does issn.org use?
issn.org is built with WordPress, jQuery, Apache.
Is issn.org secure (HTTPS)?
Yes. issn.org uses TLS 1.3 with a certificate issued by Gandi SAS, valid until Feb 12, 2027.
Who hosts issn.org?
issn.org is hosted on OVH - OVH SAS, FR.
What is issn.org's SEO score?
issn.org scored 70/100 for SEO in the latest analysis (fair).
What is issn.org's overall website score?
issn.org has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.
Is issn.org hiring?
issn.org has a careers page; check it directly for current openings.