What powers philadelphiabuildings.org?
Last seen Oct 2026 · 8 technologies across 6 categories
Analytics
CDN
JavaScript libraries
Miscellaneous
Programming languages
Web frameworks
AI Crawlers
Blocks 13 of 33 AI crawlers we track by name in its robots.txt. Checked Nov 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- Google-CloudVertexBot Blocked
- Google-Extended Blocked
- GoogleOther Blocked
- GPTBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
- PetalBot Blocked
The other 20 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
Content Signals:
search=yes ai-train=no declared in robots.txt
- Nov 2026 ccbot added to robots.txt
- Nov 2026 claude-web added to robots.txt
- Nov 2026 claudebot added to robots.txt
- Nov 2026 bytespider added to robots.txt
- Nov 2026 Content Signals changed
- Nov 2026 amazonbot added to robots.txt
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| byberry mental hospital location | #3 | 230 |
| philadelphia buildings | #1 | 200 |
| 30th street station | #47 | 170 |
| city of philadelphia city hall | #39 | 130 |
| 30th st station philadelphia | #25 | 95 |
| historic commission philadelphia | #2 | 78 |
| william strickland architect | #2 | 78 |
| steinberg dietrich hall | #7 | 74 |
| cottman ave and roosevelt blvd | #5 | 61 |
| winterthur estates | #52 | 57 |
| widener building | #1 | 52 |
| widener building philadelphia pa | #1 | 52 |
| ballinger | #12 | 50 |
| chester county pa historical society | #3 | 47 |
| germantown historical society philadelphia | #4 | 47 |
| philadelphia streets | #3 | 43 |
| julian abele | #5 | 43 |
| kendrick recreation center | #6 | 41 |
| st anthony of padua | #95 | 35 |
| frederick law olmsted | #35 | 34 |
| elfreth's alley | #31 | 31 |
| merion township pa | #74 | 31 |
| jefferson curtis building | #1 | 27 |
| philadelphia architects and buildings | #1 | 27 |
| 1518 walnut street philadelphia pa | #3 | 27 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
13 of 33 AI crawlers blocked
Standards: Content Signals
Audience
- 84% desktop
- 16% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.21 / 10 · ranked #228,373 of all domains
150 referring domains · OpenPageRank
Search traffic
4,600 est. monthly organic visits (US)
3,512 keywords in Google's top 30
Core Web Vitals
| LCP | 0.8 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- CDN: Cloudflare
- Weight: 0.3 MB · 22 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Philadelphia Architects and Buildings Project
- Founded: 2014
From Wikidata (CC0).
Infrastructure
- Registered Sep 2000 (26 years) via Cloudflare, Inc., renews Sep 2027
- Hosted on Cloudflare (104.21.1.100, IPv6)
- DNS: Cloudflare DNS
- Email: no MX record returned
- SSL: Let's Encrypt, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 537,334, 3 hosts
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Full technology history →
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Recent changes
- dropped IIS Jul 2026
- dropped Windows Server Jul 2026
- detected Cloudflare Jun 2026
- detected Cloudflare Browser Insights Jun 2026
- detected HTTP/3 Jun 2026