21mm.ru Научно-популярный журнал «Машины и Механизмы»

Интернет-сообщество научно-популярного журнала «Машины и Механизмы», где читатели напрямую встречаются друг с другом, с редакцией, авторами и партнер...

21mm.ru Quick Summary

Status

Online

Server IP address resolved: Yes

Http response code: 200

Response time: 1.01 sec.

Last Checked: 08/23/2025

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21mm.ru traffic estimate is about 1,869 unique visitors and 3,738 pageviews per day. The approximated value of 21mm.ru is 2,880 USD. Every unique visitor makes about 2 pageviews on average.

21mm.ru is hosted by Miran Ltd. See the list of other websites hosted by Miran Ltd.

21mm.ru is registered under .RU top-level domain. Check other websites in .RU zone.

During the last check (October 09, 2024) 21mm.ru has an expired SSL certificate issued by Let's Encrypt (expired on November 07, 2024), please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by Let's Encrypt.

In accordance with our information 21mm.ru is a suspicious domain.

Relying on Google Mobile-Friendly test 21mm.ru is well optimized for mobile and tablet devices, however website page loading time may be improved.

21mm.ru General Information

Information not available

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21mm.ru Safety Information

Rankchart Summary

Not Safe

Updated: 08/23/2025

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

Safe

Updated: 04/15/2025

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Norton ConnectSafe evaluates websites for any unsafe and inapropriate content. The results are important for families with young children.

Google Safe Search

Not Checked

Updated: 08/23/2025

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SafeSearch works as a parental control tool to filter out any content that might be inappropriate for your children.

Google Safe Browsing

Safe

Malware not found

Phishing not detected

Unwanted software not found

Harmfull applications not found

Updated: 01/11/2019

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

McAfee® WebAdvisor

Not Safe

Updated: 04/27/2021

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McAfee assesses 21mm.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 21mm.ru for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Child safety is very good

Updated: 02/15/2019

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The WOT calculates reputation of the 21mm.ru. This reputation system receives ratings from users and information from third-party sources, assesses the 21mm.ru for safety features and confirms, whether 21mm.ru is suitable for children.

21mm.ru SSL Information

Information about SSL/TLS certificates

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Domain	21mm.ru
Issuer Organization	Let's Encrypt
Issuer	R10
Algorithm	RSA-SHA256
Valid form	08/09/2024
Expiration	11/07/2024
Signed	Certificate is not self signed
Additional Domains	21mm.ru www.21mm.ru

SSL Checker

21mm.ru Server Information

21mm.ru Server Location

Where website hosting server is located?

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21mm.ru ASN Information

Information about IP address owner

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ASN ID: 41722

ASN Title: Miran Ltd.

Updated: 04/14/2025

Raw ASN data:

% 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 'AS41722'

% Abuse contact for 'AS41722' is 'abuse@miran.ru'

aut-num: AS41722
as-name: MIRAN-AS
org: ORG-ML60-RIPE
remarks: miran.ru
remarks:
remarks:
descr: *********** UPLINK IPv4 ***********
remarks:
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remarks:
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descr: *********** DownLinks IPv4 ***********
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import: from AS205864 accept AS205864
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import: from AS47746 accept AS47746
export: to AS47746 announce ANY
remarks:
remarks:
descr: *********** DownLinks IPv6 ***********
remarks:
remarks:
mp-import: afi ipv6.unicast from AS62251 accept AS-DREAMLESS
mp-export: afi ipv6.unicast to AS62251 announce ANY
mp-import: afi ipv6.unicast from AS198610 accept AS-BEGET
mp-export: afi ipv6.unicast to AS198610 announce ANY
mp-import: afi ipv6.unicast from AS206812 accept AS206812
mp-export: afi ipv6.unicast to AS206812 announce ANY
remarks:
remarks:
descr: *********** IX ***********
remarks:
remarks:
import: from AS60373 accept AS-CODIX
export: to AS60373 announce AS-MIRAN
import: from AS50952 accept AS-DATAIX
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import: from AS48625 accept AS-PIRIX
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import: from AS8631 accept AS-MSKROUTESERVER
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import: from AS43690 accept AS-SPBROUTESERVER
export: to AS43690 announce AS-MIRAN
remarks:
remarks:
descr: *********** IXv6 ***********
mp-import: afi ipv6.unicast from AS48625 accept AS-PIRIX
mp-export: afi ipv6.unicast to AS48625 announce AS-MIRAN
mp-import: afi ipv6.unicast from AS50952 accept AS-DATAIX
mp-export: afi ipv6.unicast to AS50952 announce AS-MIRAN
mp-import: afi ipv6.unicast from AS8631 accept AS-MSKROUTESERVER
mp-export: afi ipv6.unicast to AS8631 announce AS-MIRAN
mp-import: afi ipv6.unicast from AS43690 accept AS-SPBROUTESERVER
mp-export: afi ipv6.unicast to AS43690 announce AS-MIRAN
remarks:
remarks:
descr: *********** PEERING ***********
remarks:
remarks:
import: from AS12695 accept AS-DINET
export: to AS12695 announce AS-MIRAN
import: from AS6939 accept AS-HURRICANE
export: to AS6939 announce AS-MIRAN
import: from AS3216 accept AS-SOVAM
export: to AS3216 announce AS-MIRAN
remarks:
remarks:
descr: ********** RIPE-NCC-RIS **********
remarks:
remarks:
import: from AS12654 accept AS12654
export: to AS12654 announce ANY
mp-import: afi ipv6.unicast from AS12654 accept AS12654
mp-export: afi ipv6.unicast to AS12654 announce ANY
remarks:
remarks:
remarks: *********** PEERING IPv6 ***********
mp-import: afi ipv6.unicast from AS6939 accept AS-HURRICANE
mp-export: afi ipv6.unicast to AS6939 announce AS-MIRAN
remarks:
remarks:
remarks: ********* DDOS-PROTECTION *********
remarks:
import: from AS201706 accept NOT ANY
export: to AS201706 announce AS-MIRAN
remarks:
remarks:
descr: ******* BGP communities accepted from downstream/peering*******
remarks:
remarks:
remarks: Only /32 accepted
remarks: Blackhole:
remarks: 41722:666
remarks:
remarks:
admin-c: MC24698-RIPE
tech-c: MC24698-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: MNT-MIRAN
mnt-routes: MNT-MIRAN
created: 2006-10-13T14:21:32Z
last-modified: 2018-07-25T12:18:28Z
source: RIPE

organisation: ORG-ML60-RIPE
org-name: Miran Ltd.
org-type: LIR
address: PIROGOVSKAYA EMB 17 OF 205
address: 194044
address: ST PETERSBURG
address: RUSSIAN FEDERATION
phone: +7 812 4907090
fax-no: +7 812 4907090
admin-c: MC24698-RIPE
tech-c: MC24698-RIPE
abuse-c: MA14752-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: MNT-MIRAN
mnt-by: RIPE-NCC-HM-MNT
mnt-by: MNT-MIRAN
created: 2006-10-04T08:44:16Z
last-modified: 2017-01-09T10:47:15Z
source: RIPE # Filtered

role: Miran Contacts
address: PIROGOVSKAYA EMB 17 OF 205
address: St.Peterburg,Russia,194044
abuse-mailbox: abuse@miran.ru
admin-c: MS33038-RIPE
admin-c: RGON-RIPE
tech-c: MS33038-RIPE
tech-c: RGON-RIPE
nic-hdl: MC24698-RIPE
mnt-by: MNT-MIRAN
created: 2012-10-26T09:28:17Z
last-modified: 2016-01-28T13:20:01Z
source: RIPE # Filtered

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

Geolocation

ASN Lookup

21mm.ru Domain Name Information

21mm.ru DNS Information

Domain name service records

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A

Host	A Record	TTL

21mm.ru Whois Information

Information about registered users or assignees of an Internet resource

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Raw WHOIS data:

Whois

DNS Lookup

21mm.ru HTML Validation

21mm.ru W3C HTML Markup Validation

HTML markup errors and warnings

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Errors:

A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.

Bad start tag in “img” in “head”.

Stray end tag “noscript”.

Stray end tag “head”.

Start tag “body” seen but an element of the same type was already open.

Cannot recover after last error. Any further errors will be ignored.

Warnings:

The “type” attribute for the “style” element is not needed and should be omitted.

The “type” attribute is unnecessary for JavaScript resources.

HTML Validator

21mm.ru Desktop Performance

How Well 21mm.ru Performs On Desktops?

Website desktop performance and usability tips

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Speed

70%

Optimize images

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

Minify JavaScript

Leverage browser caching

Minify CSS

Enable compression

Minify HTML

Updated: 04/21/2018

21mm.ru Mobile Performance

How Optimized Is 21mm.ru for Mobile Devices?

Tips on speeding up mobile site performance

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Usability

62%

Use legible font sizes

Size tap targets appropriately

Configure the viewport

Updated: 04/21/2018

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21mm.ru URL Typos

Most common user URL mistypes for 21mm.ru

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Total Resources	207
Number of Hosts	17
Static Resources	180
JavaScript Resources	52
CSS Resources	21

CSS	1.5 MBytes
Images	1.7 MBytes
HTML	246.4 KBytes
JavaScript	3.7 MBytes
Other	155.0 KBytes

Total Resources	206
Number of Hosts	18
Static Resources	180
JavaScript Resources	50
CSS Resources	21

CSS	1.5 MBytes
Images	1.7 MBytes
HTML	236.5 KBytes
JavaScript	3.7 MBytes
Other	108.8 KBytes