211.255.123.0/24

AS45400 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS45400
Registry	KRNIC
ID	KORNET-KR

WHOIS Details

inetnum:        211.255.64.0 - 211.255.127.255
netname:        KORNET-KR
descr:          Korea Telecom
country:        KR
admin-c:        IA9-KR
tech-c:         IM9-KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
changed:        hostmaster@nic.or.kr 20240912
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.
source:         KRNIC


person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        KT Head Office
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IM9-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20240912
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.
source:         KRNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        KT Head Office
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IA9-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20240912
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.
source:         KRNIC

Nearby Ranges

BGP prefixes that overlap with 211.255.0.0/16

Range	ASN	Company	Num of IPs
211.255.32.0/19	AS38661	trizn inc.	8,192
211.255.0.0/19	AS38661	trizn inc.	8,192
211.255.160.0/19	AS10036	DLIVE	8,192
211.255.208.0/20	AS17854	SK Broadband Co Ltd	4,096
211.255.144.0/20	AS4766	BITNET	4,096
211.255.128.0/21	AS4766	BITNET	2,048
211.255.240.0/24	AS9848	CJcablenet	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
211.255.123.117	AS45400 Korea Telecom	`2.06ms` from Incheon, 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
108.254.118.88	AS7018 AT&T Enterprises, LLC	`6.64ms` from Atlanta, US
189.174.112.8	AS8151 UNINET	`0.71ms` from Cancún, MX
23.209.167.24	AS20940 Akamai International B.V.	`0.45ms` from Chicago, US
24.142.181.136	AS10796 Charter Communications Inc	`2.65ms` from Columbus, US
98.58.68.104	AS7922 Comcast Cable Communications, LLC	`6.94ms` from Miami, US
80.16.194.248	AS3269 Telecom Italia S.p.A.	`7.71ms` from Milan, IT
13.36.49.120	AS16509 Amazon.com, Inc.	`0.14ms` from Paris, FR
76.22.99.216	AS7922 Comcast Cable Communications, LLC	`6.51ms` from Seattle, US
112.151.6.104	AS17858 LG POWERCOMM	`1.82ms` from Seoul, KR
45.76.40.72	AS20473 The Constant Company, LLC	`0.13ms` from Amsterdam, NL
219.236.35.8	AS17429 BEIJING GEHUA CATV NETWORK CO.LTD	`7.94ms` from Beijing, CN
181.50.245.152	AS10620 Telmex Colombia S.A.	`17.34ms` from Bogota, CO
217.73.22.136	AS29405 VNET a.s.	`12.58ms` from Bratislava, SK
143.239.81.40	AS1213 ASIERA TECHNOLOGY SERVICES CLG	`5.50ms` from Dublin, IE
73.161.147.72	AS7922 Comcast Cable Communications, LLC	`10.69ms` from Flint, US
147.94.252.120	AS2457 Renater	`1.67ms` from Marseille, FR
112.235.221.40	AS4837 CHINA UNICOM China169 Backbone	`6.95ms` from Qingdao, CN
108.194.165.216	AS7018 AT&T Enterprises, LLC	`7.01ms` from Redding, US
52.207.17.232	AS14618 Amazon.com, Inc.	`0.18ms` from Reston, US
69.105.181.248	AS7018 AT&T Enterprises, LLC	`3.15ms` from San Jose, US
67.171.61.24	AS7922 Comcast Cable Communications, LLC	`5.48ms` from Seattle, US
119.241.128.120	AS2518 BIGLOBE Inc.	`10.13ms` from Tokyo, JP
35.226.8.24	AS396982 Google LLC	`0.10ms` from Council Bluffs, US
81.146.11.200	AS2856 British Telecommunications PLC	`5.11ms` from Erith, GB
109.115.205.104	AS30722 Vodafone Italia S.p.A.	`14.27ms` from Frosinone, IT

Traceroute

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

traceroute -a -n -q1 -f5 211.255.123.78

traceroute to 211.255.123.78 (211.255.123.78): 64 hops max, 52 byte packets

5 [] 193.239.117.168 46.942 ms

6 *

7 *

8 [AS3786] 61.42.201.138 224.138 ms

9 [AS3786] 211.40.2.250 225.492 ms

10 *

11 *

12 *

13 [] 211.255.110.6 236.962 ms

14 [] 211.255.110.18 225.636 ms

15 [] 211.255.111.130 225.711 ms

16 [AS45400] 211.255.123.78 225.989 ms

Measurement taken from

IPinfo ProbeNet in Jeddah, SA

On January 18th 2026

What are IP address ranges?

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