What powers j-bdb.com?

Last seen Aug 2026 · 16 technologies across 10 categories

Advertising

Google AdSense
since Mar 2020

Analytics

Google Analytics
since Mar 2020

CDN

cdnjs
since Nov 2021
Cloudflare
since May 2022
Google Hosted Libraries
since Feb 2022
jsDelivr
since Jul 2020

JavaScript frameworks

TanStack Start
since Aug 2026

JavaScript libraries

jQuery v3.4.1
since Mar 2020

Miscellaneous

HTTP/3
since Aug 2026
Open Graph
since Sep 2022
Popper v1.14.7
since Feb 2021

Security

Cloudflare Bot Management
since Aug 2026
reCAPTCHA
since Apr 2022

Tag managers

Google Tag Manager
since Mar 2020

UI frameworks

Bootstrap v4.3.1
since Mar 2020

Web servers

Nginx v1.22.1
since Apr 2020

AI Crawlers

Blocks 10 of 33 AI crawlers we track by name in its robots.txt. Checked Aug 2026.

Training crawlers

  • Bytespider Blocked
  • CCBot Blocked
  • ClaudeBot Blocked
  • GPTBot Blocked
  • meta-externalagent Blocked

Search and AI assistants

  • Amazonbot Blocked
  • Applebot Blocked
  • Claude-SearchBot Blocked
  • OAI-SearchBot Blocked
  • PerplexityBot Blocked

The other 23 AI crawlers we track are not mentioned and stay allowed by default.

  • robots.txt found
  • llms.txt not found
  • ai.txt not found

See who blocks each AI crawler across the web

AI Crawlers

10 of 33 AI crawlers blocked

Full breakdown

Audience

  • 51% phone
  • 49% desktop
  • Japan

Where the site's Chrome visitors come from, largest estimated audience first.

Open Page Rank

1.36 / 10 · ranked #7,901,193 of all domains

9 referring domains · OpenPageRank

Core Web Vitals

LCP1 s
INP50 ms
CLS0.55
TTFB500 ms

Real user p75, Chrome UX Report, Aug 2026.

Page

  • Language: Japanese
  • CDN: Cloudflare
  • Weight: 1.2 MB · 50 requests
  • Structured data: OpenGraph, Twitter Cards

Homepage as crawled by the HTTP Archive, Sep 2026.

Infrastructure

  • DNS: Cloudflare DNS
  • Email: no MX record returned
  • Email security: DMARC reject
  • SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
  • Common Crawl link graph: rank 12,685,634, 2 hosts

DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted

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