210.125.240.0/21

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kren.kr
ASN	AS4766
Parent Range	210.125.128.0/17
Registry	APNIC
ID	KREN

WHOIS Details

inetnum:        210.125.128.0 - 210.125.255.255
netname:        KREN
descr:          Korean Education Network
admin-c:        IM70-AP
tech-c:         IM70-AP
country:        KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2017-02-02T04:55:44Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        Jeollanam-do Naju-si Jinheung-gil
e-mail:         irt@nic.or.kr
abuse-mailbox:  irt@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        irt@nic.or.kr was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2021-06-15T06:21:49Z
source:         APNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM70-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-07-09T23:56:03Z
source:         APNIC

inetnum:        210.125.128.0 - 210.125.255.255
netname:        KREN-KR
descr:          Korean Education Network
country:        KR
admin-c:        IA142-KR
tech-c:         IM142-KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IA142-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM142-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

Overlapping Ranges

BGP prefixes that contain 210.125.240.0/21

Range	ASN	Company	Num of IPs
210.125.128.0/17	AS10190	Korean Education Network	32,768
210.125.128.0/17	AS18029	Korean Education Network	32,768
210.125.128.0/17	AS18158	Korean Education Network	32,768
210.125.128.0/17	AS3786	Korean Education Network	32,768
210.125.128.0/17	AS9978	Korean Education Network	32,768
210.125.128.0/17	AS4766	Korean Education Network	32,768
210.125.128.0/17	AS9867	Korean Education Network	32,768

Nearby Ranges

BGP prefixes that overlap with 210.125.0.0/16

Range	ASN	Company	Num of IPs
210.125.128.0/17	AS9978	Korean Education Network	32,768
210.125.128.0/17	AS18029	Korean Education Network	32,768
210.125.128.0/17	AS18158	Korean Education Network	32,768
210.125.128.0/17	AS10190	Korean Education Network	32,768
210.125.128.0/17	AS3786	Korean Education Network	32,768
210.125.128.0/17	AS4766	Korean Education Network	32,768
210.125.128.0/17	AS9867	Korean Education Network	32,768
210.125.16.0/20	AS23714	Korean Education Network	4,096

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

33 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
210.125.240.90	AS4766 Korea Telecom	`1.74ms` from Seoul, KR
210.125.247.1	AS4766 Korea Telecom	`1.78ms` from Seoul, KR
210.125.243.1	AS4766 Korea Telecom	`1.77ms` from Seoul, KR
210.125.242.109	AS4766 Korea Telecom	`1.78ms` from Seoul, KR
210.125.246.1	AS4766 Korea Telecom	`2.00ms` from Seoul, KR
210.125.245.1	AS4766 Korea Telecom	`1.94ms` from Seoul, KR
210.125.244.1	AS4766 Korea Telecom	`1.87ms` from Seoul, KR
210.125.241.1	AS4766 Korea Telecom	`1.93ms` from Seoul, KR

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
86.93.247.165	AS1136 KPN B.V.	`2.69ms` from Amsterdam, NL
184.80.188.69	AS7029 Windstream Communications LLC	`6.61ms` from Atlanta, US
38.154.125.69	AS55286 B2 Net Solutions Inc.	`0.13ms` from Buffalo, US
24.211.185.181	AS11426 Charter Communications Inc	`10.56ms` from Charlotte, US
207.225.193.101	AS209 CenturyLink Communications, LLC	`9.95ms` from Denver, US
143.93.242.133	AS2857 Johannes Gutenberg-Universitaet Mainz	`2.15ms` from Frankfurt am Main, DE
124.225.111.21	AS4134 CHINANET-BACKBONE	`0.52ms` from Haikou, CN
14.166.34.117	AS45899 VNPT Corp	`1.99ms` from Hanoi, VN
150.230.246.165	AS31898 Oracle Corporation	`0.15ms` from Jeddah, SA
77.54.211.229	AS12353 Vodafone Portugal	`2.56ms` from Lisbon, PT
80.47.161.133	AS13285 TalkTalk Communications Limited	`5.76ms` from London, GB
208.107.60.181	AS11232 Midcontinent Communications	`8.51ms` from Minneapolis, US
34.155.99.53	AS396982 Google LLC	`0.09ms` from Paris, FR
95.252.188.101	AS3269 Telecom Italia S.p.A.	`10.31ms` from Rome, IT
79.136.101.5	AS8473 Bahnhof AB	`0.71ms` from Stockholm, SE
220.133.175.213	AS3462 Data Communication Business Group	`2.55ms` from Taichung, TW
94.244.77.21	AS25190 UAB "Kauno interneto sistemos"	`1.66ms` from Vilnius, LT
69.251.44.117	AS7922 Comcast Cable Communications, LLC	`7.27ms` from Ashburn, US
113.44.155.149	AS55990 Huawei Cloud Service data center	`3.38ms` from Beijing, CN
41.238.60.37	AS8452 TE-AS	`4.45ms` from Cairo, EG
86.58.145.37	AS47292 Sentia Denmark A/S	`0.88ms` from Copenhagen, DK
149.81.176.165	AS36351 IBM Cloud	`0.47ms` from Frankfurt am Main, DE
113.106.64.213	AS4134 CHINANET-BACKBONE	`7.62ms` from Guangzhou, CN
77.1.147.21	AS6805 Telefonica Germany GmbH & Co.OHG	`8.06ms` from Hamburg, DE
84.239.154.149	AS29422 Telia Cygate Oy	`0.78ms` from Helsinki, FI

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f7 210.125.242.109

traceroute to 210.125.242.109 (210.125.242.109): 64 hops max, 52 byte packets

7 [AS4766] 112.174.99.242 1.345 ms

8 *

9 *

10 [AS4766] 121.170.96.134 1.866 ms

11 [AS4766] 210.125.240.102 2.219 ms

12 [AS4766] 220.149.212.190 2.296 ms

13 [AS4766] 210.125.242.109 1.935 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On October 30th 2025

What are IP address ranges?

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