# What does Subnet Calc use?

Subnet Calc (subnetcalc.com) shows public evidence of 8 tools, according to runsonwhat (last checked 2026-10-23).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft Azure](https://www.runsonwhat.com/reverse/azure) | Hosting & Cloud | Custom domain, DNS records |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Font Awesome](https://www.runsonwhat.com/reverse/fontawesome) | Media & UI | Website code |  |
| [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Freshdesk](https://www.runsonwhat.com/reverse/freshdesk) | Support & Docs | Custom domain |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records |  |
| [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records |  |

## FAQ

### What tools does Subnet Calc use?

As of October 2026, runsonwhat has found 8 tools at Subnet Calc (subnetcalc.com) in public records. Edge & Hosting: Microsoft Azure. Application: Font Awesome and Next.js. Data & Observability: Google Tag Manager. Go-to-market: Freshdesk. Company Ops: Microsoft 365 and SendGrid. Last checked October 23, 2026.

### What cloud does Subnet Calc run on?

Subnet Calc uses Microsoft Azure for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Microsoft Azure through a subdomain that points at Microsoft Azure and DNS records. Microsoft Azure is used by 46,695 companies runsonwhat tracks.

### What email provider does Subnet Calc use?

Subnet Calc uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is used by 710,143 companies runsonwhat tracks.

### What does Subnet Calc use for customer support?

Subnet Calc uses Freshdesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Freshdesk through a subdomain that points at Freshdesk. Freshdesk is used by 12,511 companies runsonwhat tracks.

### What analytics tools does Subnet Calc use?

Subnet Calc uses Google Tag Manager for analytics, according to runsonwhat (October 2026). runsonwhat found Google Tag Manager through Google Tag Manager code on subnetcalc.com. Google Tag Manager is used by 501,916 companies runsonwhat tracks.

### Does Subnet Calc use Font Awesome?

Yes. runsonwhat found Font Awesome at Subnet Calc through Font Awesome code on subnetcalc.com. Font Awesome is a Media & UI tool used by 424,346 companies runsonwhat tracks.

### How does runsonwhat know what Subnet Calc uses?

runsonwhat reads public records only. Of the 8 tools at Subnet Calc, 3 were found through code on subnetcalc.com, 2 through DNS records, 2 through subdomains that point at the vendor and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and subnetcalc.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/subnetcalc.com (updated October 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.