What powers 
nucc.org?
Last seen Sep 2026 · 17 technologies across 13 categories
CMS
Font scripts
Hosting
JavaScript frameworks
JavaScript libraries
Miscellaneous
Operating systems
PaaS
Programming languages
UI frameworks
Web frameworks
Web servers
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 robots.txt appeared
- Sep 2026 * added to robots.txt
- Sep 2026 * removed from robots.txt
- Aug 2026 robots.txt removed
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| nucc | #1 | 300 |
| 1500 | #12 | 250 |
| hcfa 1500 | #3 | 230 |
| taxonomy code search | #4 | 160 |
| taxonomy code lookup | #4 | 120 |
| cms 1500 form | #13 | 53 |
| how to fill out a cms 1500 form | #1 | 52 |
| taxonomy provider | #2 | 42 |
| rendering provider | #3 | 38 |
| what does referring provider mean | #1 | 33 |
| what is a taxonomy code for a provider | #1 | 27 |
| hcfa 1500 form pdf | #9 | 24 |
| how to fill out hcfa 1500 | #1 | 21 |
| how to fill out cms 1500 form | #2 | 21 |
| list of taxonomy codes | #4 | 20 |
| taxonomy list | #4 | 17 |
| ordering provider | #3 | 17 |
| medical doctor specialties | #91 | 17 |
| how do i fill out a cms 1500 form | #3 | 17 |
| how to fill out a health insurance claim form | #2 | 17 |
| what is nucc | #1 | 15 |
| nucc taxonomy | #3 | 15 |
| 1500 claim form instructions | #1 | 15 |
| nucc taxonomy code | #3 | 14 |
| health insurance claim form 1500 | #5 | 14 |
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
No AI crawlers blocked
Audience
- 81% desktop
- 19% phone
United States
Pakistan
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.34 / 10 · ranked #179,581 of all domains
139 referring domains · OpenPageRank
Search traffic
2,400 est. monthly organic visits (US)
1,262 keywords in Google's top 30
Core Web Vitals
| LCP | 1.1 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United Kingdom)
- Weight: 0.3 MB · 30 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Registered May 1997 (29 years) via GoDaddy.com, LLC, renews May 2027
- Hosted on DigitalOcean (64.227.82.69)
- DNS: GoDaddy DNS
- Email: Mailgun
- Email security: SPF (soft fail), DMARC reject
- SSL: DigiCert, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 2,229,878, 4 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| nucc.org | 12 |
| www.nucc.org | 12 |
| taxonomy.nucc.org | 9 |