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concert.io

Concert.io

Last scanned Jul 26, 2026, 5:17 AM · 1 view

91

Overall score

Excellent

Summary

Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. This website is hosted on Fastly. SEO is good (85/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.

Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.

United States
Hosted on Fastly

Top issues to fix

4 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

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

  • Missing X-Frame-Options header

    Security

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

  • Multiple H1 headings found

    SEO

    Keep a single H1 per page and demote the others to H2/H3.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

85

SEO

2 issue(s) found

100

Performance

18 ms

80

Security

HTTPS & header checks

100

Accessibility

0 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.

Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.

Contact

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

Meta tags

Title
Concert.io
Description
Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.
Canonical
https://concert.io/
Language
en
Charset
utf-8
Viewport
width=device-width
Robots meta
max-image-preview:large
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Concert.io
og:description
Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.
og:type
website
og:url
https://concert.io/

Twitter Card

twitter:card
summary_large_image
twitter:title
Concert.io
twitter:description
Concert by Vox Media is a publisher‑led marketplace with best-in-class creative formats. The safe and trusted way to advertise across the open web.

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider
Fastly
CDN provider
Fastly
IP address
151.101.1.91
ASN
AS54113 (FASTLY - Fastly, Inc., US)

DNS records

TypeValue
A
  • 151.101.1.91
  • 151.101.65.91
  • 151.101.193.91
  • 151.101.129.91
AAAA—
MX
  • alt1.aspmx.l.google.com
  • alt4.aspmx.l.google.com
  • alt3.aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • aspmx.l.google.com
TXT
  • google-site-verification=cmQFsLVrJYGA_Ekuobuk5yVTw0kBxArAtIF5Sy_JydA
  • google-site-verification=7RdQzkSA6nkPL9pxzrcShaUYEFRSHrhLF-aa8P9iIlg
  • ic8h89r4jsdfl8qp0b95gqfrok
  • v=spf1 include:_spf.google.com include:servers.mcsv.net include:sendgrid.net ~all
NS
  • ns-1181.awsdns-19.org
  • ns-176.awsdns-22.com
  • ns-1659.awsdns-15.co.uk
  • ns-857.awsdns-43.net
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
GlobalSign nv-sa
Subject
concert.io
Valid from
May 21, 2026
Valid to
Dec 6, 2026
Days until expiry
133
SAN domains
concert.io, *.concert.io

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 3 · H2 10 · H3 15

Links

6 internal · 8 external · 0 broken

Images

38 total · 0 missing alt

Scripts / Styles

9 scripts · 0 stylesheets

JS / CSS size

20.4 KB · 144 KB

Page size

269 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
0
sitemap.xml
Found
URLs in sitemap
9

SEO issues

  • Multiple H1 headings found
  • No structured data (JSON-LD) found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://concert.io
Final URL
https://concert.io
HTTP status
200
HTTP version
HTTP/2
Response time
13 ms
HTML size
269 KB
Redirect chain
https://concert.io

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does concert.io use?
We did not detect any specific technologies for concert.io in the latest scan.
Is concert.io secure (HTTPS)?
Yes. concert.io uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Dec 6, 2026.
Who hosts concert.io?
concert.io is hosted on Fastly, behind Fastly CDN.
What is concert.io's SEO score?
concert.io scored 85/100 for SEO in the latest analysis (great).
What is concert.io's overall website score?
concert.io has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.