Stack Lookup
Get a free key

Domain answer

at21.jp

26

live countable technologies on this host, of 34 live detections. Last looked 1 Sept 2026.

fresh1 Sept 2026|first crawled 29 Apr 2020|HTTP 200|root domain

After 21 Co., Ltd. is a Japanese software company engaged in web marketing consulting, including website development, internet advertising, and website operation. The company provides contract and on-site staffing services for large-scale enterprises, supporting clients with tailored solutions and operational process standardization.

What at21.jp runs

Technologies with their datesof 34 live detections on this hostverified 1 Sept 2026

Technology
Category
First verified
Last verified
Seen
Version
2026-09-01
2026-09-01
x1
none seen
2025-12-26
2026-09-01
x3
none seen
2025-05-28
2026-09-01
x4
none seen
2025-05-28
2026-09-01
x4
none seen
2025-05-28
2026-09-01
x4
2.9.390
2026-09-01
2026-09-01
x1
none seen
2020-04-29
2026-09-01
x5
none seen
2025-05-28
2026-09-01
x4
none seen
2020-04-29
2026-09-01
x5
none seen
2025-05-28
2026-09-01
x4
none seen
2026-09-01
2026-09-01
x1
none seen
2025-05-28
2026-09-01
x4
0.8.9
2026-09-01
2026-09-01
x1
none seen
2026-09-01
2026-09-01
x1
none seen
2026-09-01
2026-09-01
x1
none seen
2026-09-01
2026-09-01
x1
none seen
2025-12-26
2026-09-01
x3
none seen
2025-05-28
2026-09-01
x4
none seen
AWS Certificate Manager2026-09-01TLS and Certificatesx1
Amazon Web Services2026-09-01Hosting and Cloud Providersx3
Apache HTTP Server2026-09-01Web Serversx4
BowNow2026-09-01Marketing Automationx4
DoubleClick Floodlight2026-09-01Retargeting and Attributionx4
Facebook Pixel2026-09-01Retargeting and Attributionx4
Font Awesome2026-09-01Media and Assetsx1
Google Analytics2026-09-01Web Analyticsx5
Google Call Conversion Tracking2026-09-01Retargeting and Attributionx3
Google Campaign Manager 3602026-09-01Advertisingx4
Google Tag Manager2026-09-01Tag Managementx5
Google Universal Analytics2026-09-01Web Analyticsx4
Microsoft 3652026-09-01Productivity and Email Suitesx1
Microsoft Clarity2026-09-01Web Analyticsx4
Mieruca2026-09-01SEOx1
MySQL2026-09-01Databases and Data Engineeringx1
PHP2026-09-01Programming Languages and Runtimesx1
Piwik PRO Core2026-09-01Web Analyticsx1
Ptengine2026-09-01Web Analyticsx3
Twitter Ads2026-09-01Advertisingx4

20 of 26 live countable"Seen" is the number of snapshots the detection was verified in

6 more live countable technologies on this host, with their dates
Technology
Category
First verified
Last verified
Seen
Version
2026-09-01
2026-09-01
x1
none seen
2026-09-01
2026-09-01
x1
none seen
2025-05-28
2026-09-01
x4
none seen
2025-05-28
2026-09-01
x4
3.32.2
2026-09-01
2026-09-01
x1
none seen
2025-05-28
2026-09-01
x4
none seen
8 web standards present on this host, not counted

CSS, HSTS, HTML, HTML5, JavaScript, Open Graph, Priority Hints, WebP

17 technologies seen on earlier snapshots and missing from the latest one, kept with their last verified date
Technology
Category
First verified
Last verified
Hosting and Cloud Providers
2026-02-22
2026-02-22
Hosting and Cloud Providers
2025-12-26
2026-02-22
JavaScript Libraries
2025-05-28
2026-02-22
JavaScript Libraries
2025-12-26
2026-02-22
Build and Developer Tools
2020-04-29
2020-04-29
Social and Content
2020-04-29
2020-04-29
Media and Assets
2020-04-29
2026-02-22
Web Analytics
2025-05-28
2026-02-22
Advertising
2025-05-28
2026-02-22
JavaScript Libraries
2020-04-29
2025-05-28
JavaScript Libraries
2020-04-29
2020-04-29
JavaScript Libraries
2020-04-29
2020-04-29
Web Servers
2020-04-29
2020-04-29
JavaScript Libraries
2025-05-28
2026-02-22
JavaScript Libraries
2020-04-29
2026-02-22
JavaScript Libraries
2025-05-28
2026-02-22
UI Frameworks and Components
2020-04-29
2020-04-29

Resolved company

After 21 Co., Ltd.

CategoryTech Companies
Industrymostly 541613 in 54 Professional, Scientific, and Technical Services (50.0%)
Also561320 in 56 Administrative and Support and Waste Management and Remediation Services (30.0%)
HQ13, Japan
Employeesover 1,000
Veridion IDRUVV7GGEYVAAD5FI

What After 21 Co., Ltd. is classified as

541613 in Professional, Scientific, and Technical Services500
561320 in Administrative and Support and Waste Management and Remediation Services300
541511 in Professional, Scientific, and Technical Services200

Share of the entity's activity3 codes, heaviest first, per milleverified 1 Sept 2026

The 3 codes in this chart
CodeShareScore
54161350.0%1.00
56132030.0%1.00
54151120.0%1.00

Open as a segment

Companies running core-js, jsDelivr, reCAPTCHA, the 3 least common technologies on this host. Counting is free; change the set on the segment page.

/companies/tech-core-js/tech-jsdelivr/tech-recaptcha

Count them, free