What powers sdkrashen.com?

Last seen Aug 2026 · 3 technologies across 3 categories

Programming languages

PHP
since Sep 2021

Security

reCAPTCHA
since Apr 2019

Web Servers

Apache HTTP Server
since Dec 2016

AI Crawlers

No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.

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

See who blocks each AI crawler across the web

Top search keywords

KeywordPositionEst. monthly visits
second language acquisition #7 1,500
stephen krashen #2 260
krashen #2 260
second language acquisition #23 130
second language acquisition definition #16 95
comprehensible input #8 57
krashen comprehensible input #1 43
stephen krashen comprehensible input #1 40
principles and practice #1 33
define morphology in language #85 31
stephen krashen second language acquisition #1 27
natural approaches #3 25
paradoxically synonym #55 25
paradoxically synonym #55 25
acculturation def #65 25
1982 #45 25
define acculturation #95 25
immerse synonym #58 23
principles and practice in second language acquisition krashen #1 21
principles and practice in second language acquisition #1 21
indebted definition #70 21
indebted define #82 21
principle and practice #2 18
theory vs hypothesis #62 17
theory vs hypothesis #62 17

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 robots.txt, all AI crawlers allowed

Full breakdown

Open Page Rank

5.40 / 10 · ranked #171,609 of all domains

287 referring domains · OpenPageRank

Search traffic

4,000 est. monthly organic visits (US)

1,460 keywords in Google's top 30

Page

  • Weight: 0.3 MB · 11 requests

Homepage as crawled by the HTTP Archive, Sep 2026.

Infrastructure

  • Hosted on TOTALCHOICE-HOSTING (208.76.80.81)
  • DNS: snhdns.com
  • Email: sdkrashen.com
  • Email security: no SPF record, no DMARC record
  • SSL: Let's Encrypt, RSA 2048, expires Nov 2026
  • Common Crawl link graph: rank 65,604, 2 hosts

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

Subdomains

HostTechs
sdkrashen.com 3
www.sdkrashen.com 3

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