103.157.158.0/24

AS23579 · Seoul Metropolitan Office Of Education

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Summary

Country	South Korea
Domain	sen.go.kr
ASN	AS23579
Registry	APNIC
ID	SERIICENTER

WHOIS Details

inetnum:        103.157.158.0 - 103.157.159.255
netname:        SERIICENTER
descr:          SEOUL EDUCATION RESEARCH INFORMATION INSTITUTE
admin-c:        IM939-AP
tech-c:         IM939-AP
country:        KR
status:         ALLOCATED PORTABLE
mnt-irt:        IRT-KRNIC-KR
mnt-by:         MNT-KRNIC-AP
mnt-lower:      MNT-KRNIC-AP
last-modified:  2020-11-02T00:38:55Z
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 Jung-gu Sopa-ro
country:        KR
phone:          +82-2-6973-9985
e-mail:         center@sen.go.kr
nic-hdl:        IM939-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-11-18T01:58:02Z
source:         APNIC

inetnum:        103.157.158.0 - 103.157.159.255
netname:        SERIICENTER-KR
descr:          Seoul Education Research Information Institute
country:        KR
admin-c:        IM3375-KR
tech-c:         IM3375-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 Jung-gu Sopa-ro
address:        Seoul Education Research Information Institute
country:        KR
phone:          +82-2-6973-9985
e-mail:         center@sen.go.kr
nic-hdl:        IM3375-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

Nearby Ranges

BGP prefixes that overlap with 103.157.0.0/16

Range	ASN	Company	Num of IPs
103.157.42.0/23	AS131642	Pittqiao Network Information Co.,Ltd.	512
103.157.230.0/23	AS132296	Liberty Digital Services	512
103.157.44.0/23	AS132877	Kalash Services Pvt Ltd	512
103.157.124.0/23	AS132926	Allen Career Institute	512
103.157.166.0/23	AS133301	Kernel Fibernet Online Network Pvt Ltd	512
103.157.52.0/23	AS134858	Iana Solutions Digital India	512
103.157.216.0/23	AS135905	SAIGON TELECOMMUNICATIONS TECHNOLOGY SOLUTIONS COMPANY	512
103.157.204.0/23	AS135918	SPR Viet Nam Joint Stock Company	512
103.157.224.0/23	AS136171	Dhruva Cloud	512
103.157.240.0/23	AS136697	Electro Service And Advertiser	512
103.157.116.0/23	AS137331	PT Ratna Sejahtera Abadi	512
103.157.90.0/23	AS137880	Prime Tech Solution Pvt Ltd	512
103.157.178.0/23	AS138296	Ibroadband Internet Service	512
103.157.18.0/23	AS140747	Department of Science and Technology of Dong Nai province	512
103.157.32.0/23	AS141109	PT Omni Cloud Indonesia	512
103.157.76.0/23	AS141112	PT Akses Satu Nusantara	512
103.157.78.0/23	AS141114	PT Super Media Indonesia	512
103.157.192.0/23	AS141122	PT Aneka Siak Nusantara	512
103.157.180.0/23	AS141246	9 Stars Giga Fibernet Pvt Ltd	512
103.157.186.0/23	AS141324	Hightec Network Solutions (OPC) Private Limited.	512
103.157.66.0/23	AS141343	Zeta Technologies (Pvt.) Limited	512
103.157.94.0/23	AS141346	Mohammad Khalid Haider Khan t/a Computer Future	512
103.157.92.0/23	AS141351	SABRI SHAHARIAR SAJIB t/a Rural Development Project Network	512
103.157.108.0/23	AS141353	ANGLO AMERICAN METALLURGICAL COAL PTY LTD	512
103.157.202.0/23	AS141375	Central Internet Link	512
103.157.150.0/23	AS142511	A S Communication	512
103.157.218.0/23	AS149118	3S Viet Nam Technology Joint Stock Company	512
103.157.112.0/23	AS149240	Afi Enterprises	512
103.157.246.0/23	AS150341	MUDAFA FIBER NET	512
103.157.114.0/23	AS17995	PT Trihalim Sembada	512
103.157.190.0/23	AS17995	PT Murni Kasih Bangsa	512
103.157.110.0/23	AS18250	GEEK NETWORKS PTY LIMITED	512
103.157.42.0/23	AS203548	Pittqiao Network Information Co.,Ltd.	512
103.157.184.0/23	AS55342	Homenet	512
103.157.64.0/23	AS56239	PT Graha Anugrah Sejahtera	512
103.157.82.0/23	AS58369	PT Linksindo Makmur	512
103.157.242.0/23	AS63784	Digital Agency	512
103.157.48.0/23	AS63859	PT Integrate Digital Indonesia	512
103.157.244.0/23	AS7492	NEXON PTY LTD t/a Nexware	512
103.157.34.0/24	AS141240	Nepal Investment Bank Limited	256
103.157.133.0/24	AS141241	T-way Network	256
103.157.147.0/24	AS397994	Xactly Technologies India Private Limited	256
103.157.16.0/24	AS141253	Zoram Internet Provider Pvt Ltd	256
103.157.99.0/24	AS45625	LTIMINDTREE LIMITED	256
103.157.103.0/24	AS45671	INTERAKT IT PTY LTD	256
103.157.74.0/24	AS141345	Modhumoti Bank Ltd.	256
103.157.68.0/24	AS45671	Net Ninjas Pty Ltd	256
103.157.88.0/24	AS141347	7Star Telecom	256
103.157.252.0/24	AS4648	Fulton Hogan Limited	256
103.157.84.0/24	AS4826	FIS SYSTEMS PTY LTD	256

Hosted domains

There are 17 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
103.157.158.110	software.hs.kr	12
103.157.158.130	serii.re.kr	3
103.157.158.134	webzine-serii.re.kr	1
103.157.158.160	jinhak.or.kr	1

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
103.157.158.151	AS23579 Seoul Metropolitan Office Of Education	`1.57ms` 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
208.59.137.248	AS6079 RCN	`6.53ms` from Chicago, US
18.252.148.24	AS8987 Amazon Data Services Ireland Ltd	`0.88ms` from Columbus, US
14.177.163.248	AS45899 VNPT Corp	`1.15ms` from Hanoi, VN
216.71.160.200	AS393640 Otava, LLC	`0.66ms` from Indianapolis, US
81.135.238.88	AS2856 British Telecommunications PLC	`3.52ms` from London, GB
69.105.248.200	AS7018 AT&T Enterprises, LLC	`3.58ms` from Los Angeles, US
180.194.156.72	AS9299 Philippine Long Distance Telephone Company	`19.29ms` from Manila, PH
35.186.197.184	AS396982 Google LLC	`0.07ms` from Melbourne, AU
88.191.80.8	AS12322 Free SAS	`10.64ms` from Paris, FR
75.25.129.248	AS7018 AT&T Enterprises, LLC	`19.74ms` from San Jose, US
187.233.53.24	AS8151 UNINET	`11.42ms` from Santiago de Queretaro, MX
202.247.30.168	AS2518 BIGLOBE Inc.	`4.73ms` from Tokyo, JP
120.74.106.152	AS2527 Sony Network Communications Inc.	`8.02ms` from Tokyo, JP
196.185.212.104	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`10.65ms` from Tunis, TN
109.197.100.136	AS50661 Telkab sp. z o.o.	`9.01ms` from Warsaw, PL
36.103.167.136	AS4134 CHINANET-BACKBONE	`0.19ms` from Zhongwei, CN
23.62.53.104	AS20940 Akamai International B.V.	`0.42ms` from Auckland, NZ
93.199.78.152	AS3320 Deutsche Telekom AG	`6.21ms` from Frankfurt am Main, DE
65.62.119.136	AS8011 MongoDB, Inc.	`0.10ms` from Frankfurt am Main, DE
125.120.64.168	AS4134 CHINANET-BACKBONE	`6.90ms` from Hangzhou, CN
42.114.190.56	AS18403 FPT Telecom Company	`1.30ms` from Ho Chi Minh City, VN
211.54.122.120	AS4766 Korea Telecom	`1.29ms` from Incheon, KR
196.192.61.8	AS328632 RTS Net Pty Ltd	`9.52ms` from Johannesburg, ZA
31.113.209.104	AS2856 British Telecommunications PLC	`3.59ms` from London, GB
95.238.38.56	AS3269 Telecom Italia S.p.A.	`6.03ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 -f3 -m8 103.157.158.80

traceroute to 103.157.158.80 (103.157.158.80): 8 hops max, 52 byte packets

3 [AS38623] 36.37.253.110 0.303 ms

4 *

5 [AS38623] 36.37.255.208 0.471 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Phnom Penh, KH

On January 30th 2026

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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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