callstack.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 5297 ms crawled 2026-05-18

US · 198.202.211.1 · AS209242 Cloudflare London, LLC

Reputation 100/100

Classifying

HTML metadata

Title: Callstack | Expert React & React Native Development Services | Meta Partners
Description: Callstack: Expert React & React Native development. Ship cross-platform apps faster with core contributors trusted by leading brands.
Language: en

Open Graph

title: Callstack | Expert React & React Native Development Services | Meta Partners
description: Callstack: Expert React & React Native development. Ship cross-platform apps faster with core contributors trusted by leading brands.

Technology

CDN: Cloudflare

Third-party hosts loaded (6)

cdn.prod.website-files.com×210
cdn.jsdelivr.net×3
app.optibase.io×1
d3e54v103j8qbb.cloudfront.net×1
js.hsforms.net×1
unpkg.com×1

Social

Contact

Phone

Address

Prosta 36, 53-508, Wrocław, PL

Registration

Registrar

1API GmbH

Created

2003-05-24

Expires

2026-05-24 5 days left

Updated

2025-11-23

Name servers

joel.ns.cloudflare.com
zita.ns.cloudflare.com

DNS records live

NS

joel.ns.cloudflare.com
zita.ns.cloudflare.com

MX

1 aspmx.l.google.com
10 aspmx2.googlemail.com
10 aspmx3.googlemail.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

Show 16 TXT records

linkedin-site-verification=eb1e88c1-9dc8-4c6b-aa2d-7327a804a787
klaviyo-site-verification=Tq8Ygb
atlassian-domain-verification=Er82PV/Dcz37/3uaREksnIYpEjAfTQQLjJa2XHIvYUlFxVoFmKhVgNd/xNSaxutv
1password-site-verification=F5J3HVLE5VFBBKM7LWVBE4PTR4
google-site-verification=BnAngYuvDAbyMl8mbKsb1ZiN-0Wl3mMQQzGGwHfx99Q
slack-domain-verification=q0NCuoSn9SEtyZFydKxPvD59HAiPjpaCtcL7rmnp
notion-domain-verification=1LoYl2e22Zkc0kV4ufJdRHvGrQvcWrsxz7r2Ie2bgQ4
google-site-verification=V40TPgy9HWk6l3hTEtoK6XdukNUJssAFK8Z0VuO5TyM
anthropic-domain-verification-fshpxx=jQt7Egw5ArVX9dTL5lQrQU52i
gradle-verification=CS1NEB73R5A6KCCSHLUL50LHUFTEG
ahrefs-site-verification_db3946c7c4ecb9f20a780a7c00e9a38fafaadaa56812e2528677e7a5a0a0c6f5
cursor-domain-verification-zfeds4=gM08xWe8i6bzqImLKGQZZqqKO
miro-verification=1856b9c3f904ed746108f224403c6b6de2cbd697
yu7z9tywme
gradle-verification=K24TPI8JAI9HM61QCJBO8EI2NUBRS
openai-domain-verification=dv-2XvBlb5F2fXFdCBiPuc5PIw3

Email authentication strong

SPF

v=spf1 include:g8cj3xuy44.powerspf.com -all

strict (-all)

DMARC

v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; rua=mailto:h6yjmkggai@rua.powerdmarc.com; ruf=mailto:h6yjmkggai@ruf.powerdmarc.com; pct=100; fo=0:1:d:s;

policy: reject (enforced) · sp=reject

DKIM

google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw27OL47gPF+Oj832ydBnGeV/xZLadTFRhLJTltlC9SQhI6GUvK+JDWidizEHW5t/qkyxMhHLS6yAAf…
k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqNlItbvheS5xZobbis+C92gAibyAdu1rexlNeS9LKWEM6QyC80khowf/nSNVb+hZ3JAF+372p3kqJ8Hc7xhdhdor4Tfu…
k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…

selectors probed

Certificate (current)

WE1

from 2026-05-18 to 2026-08-16

Expires in 89 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.callstack.com/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=31536000