Domain profile · Jun–Aug 2026Status · Live

sfr-software.com↗

CalcTape – the paper tape calculator that keeps track

#15,858,107Link-graph rank

Top 13.2%of 119.7M domains

PageRank #43,353,662By links pointing at it

2 hostsSubdomains in the link graph

About

The calculator that keeps track: long calculations stay clear and correctable. For Windows, Mac, iPhone, iPad, Android & web – free in the browser.

Technologies

Backend & data · 1Infrastructure & security · 1

Apache HTTP ServerHSTS

Site details

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