Ef.co.kr EF Education First | 코리아

50년 역사의 세계 최대 교육 기업 EF는 여러분이 세계 무대에서 꿈을 펼칠 수 있도록 문화 교류와 학업적 성취, 여행 등을 결합한 어학연수와 유학 프로그램을 제공합니다.

Ef.co.kr Quick Summary

Status

Offline

Server IP address resolved: No

Http response code: None

Last Checked: 06/07/2025

Ef.co.kr traffic estimate is about 1,619 unique visitors and 1,619 pageviews per day. The approximated value of ef.co.kr is 21,900 USD. Every unique visitor makes about 1 pageviews on average.

Alexa Traffic Rank estimates that ef.co.kr is ranked number 30,866 in the world.

Ef.co.kr is registered under .KR top-level domain. Check other websites in .KR zone.

During the last check (August 08, 2024) ef.co.kr has an expired SSL certificate issued by Google Trust Services (expired on October 13, 2024), please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by Google Trust Services.

In accordance with Google Safe Browsing, Google Safe Search and Symantec ef.co.kr is pretty a safe domain.

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

Ef.co.kr General Information

Ef.co.kr Audience Geography

Where are website visitors coming from?

Visitors
Pageviews
Ranks

Country	Visitors

Ef.co.kr Traffic Distribution

Where do visitors go on ef.co.kr?

Subdomain Traffic
Views per User
Subdomain Reach

Subdomain	Pageviews

Ef.co.kr Popularity

How popular is ef.co.kr?

Global Rank
Pageviews
Reach

Period	Global Rank	Global Rank Delta
past 3 months	427079	107618
past month	552639	36371
past week	299991	0

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	629488	203269	5	-36.14%	1	-19.65%
30	801981	35276	4	-6.161%	1	0.8%
7	482353	0	8	0%	1	0%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	370207	73029	14	-21%
30	478929	39170	1	-6.917%
7	226555	0	3	0%

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Ef.co.kr Safety Information

Rankchart Summary

Safe

Updated: 06/07/2025

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: 04/02/2025

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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

Safe

Updated: 09/14/2019

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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: 01/09/2019

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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

Safe

Updated: 03/02/2021

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McAfee assesses ef.co.kr 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 ef.co.kr for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Not Checked

Updated: 06/07/2025

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

Ef.co.kr SSL Information

Information about SSL/TLS certificates

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Domain	ef.co.kr
Issuer Organization	Google Trust Services
Issuer	WE1
Algorithm	ecdsa-with-SHA256
Valid form	07/15/2024
Expiration	10/13/2024
Signed	Certificate is not self signed
Additional Domains	ef.co.kr *.ef.co.kr

SSL Checker

Ef.co.kr Server Information

Ef.co.kr Server Location

Where website hosting server is located?

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Ef.co.kr ASN Information

Information about IP address owner

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ASN ID: 13335

ASN Title: CLOUDFLARENET - Cloudflare, Inc., US

Updated: 12/23/2024

Raw ASN data:

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

ASNumber: 13335
ASName: CLOUDFLARENET
ASHandle: AS13335
RegDate: 2010-07-14
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/autnum/13335

OrgName: Cloudflare, Inc.
OrgId: CLOUD14
Address: 101 Townsend Street
City: San Francisco
StateProv: CA
PostalCode: 94107
Country: US
RegDate: 2010-07-09
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/entity/CLOUD14

OrgTechHandle: ADMIN2521-ARIN
OrgTechName: Admin
OrgTechPhone: +1-650-319-8930
OrgTechEmail: rir@cloudflare.com
OrgTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

OrgAbuseHandle: ABUSE2916-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-650-319-8930
OrgAbuseEmail: abuse@cloudflare.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

OrgNOCHandle: NOC11962-ARIN
OrgNOCName: NOC
OrgNOCPhone: +1-650-319-8930
OrgNOCEmail: noc@cloudflare.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RNOCHandle: NOC11962-ARIN
RNOCName: NOC
RNOCPhone: +1-650-319-8930
RNOCEmail: noc@cloudflare.com
RNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RTechHandle: ADMIN2521-ARIN
RTechName: Admin
RTechPhone: +1-650-319-8930
RTechEmail: rir@cloudflare.com
RTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

RAbuseHandle: ABUSE2916-ARIN
RAbuseName: Abuse
RAbusePhone: +1-650-319-8930
RAbuseEmail: abuse@cloudflare.com
RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

Geolocation

ASN Lookup

Ef.co.kr Domain Name Information

Ef.co.kr DNS Information

Domain name service records

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A

Host	A Record	TTL

Ef.co.kr Whois Information

Information about registered users or assignees of an Internet resource

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Raw WHOIS data:

Whois

DNS Lookup

Ef.co.kr HTML Validation

Ef.co.kr W3C HTML Markup Validation

HTML markup errors and warnings

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Errors:

Stray doctype.

Bad value “og:http://ogp.me/ns#” for attribute “prefix” on element “html”.

A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.

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

Attribute “arial-label” not allowed on element “a” at this point.

Attribute “aria-role” not allowed on element “a” at this point.

Bad value “tel:1644-9644, 02-6979-9600” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.

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

Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.

No space between attributes.

Bad value “//schema.org/” for attribute “vocab” on element “div”: The string “//schema.org/” is not an absolute URL.

Element “h2” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Warnings:

Consider avoiding viewport values that prevent users from resizing documents.

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

HTML Validator

Ef.co.kr Desktop Performance

How Well Ef.co.kr Performs On Desktops?

Website desktop performance and usability tips

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Speed
Resource Breakdown

Speed

69%

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

Avoid landing page redirects

Leverage browser caching

Reduce server response time

Optimize images

Minify JavaScript

Minify HTML

Updated: 12/04/2017

Ef.co.kr Mobile Performance

How Optimized Is Ef.co.kr for Mobile Devices?

Tips on speeding up mobile site performance

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Usability
Speed
Resource Breakdown

Usability

99%

Size tap targets appropriately

Updated: 12/04/2017

Ef.co.kr Nearest Competitors

Estimated Nearest Competitors Of Ef.co.kr

zaazu.com
cestananovyzeland.cz
i*************g.de
h*******c.edu
a**h.es
bluehealth2020.eu
arthaproperty.id
danatunai.id
msig.info
centropuccini.it
ef.co.kr
discinstinct.net
glump.net
scalventurepartners.net
telesup.net
inscience.news
circulus-berkel.nl
mechatronicseducation.org
portonvictor.org
riot.org
studentexperiencenetwork.org
muzeumpolskiejwodki.pl

Ef.co.kr URL Typos

Most common user URL mistypes for ef.co.kr

www.ef.com
www.ef.net
www.ef.org
www.ef.info
www.ef.biz
www.ef.us
www.ef.mobi
www.f.co.kr
www.ef.co.kr
www.wf.co.kr
www.ewf.co.kr
www.wef.co.kr
www.sf.co.kr
www.esf.co.kr
www.sef.co.kr
www.df.co.kr
www.edf.co.kr
www.def.co.kr
www.rf.co.kr
www.erf.co.kr
www.ref.co.kr
www.e.co.kr
www.ec.co.kr
www.efc.co.kr
www.ecf.co.kr
www.ed.co.kr
www.efd.co.kr
www.er.co.kr
www.efr.co.kr
www.et.co.kr
www.eft.co.kr
www.etf.co.kr
www.eg.co.kr
www.efg.co.kr
www.egf.co.kr
www.ev.co.kr
www.efv.co.kr
www.evf.co.kr

Total Resources	68
Number of Hosts	25
Static Resources	31
JavaScript Resources	26
CSS Resources	5

Text	3.3 KBytes
CSS	362.1 KBytes
Images	434.2 KBytes
HTML	99.9 KBytes
JavaScript	1011.2 KBytes
Other	249.0 KBytes

Total Resources	71
Number of Hosts	26
Static Resources	33
JavaScript Resources	26
CSS Resources	5

Text	3.3 KBytes
CSS	362.1 KBytes
Images	478.7 KBytes
HTML	101.0 KBytes
JavaScript	1010.4 KBytes
Other	248.1 KBytes