What powers 
onlinesim.io?
Last seen Oct 2026 · 16 technologies across 10 categories
Advertising
Analytics
CDN
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Tag managers
UI frameworks
Web frameworks
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 Nov 2026.
- robots.txt found
- llms.txt found
- llms-full.txt found
- ai.txt not found
- Aug 2026 llms.txt appeared
- Aug 2026 llms-full.txt appeared
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| sim online | #1 | 1,300 |
| america free phone number | #1 | 1,100 |
| virtual number free | #2 | 320 |
| free virtual phone number | #5 | 310 |
| free virtual number | #2 | 310 |
| free virtual number for sms | #2 | 260 |
| temporary phone number | #13 | 240 |
| online sms | #1 | 220 |
| temp number | #15 | 170 |
| virtual phone number free | #6 | 170 |
| virtual phone number sms | #2 | 160 |
| sms phone number | #3 | 160 |
| virtual number for telegram | #6 | 120 |
| free sms number | #6 | 120 |
| sms activate | #12 | 110 |
| free phone number for verification | #9 | 99 |
| free virtual phone number sms | #3 | 78 |
| sms online | #7 | 74 |
| sim sms | #1 | 73 |
| virtual sms | #4 | 66 |
| fake sms number | #3 | 57 |
| virtual sms phone number | #2 | 52 |
| online phone number | #11 | 49 |
| free phone number | #47 | 49 |
| free temporary phone number | #11 | 49 |
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
Standards: llms.txt, llms-full.txt
Audience
- 75% phone
- 24% desktop
- 1% tablet
India
Germany
Nigeria
France
Russia
United Kingdom
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.29 / 10 · ranked #90,039 of all domains
433 referring domains · OpenPageRank
Search traffic
8,800 est. monthly organic visits (US)
2,922 keywords in Google's top 30
Core Web Vitals
| LCP | 2.1 s |
| INP | 275 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: English (United States)
- Weight: 1.5 MB · 98 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on QRATOR-SW Qrator Labs CZ s.r.o. (185.104.210.36)
- DNS: Cloudflare DNS
- Email: no MX record returned
- Email security: DMARC monitor only
- SSL: GlobalSign, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 2,236,130
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Google Font API Sep 2026