What powers surs.org?
Last seen Oct 2026 · 29 technologies across 21 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Marketing automation
Miscellaneous
Mobile frameworks
PaaS
Performance
Programming languages
Retargeting
Reverse proxies
Security
Tag managers
Video players
Web frameworks
Webmail
Widgets
WordPress plugins
AI Crawlers
Blocks 23 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
- Applebot Blocked
- Claude-SearchBot Blocked
- OAI-SearchBot Blocked
- PerplexityBot Blocked
- PetalBot Blocked
- YouBot Blocked
User-request fetchers
- ChatGPT-User Blocked
- Claude-User Blocked
- meta-externalfetcher Blocked
- MistralAI-User Blocked
- Perplexity-User Blocked
The other 10 AI crawlers we track are not mentioned and stay allowed by default.
- robots.txt found
- llms.txt not found
- ai.txt not found
Content Signals:
search=yes ai-train=no declared in robots.txt
- Nov 2026 llms.txt removed
- Nov 2026 ccbot added to robots.txt
- Nov 2026 bytespider added to robots.txt
- Nov 2026 claude-searchbot added to robots.txt
- Nov 2026 claude-user added to robots.txt
- Nov 2026 chatgpt-user added to robots.txt
AI Crawlers
23 of 33 AI crawlers blocked
Standards: Content Signals
Audience
- 80% desktop
- 20% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #320,941 of all domains
57 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 2.1 MB · 97 requests
- WordPress theme: divi · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- State Universities Retirement System
- Founded: 1941
- Country: United States
- Profiles: Facebook, X, LinkedIn, Instagram
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Registered Feb 2000 (26 years) via Cloudflare, Inc., renews Feb 2031
- Hosted on Cloudflare (104.18.26.239, IPv6)
- DNS: Cloudflare DNS
- Email: Mimecast
- Email security: SPF (soft fail), DMARC reject, DNSSEC signed
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 173,520, 5 hosts
- Verified with: Apple Business, Cisco, Sage Intacct
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| surs.org | 25 |
| www.surs.org | 16 |
| webserver.surs.org | 3 |