1. All IP Ranges
  2. 121.0.0.0/8
  3. 121.139.0.0/16
  4. AS23591  | 121.139.137.0/24

121.139.137.0/24

AS23591  ·  LS ITC

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Summary

Country South Korea
Domain kt.com
ASN AS23591
Parent Range 121.128.0.0/11
Registry APNIC
ID KORNET

WHOIS Details

inetnum:        121.128.0.0 - 121.159.255.255
netname:        KORNET
descr:          Korea Telecom
admin-c:        IM667-AP
tech-c:         IM667-AP
country:        KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
changed:        hostmaster@nic.or.kr 20170203
source:         APNIC

irt:            IRT-KRNIC-KR
address:        Seoul Songpa-gu Jungdae-ro 135
e-mail:         hostmaster@nic.or.kr
abuse-mailbox:  hostmaster@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20150513
source:         APNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IM667-AP
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20170328
source:         APNIC

inetnum:        121.128.0.0 - 121.159.255.255
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
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.krnic.net.
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        
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
source:         KRNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        
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
source:         KRNIC

Overlapping Ranges

BGP prefixes that contain 121.139.137.0/24

Range ASN Company Num of IPs
121.128.0.0/11 AS10040 Korea Telecom 2,097,152
121.128.0.0/11 AS131792 Korea Telecom 2,097,152
121.128.0.0/11 AS152214 Korea Telecom 2,097,152
121.128.0.0/11 AS17588 Korea Telecom 2,097,152
121.128.0.0/11 AS17834 Korea Telecom 2,097,152
121.128.0.0/11 AS18023 Korea Telecom 2,097,152
121.128.0.0/11 AS18333 Korea Telecom 2,097,152
121.128.0.0/11 AS23591 Korea Telecom 2,097,152
121.128.0.0/11 AS3786 Korea Telecom 2,097,152
121.128.0.0/11 AS38122 Korea Telecom 2,097,152
121.128.0.0/11 AS38126 Korea Telecom 2,097,152
121.128.0.0/11 AS38394 Korea Telecom 2,097,152
121.128.0.0/11 AS38395 Korea Telecom 2,097,152
121.128.0.0/11 AS38399 Korea Telecom 2,097,152
121.128.0.0/11 AS38412 Korea Telecom 2,097,152
121.128.0.0/11 AS38697 Korea Telecom 2,097,152
121.128.0.0/11 AS45401 Korea Telecom 2,097,152
121.128.0.0/11 AS45404 Korea Telecom 2,097,152
121.128.0.0/11 AS46002 Korea Telecom 2,097,152
121.128.0.0/11 AS46009 Korea Telecom 2,097,152
121.128.0.0/11 AS4766 Korea Telecom 2,097,152
121.128.0.0/11 AS4790 Korea Telecom 2,097,152
121.128.0.0/11 AS55592 Korea Telecom 2,097,152
121.128.0.0/11 AS55593 Korea Telecom 2,097,152
121.128.0.0/11 AS55630 Korea Telecom 2,097,152
121.128.0.0/11 AS9273 Korea Telecom 2,097,152
121.128.0.0/11 AS9526 Korea Telecom 2,097,152
121.128.0.0/11 AS9530 Korea Telecom 2,097,152
121.128.0.0/11 AS9638 Korea Telecom 2,097,152
121.128.0.0/11 AS9647 Korea Telecom 2,097,152
121.128.0.0/11 AS9684 Korea Telecom 2,097,152
121.128.0.0/11 AS9696 Korea Telecom 2,097,152
121.128.0.0/11 AS9776 Korea Telecom 2,097,152
121.128.0.0/11 AS9856 Korea Telecom 2,097,152
121.128.0.0/11 AS9862 Korea Telecom 2,097,152
121.128.0.0/11 AS9870 Korea Telecom 2,097,152
121.128.0.0/11 AS9968 Korea Telecom 2,097,152

Nearby Ranges

BGP prefixes that overlap with 121.139.0.0/16

Range ASN Company Num of IPs
121.128.0.0/11 AS10040 Korea Telecom 2,097,152
121.128.0.0/11 AS131792 Korea Telecom 2,097,152
121.128.0.0/11 AS152214 Korea Telecom 2,097,152
121.128.0.0/11 AS17588 Korea Telecom 2,097,152
121.128.0.0/11 AS17834 Korea Telecom 2,097,152
121.128.0.0/11 AS18023 Korea Telecom 2,097,152
121.128.0.0/11 AS18333 Korea Telecom 2,097,152
121.128.0.0/11 AS23591 Korea Telecom 2,097,152
121.128.0.0/11 AS3786 Korea Telecom 2,097,152
121.128.0.0/11 AS38122 Korea Telecom 2,097,152
121.128.0.0/11 AS38126 Korea Telecom 2,097,152
121.128.0.0/11 AS38394 Korea Telecom 2,097,152
121.128.0.0/11 AS38395 Korea Telecom 2,097,152
121.128.0.0/11 AS38399 Korea Telecom 2,097,152
121.128.0.0/11 AS38412 Korea Telecom 2,097,152
121.128.0.0/11 AS38697 Korea Telecom 2,097,152
121.128.0.0/11 AS45401 Korea Telecom 2,097,152
121.128.0.0/11 AS45404 Korea Telecom 2,097,152
121.128.0.0/11 AS46002 Korea Telecom 2,097,152
121.128.0.0/11 AS46009 Korea Telecom 2,097,152
121.128.0.0/11 AS4766 Korea Telecom 2,097,152
121.128.0.0/11 AS4790 Korea Telecom 2,097,152
121.128.0.0/11 AS55592 Korea Telecom 2,097,152
121.128.0.0/11 AS55593 Korea Telecom 2,097,152
121.128.0.0/11 AS55630 Korea Telecom 2,097,152
121.128.0.0/11 AS9273 Korea Telecom 2,097,152
121.128.0.0/11 AS9526 Korea Telecom 2,097,152
121.128.0.0/11 AS9530 Korea Telecom 2,097,152
121.128.0.0/11 AS9638 Korea Telecom 2,097,152
121.128.0.0/11 AS9647 Korea Telecom 2,097,152
121.128.0.0/11 AS9684 Korea Telecom 2,097,152
121.128.0.0/11 AS9696 Korea Telecom 2,097,152
121.128.0.0/11 AS9776 Korea Telecom 2,097,152
121.128.0.0/11 AS9856 Korea Telecom 2,097,152
121.128.0.0/11 AS9862 Korea Telecom 2,097,152
121.128.0.0/11 AS9870 Korea Telecom 2,097,152
121.128.0.0/11 AS9968 Korea Telecom 2,097,152

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

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

IP Address ASN Details
121.139.137.149 AS23591 LS ITC 5.83ms 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
87.89.223.152 AS5410 Bouygues Telecom SA 10.53ms from Aubervilliers, FR
147.161.100.88 AS35699 Adamo Telecom Iberia S.A. 1.49ms from Barcelona, ES
24.62.83.72 AS7922 Comcast Cable Communications, LLC 7.01ms from Boston, US
63.34.97.72 AS16509 Amazon.com, Inc. 0.15ms from Dublin, IE
187.144.43.152 AS8151 UNINET 6.38ms from Guadalajara, MX
176.217.181.72 AS8386 Vodafone Net Iletisim Hizmetler AS 4.99ms from Istanbul, TR
51.24.26.200 AS16509 Amazon.com, Inc. 0.20ms from London, GB
109.180.213.184 AS2856 British Telecommunications PLC 4.62ms from London, GB
60.130.58.248 AS17676 SoftBank Corp. 3.79ms from Osaka, JP
85.131.113.232 AS16086 DNA Oyj 9.44ms from Oulu, FI
86.204.69.152 AS3215 Orange S.A. 11.11ms from Paris, FR
89.95.115.152 AS5410 Bouygues Telecom SA 10.73ms from Paris, FR
182.225.151.168 AS17858 LG POWERCOMM 1.92ms from Seoul, KR
210.96.3.152 AS4766 Korea Telecom 1.73ms from Seoul, KR
103.115.108.200 AS152179 GLOBAL COMMUNICATION NETWORK LIMITED 1.01ms from Taipei, TW
193.121.254.168 AS5432 Proximus NV 5.14ms from Amsterdam, NL
108.66.11.216 AS7018 AT&T Enterprises, LLC 9.57ms from Atlanta, US
52.242.89.8 AS8075 Microsoft Corporation 0.19ms from Boydton, US
102.189.99.56 AS24835 Vodafone Data 9.06ms from Cairo, EG
24.74.214.104 AS11426 Charter Communications Inc 7.36ms from Charlotte, US
220.192.67.152 AS4837 CHINA UNICOM China169 Backbone 2.70ms from Chongqing, CN
173.199.186.88 AS32244 Liquid Web, L.L.C 0.20ms from Lansing, US
81.77.27.56 AS5378 Vodafone Limited 6.84ms from Manchester, GB
112.210.222.152 AS9299 Philippine Long Distance Telephone Company 2.57ms from Manila, PH
72.23.159.152 AS27364 Armstrong 3.27ms from Pittsburgh, US

Traceroute

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

$
traceroute -a -n -q1 -f5 -m11 121.139.137.171
traceroute to 121.139.137.171 (121.139.137.171): 11 hops max, 52 byte packets
5 [] 146.70.0.34 5.919 ms
6 [AS9009] 212.103.51.21 5.873 ms
7 [AS3786] 1.213.153.209 255.381 ms
8 [AS3786] 1.208.105.61 294.28 ms
9 *
10 *
11 *
Measurement taken from IPinfo ProbeNet in Brussels, BE
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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