kn51.ru ▶ Kn51.ru

Kn51.ru | Key Trends

Online Status

Offline

Server IP address resolved: No
Http response code: None
Last Checked: 12/08/2025

Kn51.ru attracts 1,548 unique visitors daily, generating 3,097 pageviews. The estimated value of kn51.ru is 2,311 USD. Each visitor views approximately 2.14 pages on average.

Kn51.ru is hosted by SpaceWeb Ltd. Check out other websites hosted by SpaceWeb Ltd.

See the list of other websites hosted by SpaceWeb Ltd.

Kn51.ru is registered with the .RU top-level domain. Explore additional websites within the .RU zone.

A recent examination on (September 23, 2024), indicates that kn51.ru has an expired SSL certificate issued by Google Trust Services (expired on December 18, 2024). Click the "Refresh" button in the Safety Information section for updated SSL details. See the list of websites using SSL certificates issued by Google Trust Services.

According to Google Safe Browsing, Symantec and Web of Trust kn51.ru appears to be a safe domain.

Based on Google's Mobile-Friendly test, kn51.ru is optimized for mobile and tablet devices, although the web page loading speed could be improved.

Kn51.ru | General Site Information

not found

Kn51.ru | Safety and Security Details

Overview

Last Updated: 12/08/2025

Unknown status.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 04/02/2025

kn51.ru is safe.

Norton ConnectSafe evaluates kn51.ru for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 12/08/2025

Unknown status.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

kn51.ru is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 03/02/2021

kn51.ru is safe.

McAfee assesses kn51.ru for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze kn51.ru for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/11/2019

kn51.ru child safety is very good.

The WOT calculates reputation of the kn51.ru. This reputation system receives ratings from users and information from third-party sources, assesses the kn51.ru for safety features and confirms, whether kn51.ru is suitable for children.

Kn51.ru | SSL Certificate Information

SSL Checker Tool

Domain	kn51.ru
Issuer Organization	Google Trust Services
Issuer	WE1
Algorithm	ecdsa-with-SHA256
Valid form	09/19/2024
Expiration	12/18/2024
Signed	Certificate is not self signed
Additional Domains	kn51.ru *.kn51.ru

Kn51.ru | Server and Hosting Details

Server Location

Geolocation Tool

Kn51.ru ASN Information

ASN Lookup Tool

ASN ID: 44112
ASN Title: SpaceWeb Ltd

Last Update: 09/09/2025

ASN Whois

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.

% Information related to 'AS40960 - AS45055'

as-block: AS40960 - AS45055
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by: RIPE-NCC-HM-MNT
created: 2015-12-10T09:19:56Z
last-modified: 2015-12-10T09:19:56Z
source: RIPE

% Information related to 'AS44112'

% Abuse contact for 'AS44112' is 'abuse@sweb.ru'

aut-num: AS44112
as-name: SWEB-AS
org: ORG-SW40-RIPE
import: from AS48287 accept ANY
export: to AS48287 announce AS44112
import: from AS25462 accept ANY
export: to AS25462 announce AS44112
default: to AS25462
admin-c: RN331-RIPE
tech-c: RN331-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: RUNIC-MNT
created: 2007-11-19T15:29:13Z
last-modified: 2016-04-14T09:29:47Z
source: RIPE
sponsoring-org: ORG-JR15-RIPE

organisation: ORG-SW40-RIPE
org-name: SpaceWeb Ltd
org-type: OTHER
address: Russian Federation
address: 196084, Saint-Petersburg
address: Tsvetochnaya ul., 18
abuse-c: AC32142-RIPE
mnt-ref: RUNIC-MNT
mnt-by: RUNIC-MNT
created: 2015-06-01T11:08:11Z
last-modified: 2017-10-30T14:35:49Z
source: RIPE # Filtered

role: RU-NIC NOC
address: JSC "RU-CENTER"
address: 123308, Moscow, Russian Federation
address: 3 Khoroshevskaya, 2-1
phone: +7 495 737 0601
abuse-mailbox: abuse@nic.ru
tech-c: EVB3-RIPE
admin-c: EVB3-RIPE
tech-c: NIKS-RIPE
tech-c: SMS-RIPE
nic-hdl: RN331-RIPE
mnt-by: RUNIC-MNT
created: 2009-07-13T13:17:56Z
last-modified: 2017-12-07T16:57:27Z
source: RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.91.2 (ANGUS)

Kn51.ru | Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

% TCI Whois Service. Terms of use:
% https://tcinet.ru/documents/whois_ru_rf.pdf (in Russian)
% https://tcinet.ru/documents/whois_su.pdf (in Russian)

domain: KN51.RU
nserver: isla.ns.cloudflare.com.
nserver: lex.ns.cloudflare.com.
state: REGISTERED, DELEGATED, UNVERIFIED
org: OAO "Kolskaya GMK"
taxpayer-id: 5191431170
registrar: RU-CENTER-RU
admin-contact: https://www.nic.ru/whois
created: 2013-04-30T07:43:20Z
paid-till: 2023-04-30T08:43:20Z
free-date: 2023-05-31
source: TCI

Last updated on 2022-11-10T12:21:30Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
kn51.ru	77.222.56.143	600

Host	MX Record	Priority	TTL
kn51.ru	mx2.spaceweb.ru	20	600
kn51.ru	mx1.spaceweb.ru	10	600

Host	NS Record	TTL
kn51.ru	ns4.spaceweb.pro	600
kn51.ru	ns1.spaceweb.ru	600
kn51.ru	ns2.spaceweb.ru	600
kn51.ru	ns3.spaceweb.pro	600

Host	TXT Record	TTL

ns1.spaceweb.ru
TTL: 600
Email address: dns1.sweb.ru
Serial: 2014061024
Refresh: 28800
Retry: 7200
Expire: 604800
Minimum: 600

Kn51.ru | HTML Validation Report

HTML Validation Tool

Errors

Legacy doctype. Expected “<!DOCTYPE html>”.

Attribute “xmlns:content” not allowed here.

Attribute “xmlns:dc” not allowed here.

Attribute “xmlns:foaf” not allowed here.

Attribute “xmlns:og” not allowed here.

Attribute “xmlns:rdfs” not allowed here.

Attribute “xmlns:sioc” not allowed here.

Attribute “xmlns:sioct” not allowed here.

Attribute “xmlns:skos” not allowed here.

Attribute “xmlns:xsd” not allowed here.

When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.

The “version” attribute on the “html” element is obsolete. You can safely omit it.

The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.

The “width” attribute on the “td” element is obsolete. Use CSS instead.

Bad value “8aac24” for attribute “rel” on element “a”: The string “8aac24” is not a registered keyword.

Bad value “ff0054” for attribute “rel” on element “a”: The string “ff0054” is not a registered keyword.

Bad value “1e8bc3” for attribute “rel” on element “a”: The string “1e8bc3” is not a registered keyword.

Bad value “949494” for attribute “rel” on element “a”: The string “949494” is not a registered keyword.

Bad value “e65c00” for attribute “rel” on element “a”: The string “e65c00” is not a registered keyword.

Bad value “2e9099” for attribute “rel” on element “a”: The string “2e9099” is not a registered keyword.

Bad value “dcd400” for attribute “rel” on element “a”: The string “dcd400” is not a registered keyword.

Bad value “319808” for attribute “rel” on element “a”: The string “319808” is not a registered keyword.

Bad value “41d008” for attribute “rel” on element “a”: The string “41d008” is not a registered keyword.

Bad value “e34892” for attribute “rel” on element “a”: The string “e34892” is not a registered keyword.

Bad value “374782” for attribute “rel” on element “a”: The string “374782” is not a registered keyword.

Bad value “82375a” for attribute “rel” on element “a”: The string “82375a” is not a registered keyword.

Bad value “4e4e4e” for attribute “rel” on element “a”: The string “4e4e4e” is not a registered keyword.

Bad value “e7df00” for attribute “rel” on element “a”: The string “e7df00” is not a registered keyword.

Bad value “840000” for attribute “rel” on element “a”: The string “840000” is not a registered keyword.

Bad value “707070” for attribute “rel” on element “a”: The string “707070” is not a registered keyword.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Element “ul” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Attribute “datatype” not allowed on element “span” at this point.

Attribute “about” not allowed on element “span” at this point.

“&” did not start a character reference. (“&” probably should have been escaped as “&”.)

Attribute “about” not allowed on element “div” at this point.

Attribute “datatype” not allowed on element “h2” at this point.

End tag “h4” seen, but there were open elements.

Unclosed element “span”.

The “align” attribute on the “td” element is obsolete. Use CSS instead.

The “for” attribute of the “label” element must refer to a non-hidden form control.

Warnings

Attribute with the local name “xmlns:content” is not serializable as XML 1.0.

Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:foaf” is not serializable as XML 1.0.

Attribute with the local name “xmlns:og” is not serializable as XML 1.0.

Attribute with the local name “xmlns:rdfs” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioct” is not serializable as XML 1.0.

Attribute with the local name “xmlns:skos” is not serializable as XML 1.0.

Attribute with the local name “xmlns:xsd” is not serializable as XML 1.0.

The “main” role is unnecessary for element “main”.

Kn51.ru | Desktop Performance Insights

Last tested: 04/22/2017

Desktop

Desktop Speed

54%

Optimize images

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Reduce server response time

Leverage browser caching

Minify JavaScript

Minify CSS

Desktop Resource Breakdown

Total Resources	131
Number of Hosts	3
Static Resources	126
JavaScript Resources	24
CSS Resources	26

Kn51.ru | Mobile Performance Insights

Last tested: 04/21/2017

Mobile

Mobile Usability

65%

Use legible font sizes

Configure the viewport

Size tap targets appropriately

Size content to viewport

Mobile Speed

58%