indexo.dev

calca.io

.io crawl

First seen 2026-04-21 · Last seen 2026-05-11 · ok HTTP/1.1 200 403 ms crawled 2026-05-14

US · 198.185.159.144 · AS53831 Squarespace, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Calca - The Text Editor that Loves Math
Description
Calca is an advanced symbolic calculator for iOS, OS X, and Windows that's as easy to use as a text editor.
Language
en-US
Canonical
http://calca.io

Open Graph

url
http://calca.io
title
Calca - The Text Editor that Loves Math
site name
Calca - The Text Editor that Loves Math

Technology

Server
Squarespace
CMS
Squarespace
Analytics
  • Google Tag Manager

Third-party hosts loaded (5)

  • images.squarespace-cdn.com×40
  • assets.squarespace.com×12
  • static1.squarespace.com×4
  • definitions.sqspcdn.com×2
  • www.googletagmanager.com×1

Contact

Address
4556 University Way NE #220 Seattle, WA 98105 USA

DNS records live

NS
  • ns1.iwantmyname.net
  • ns2.iwantmyname.net
  • ns3.iwantmyname.net
  • ns4.iwantmyname.net
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 15 gi6ltgsnna4bq73qdmmdnzz7vsmurotwgdujxkb53lhnvux62ofq.mx-verification.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com

Email authentication weak

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-03-16 to 2026-06-14
Expires in 27 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 55/100 Checked live page: https://calca.io/

present
  • strict-transport-security
  • x-content-type-options
findings
  • short HSTS max-age
  • missing Content Security Policy
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff
strict-transport-security
max-age=0

Links to (2)

Linked from (1)