What technology does 1und1.de use?

1und1.de is built with WooCommerce, Nginx.

Is 1und1.de secure (HTTPS)?

Yes. 1und1.de uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Jan 3, 2027.

Hosting provider information for 1und1.de is not available yet.

What is 1und1.de's SEO score?

1und1.de scored 80/100 for SEO in the latest analysis (great).

What is 1und1.de's overall website score?

1und1.de has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.

Has 1und1.de's score changed over time?

1und1.de's overall score has declined by 1 point (from 88 to 87) since Jul 21, 2026.

1und1.de

1&1 Mobilfunk und Internet > Alles aus einer Hand

Last scanned Jul 29, 2026, 7:00 PM · 11 views

Overall score

Great

Summary

Die besten Angebote für Mobilfunk & Internet ➤ Günstige Tarife ✓ Handys & Tablets ✓ Highspeed Internet ✓ Top Service ➤ Jetzt bei 1&1 informieren!. This website uses Nginx. SEO is good (80/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (90/100). Top issue: No H1 heading found.

1&1 Telecommunication SE

Die besten Angebote für Mobilfunk & Internet ➤ Günstige Tarife ✓ Handys & Tablets ✓ Highspeed Internet ✓ Top Service ➤ Jetzt bei 1&1 informieren!

Elgendorfer Str. 57, Montabaur, Rheinland-Pfalz, 56410, DE

Top issues to fix

5 issues found · 1 high priority

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-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

3 issue(s) found

Performance

520 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Score history

-1 overall since Jul 21, 2026

Overall: 87
SEO: 80
Security: 90
Performance: 90
Accessibility: 90

Organization

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

1&1 Telecommunication SE

Die besten Angebote für Mobilfunk & Internet ➤ Günstige Tarife ✓ Handys & Tablets ✓ Highspeed Internet ✓ Top Service ➤ Jetzt bei 1&1 informieren!

de-de.facebook.com X (Twitter)xing.com LinkedIn pinterest.de YouTube

Contact

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

Phone: <%PHONE_EUE%><%PHONE_SUPPORT%>
Address: Elgendorfer Str. 57, Montabaur, Rheinland-Pfalz, 56410, DE

Meta tags

Title: 1&1 Mobilfunk und Internet > Alles aus einer Hand
Description: Die besten Angebote für Mobilfunk & Internet ➤ Günstige Tarife ✓ Handys & Tablets ✓ Highspeed Internet ✓ Top Service ➤ Jetzt bei 1&1 informieren!
Canonical: https://www.1und1.de/
Language: de
Charset: UTF-8
Viewport: width=device-width, initial-scale=1.0, maximum-scale=2.0, user-scalable=1, shrink-to-fit=no
Robots meta: index,follow
Manifest: https://www.1und1.de/_Resources/Static/Packages/ONEANDONE.RNodeTypes/1784897577/images/favicon-delivery/manifest.json?bust=4

Technologies

Detected frameworks, languages, and tools.

WooCommerce Nginx

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: DigiCert Inc
Subject: *.1und1.de
Valid from: Jun 19, 2026
Valid to: Jan 3, 2027
Days until expiry: 158
SAN domains: *.1und1.de, 1und1.de

Security headers

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

Compression: gzip · 3 cookie(s) observed

Content & assets

Headings

H1 0 · H2 5 · H3 0

Links

54 internal · 150 external · 20 broken

Images

151 total · 0 missing alt

Scripts / Styles

88 scripts · 1 stylesheets

JS / CSS size

29.8 KB · 11.8 KB

Page size

365 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

No H1 heading found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://1und1.de
Final URL: https://www.1und1.de/
HTTP status: 200
HTTP version: HTTP/2
Response time: 513 ms
HTML size: 365 KB
Redirect chain: https://1und1.de → https://www.1und1.de/

See something wrong on this report? Request a correction

Same technology stack

frosmo.com

AI-driven personalization strategies

wordpressnginxwoocommerce

HETZNER-AS - Hetzner Online GmbH, DE

cloudhosting.lv

IT Partner in Latvia: VPS, Servers, Hosting | CloudHosting

nginxmeta-pixelwoocommerce

AS-CLOUDHOSTING - CloudHosting SIA, LV

cesky-hosting.cz

Český hosting: webhosting a registrace domény

phpnginxwoocommerce

embs.org

Home - IEEE EMBS

wordpressnginxwoocommerce

i24.host

i24® MKB Hostingpartner

wordpressnginxphp

isku.com

ISKU | Toimistot, koulut, sairaalat ja kaikki julkiset tilat

wordpressnginxmeta-pixel

Frequently asked questions

What technology does 1und1.de use?: 1und1.de is built with WooCommerce, Nginx.
Is 1und1.de secure (HTTPS)?: Yes. 1und1.de uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Jan 3, 2027.
Who hosts 1und1.de?: Hosting provider information for 1und1.de is not available yet.
What is 1und1.de's SEO score?: 1und1.de scored 80/100 for SEO in the latest analysis (great).
What is 1und1.de's overall website score?: 1und1.de has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.
What company operates 1und1.de?: 1und1.de is operated by 1&1 Telecommunication SE. Die besten Angebote für Mobilfunk & Internet ➤ Günstige Tarife ✓ Handys & Tablets ✓ Highspeed Internet ✓ Top Service ➤ Jetzt bei 1&1 informieren!
Has 1und1.de's score changed over time?: 1und1.de's overall score has declined by 1 point (from 88 to 87) since Jul 21, 2026.