21-school.ru

https://21-school.ru· First analyzed 25 May 2026· Updated 25 May 2026

This site uses bot protection

The website blocked automated page access (e.g. Cloudflare Turnstile). Only DNS-based modules could be analyzed — hosting, SSL, email infrastructure, and domain info are shown below. Technology stack, SEO, and other page-content modules are unavailable for this site.

Hosting Provider

Servicepipe LLC

IP Address

91.221.165.183

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS201706

Organization

Servicepipe LLC

Nameservers

ns1.21-school.ru.ns3.21-school.ru.ns2.21-school.ru.

Security Score

71%Good

HTTPS

No WAF

165d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.10.2025

Valid Until

07.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (5)

*.21-school.ruautodiscover.21-school.rumail.21-school.ruowa.21-school.ru21-school.ru

SHA-256 Fingerprint

AE:C6:7D:2A:2D:97:A7:CB:2B:AB:4C:32:8E:8B:76:C2:EE:37:76:D4...

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Email Infrastructure

Yandex Mail

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mx.yandex.net

Domain Information

21-school.ru

Domain Age

8 years

Created

16.05.2018

Expires

16.05.2027

Registrar

RU-CENTER-RU

DNSSEC

Not Enabled

Website Identity

21-school.ru

8 years old

Location detected: 🇷🇺 Russiavia tld

RU-CENTER-RU📧 Yandex Mail