Lektsii.org Лекции.Орг - публикация материала для обучения

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Lektsii.org Overview

Lektsii.org ranking shows that the page is at position 21,143 over the world, while the bulk of its audience is from Russian Federation, where it ranks 1,553.

Lektsii.org hosted on JSC "ISPsystem" servers in United States. To reduce page loading time for the majority of lektsii.org users, we recommend migrating the server to Russian Federation, as it will speed up lektsii.org page load time for the majority of users. See the list of other webpages hosted on JSC "ISPsystem" servers.

In terms of rank-to-traffic ratio, lektsii.org has 23,908 unique users per day, viewing 34,906 pages. The rank based value of lektsii.org is 615,567 USD. Every user makes 1.56 pageviews on average.

Lektsii.org boasts a link base consisting of 374 referring domains and 447 external backlinks, as revealed by the data obtained from web network scanning.

Lektsii.org top-level domain belongs to .ORG domain zone. Check other webpages in .ORG zone.

According the last verification test in October 13, 2024, lektsii.org has an expired SSL certificate issued by Google Trust Services (expired on January 11, 2025). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by Google Trust Services.

Based on data from Google Safe Browsing, Google Safe Search, Symantec and Web of Trust lektsii.org is a fairly safe domain.

According the Mobile-Friendly test by Google lektsii.org is nice optimized for mobile devices and tablets.

Lektsii.org Rank Summary

Global Rank

21,143

Average Load Time

0.58sec

Links In Count

212

Website Value

$569,969

Audience Geography. Where are lektsii.org visitors located?

Country	Visitors
Russian Federation RU	58.4%
Kazakhstan KZ	19.2%
Ukraine UA	4%
Belarus BY	2.4%
Uzbekistan UZ	1.7%
Other	14.2%

Country	Pageviews
Russian Federation RU	56.7%
Kazakhstan KZ	21.7%
Ukraine UA	3.9%
Uzbekistan UZ	3.6%
Belarus BY	2%
Other	12.1%

Country	Rank
Kazakhstan KZ	375
Russian Federation RU	1553
Uzbekistan UZ	1678
Belarus BY	2072
Ukraine UA	3312

Where do visitors go on lektsii.org?

Subdomain	Pageviews
lektsii.org	100%

Subdomain	Pageviews per User
lektsii.org	1.5

Subdomain	Reach
lektsii.org	100%

How popular is lektsii.org?

Period	Global Rank	Global Rank Delta
past 3 months	21143	13679
past month	26796	-27831
past week	18733	660
yesterday	53944	18468

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	38226	24617	169	-67.311%	1.46	4%
30	51512	-31990	13	82%	1.5	-16.57%
7	38036	2245	18	-5.425%	1.4	-2.68%
1	65215	-3932	11	3%	2.6	80%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	17235	11308	43	-68.637%
30	21616	-25119	33	120%
7	15122	419	47	-3.01%
1	63265	34154	16	-41.34%

Lektsii.org Website Safety

Overview

Last Updated: 10/05/2025

Overall result - lektsii.org is safe.

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: 03/25/2025

lektsii.org is safe.

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

Google Safe Search

Last Updated: 09/09/2019

lektsii.org is safe.

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

lektsii.org 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: 02/25/2021

lektsii.org is safe.

McAfee assesses lektsii.org 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 lektsii.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/10/2019

lektsii.org child safety is very good.

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

SSL Information

SSL Checker Tool

Domain	lektsii.org
Issuer Organization	Google Trust Services
Issuer	WE1
Algorithm	ecdsa-with-SHA256
Valid form	10/13/2024
Expiration	01/11/2025
Signed	Certificate is not self signed
Additional Domains	lektsii.org *.lektsii.org

Lektsii.org Rank History

Alexa Rank shows how popular lektsii.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If lektsii.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to lektsii.org and pageviews on lektsii.org over the past 3 months.

Lektsii.org Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 29182

ASN Title: JSC "ISPsystem"

Last Update: 08/30/2025

% 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 'AS29092 - AS29337'

as-block: AS29092 - AS29337
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: 2010-05-11T11:46:28Z
last-modified: 2014-02-24T13:15:17Z
source: RIPE

% Information related to 'AS29182'

% Abuse contact for 'AS29182' is 'abuse@abusehost.ru'

aut-num: AS29182
as-name: ISPSYSTEM-AS
org: ORG-IHs2-RIPE
remarks: *** eXchange Points ***
import: from AS8631 action pref=100; accept AS-MSKROUTESERVER
export: to AS8631 announce AS-ISPSYSTEM
remarks: *** Uplinks ***
import: from AS8345 action pref=100; accept ANY
export: to AS8345 announce AS29182
import: from AS12695 action pref=100; accept ANY
export: to AS12695 announce AS-ISPSYSTEM
import: from AS50673 action pref=100; accept ANY
export: to AS50673 announce AS-ISPSYSTEM
import: from AS20485 action pref=100; accept ANY
export: to AS20485 announce AS-ISPSYSTEM
import: from AS57724 action pref=100; accept ANY
export: to AS57724 announce AS-ISPSYSTEM
import: from AS29226 action pref=100; accept ANY
export: to AS29226 announce AS-ISPSYSTEM
import: from AS48166 action pref=100; accept ANY
export: to AS48166 announce AS-ISPSYSTEM
remarks: *** Clients ***
import: from AS60135 action pref=400; accept AS60135
export: to AS60135 announce ANY
import: from AS49227 action pref=400; accept AS49227
export: to AS49227 announce ANY
import: from AS60890 action pref=400; accept AS-CNIC
export: to AS60890 announce ANY
import: from AS22169 action pref=400; accept AS22169
export: to AS22169 announce ANY
remarks: *** IPv6 neighbors, rpsl migrate ***
mp-import: afi ipv6.unicast,ipv4 from AS8631 accept AS-MSKROUTESERVER
mp-export: afi ipv6.unicast,ipv4 to AS8631 announce AS-ISPSYSTEM
mp-import: afi ipv6.unicast,ipv4 from AS31500 accept ANY
mp-export: afi ipv6.unicast,ipv4 to AS31500 announce AS29182
mp-import: afi ipv6.unicast,ipv4 from AS12695 accept ANY
mp-export: afi ipv6.unicast,ipv4 to AS12695 announce AS-ISPSYSTEM
mp-import: afi ipv6.unicast,ipv4 from AS6679 accept ANY
mp-export: afi ipv6.unicast,ipv4 to AS6679 announce AS-ISPSYSTEM
admin-c: ISP49-RIPE
tech-c: ISP49-RIPE
status: ASSIGNED
mnt-by: ISPSYSTEM-MNT
mnt-by: RIPE-NCC-END-MNT
created: 2003-06-23T14:25:12Z
last-modified: 2018-04-11T09:02:42Z
source: RIPE

organisation: ORG-IHs2-RIPE
org-name: JSC "ISPsystem"
org-type: LIR
address: PoBox 30
address: 664017
address: Irkutsk
address: RUSSIAN FEDERATION
phone: +74956681264
fax-no: +73952525096
admin-c: ST6386-RIPE
mnt-ref: ISPSYSTEM-MNT
mnt-ref: RIPE-NCC-HM-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: ISPSYSTEM-MNT
abuse-c: AD11067-RIPE
created: 2004-04-17T11:37:43Z
last-modified: 2017-10-30T15:27:52Z
source: RIPE # Filtered

role: ISPsystem JSC Network Operations
address: Russian Federation
phone: +7 (495) 668 12 64
fax-no: +7 (3952) 52 57 89
remarks: trouble: ------------------------------------------------------
remarks: trouble: Points of contact for ISPsystem CJSC Network Operations
remarks: trouble: ------------------------------------------------------
remarks: trouble: Routing and peering issues: noc@ispsystem.net
remarks: trouble: SPAM issues: abuse@abusehost.ru
remarks: trouble: Mail issues: abuse@abusehost.ru
remarks: trouble: General information: admin@ispsystem.com
remarks: trouble: ------------------------------------------------------
admin-c: AA26905-RIPE
tech-c: ST6386-RIPE
nic-hdl: ISP49-RIPE
mnt-by: ISPSYSTEM-MNT
created: 2014-09-12T07:12:33Z
last-modified: 2018-02-21T07:42:38Z
source: RIPE # Filtered
abuse-mailbox: abuse@abusehost.ru

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

Lektsii.org Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: lektsii.org
Registry Domain ID: 969f1ff08e994f969b2fb3691f37f045-LROR
Registrar WHOIS Server: http://whois.reg.com
Registrar URL: http://www.reg.com
Updated Date: 2025-01-05T03:43:28Z
Creation Date: 2015-01-24T10:26:20Z
Registry Expiry Date: 2026-01-24T10:26:20Z
Registrar: Registrar of Domain Names REG.RU LLC
Registrar IANA ID: 1606
Registrar Abuse Contact Email: abuse@reg.ru
Registrar Abuse Contact Phone: +7.4955801111
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: ns1.reg.ru
Name Server: ns2.reg.ru
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2025-03-20T03:34:37Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
lektsii.org	172.67.212.134	300
lektsii.org	104.21.91.83	300

Host	MX Record	Priority	TTL

Host	NS Record	TTL
lektsii.org	annalise.ns.cloudflare.com	86400
lektsii.org	arturo.ns.cloudflare.com	86400

Host	TXT Record	TTL

annalise.ns.cloudflare.com
TTL: 1800
Email address: dns.cloudflare.com
Serial: 2360132733
Refresh: 10000
Retry: 2400
Expire: 604800
Minimum: 1800

Lektsii.org HTML Check

HTML Validation Tool

Errors

Malformed byte sequence: “cb”.

Malformed byte sequence: “e5”.

Malformed byte sequence: “ea”.

Malformed byte sequence: “f6”.

Malformed byte sequence: “e8”.

Malformed byte sequence: “ce”.

Malformed byte sequence: “f0”.

Malformed byte sequence: “e3”.

Malformed byte sequence: “ef”.

Malformed byte sequence: “f3”.

Malformed byte sequence: “e1”.

Malformed byte sequence: “eb”.

Malformed byte sequence: “e0”.

Malformed byte sequence: “ff”.

Malformed byte sequence: “ec”.

Malformed byte sequence: “f2”.

Malformed byte sequence: “e4”.

Malformed byte sequence: “ee”.

Malformed byte sequence: “f7”.

Malformed byte sequence: “ed”.

Malformed byte sequence: “f1”.

Malformed byte sequence: “e2”.

Malformed byte sequence: “e9”.

Malformed byte sequence: “f4”.

Malformed byte sequence: “d7”.

Malformed byte sequence: “fc”.

Malformed byte sequence: “fb”.

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Internal encoding declaration “windows-1251” disagrees with the actual encoding of the document (“utf-8”).

Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.

Bad value “PRAGMA” for attribute “http-equiv” on element “meta”.

Malformed byte sequence: “e7”.

Bad value “x” for attribute “hreflang” on element “link”: No subtags in private use sequence.

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

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

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

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

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

The “center” element is obsolete. Use CSS instead.

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

The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.

The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.

Malformed byte sequence: “cf”.

Malformed byte sequence: “cd”.

Malformed byte sequence: “ca”.

Malformed byte sequence: “c0”.

Malformed byte sequence: “c1”.

Malformed byte sequence: “c3”.

Malformed byte sequence: “c4”.

Malformed byte sequence: “c8”.

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

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

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

Malformed byte sequence: “cc”.

Malformed byte sequence: “f5”.

Malformed byte sequence: “d0”.

Malformed byte sequence: “d1”.

Malformed byte sequence: “d2”.

Malformed byte sequence: “d4”.

Malformed byte sequence: “d5”.

Malformed byte sequence: “dd”.

Malformed byte sequence: “fd”.

Malformed byte sequence: “e6”.

Malformed byte sequence: “f9”.

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

NON-DOCUMENT-ERROR

Too many messages.

Lektsii.org Desktop Performance

Last tested: 07/03/2018

Desktop Speed

78%

Optimize images

Enable compression

Leverage browser caching

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

Desktop Resource Breakdown

Total Resources	20
Number of Hosts	7
Static Resources	14
JavaScript Resources	6
CSS Resources	1

Lektsii.org Mobile Insights

Last tested: 07/03/2018

Mobile Usability

83%

Size tap targets appropriately

Mobile Speed

77%

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

Prioritize visible content

Enable compression

Optimize images

Leverage browser caching

Mobile Resource Breakdown

Total Resources	77
Number of Hosts	26
Static Resources	16
JavaScript Resources	15
CSS Resources	1

Lektsii.org Common Typos

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Lektsii.org Лекции.Орг - публикация материала для обучения

Читать лекции, лебораторные, курсовые, дипломы по разным дисциплинам на одном сайте.

Lektsii.org Overview

Lektsii.org Rank Summary

Lektsii.org Website Safety

Lektsii.org Rank History

Lektsii.org Hosting Information

Lektsii.org Domain Registration and Settings

Lektsii.org HTML Check

Lektsii.org Desktop Performance

Lektsii.org Mobile Insights

Lektsii.org Similar Audits

Lektsii.org Common Typos