61.100.0.0/20

AS9952 · Hostway IDC

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Summary

Country	South Korea
Domain	sejongnetworks.com
ASN	AS9952
Parent Range	61.100.0.0/17
Registry	APNIC
ID	SEJONG-KR

WHOIS Details

inetnum:        61.100.0.0 - 61.100.127.255
netname:        SEJONG
descr:          SEJONG NETWORKS
country:        KR
admin-c:        IM686-AP
tech-c:         IM686-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2025-11-03T05:34:02Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        9, Jinheung-gil, Naju-si, Jeollanam-do
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:  2025-09-04T01:00:01Z
source:         APNIC

person:         IP Manager
address:        12 Gwacheon-daero 7-gil, Gwacheon-si, Gyeonggi-do
country:        KR
phone:          +82-2-1688-2200
e-mail:         ip@sejongnetworks.com
nic-hdl:        IM686-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-09-10T08:42:02Z
source:         APNIC

inetnum:        61.100.0.0 - 61.100.127.255
netname:        SEJONG-KR
descr:          SEJONG NETWORKS
country:        KR
admin-c:        IA10-KR
tech-c:         IM10-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.
source:         KRNIC

person:         IP Manager
address:        12 Gwacheon-daero 7-gil, Gwacheon-si, Gyeonggi-do
address:        (Galhyeondong)
country:        KR
phone:          +82-2-1688-2200
e-mail:         ip@sejongnetworks.com
nic-hdl:        IA10-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:        12 Gwacheon-daero 7-gil, Gwacheon-si, Gyeonggi-do
address:        (Galhyeondong)
country:        KR
phone:          +82-2-1688-2200
e-mail:         ip@sejongnetworks.com
nic-hdl:        IM10-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

Overlapping Ranges

BGP prefixes that contain 61.100.0.0/20

Range	ASN	Company	Num of IPs
61.100.0.0/17	AS152294	SEJONG NETWORKS	32,768
61.100.0.0/17	AS9952	SEJONG NETWORKS	32,768
61.100.0.0/17	AS9947	SEJONG NETWORKS	32,768
61.100.0.0/17	AS9848	SEJONG NETWORKS	32,768

BGP prefixes that are contained by 61.100.0.0/20

Range	ASN	Company	Num of IPs
61.100.12.0/24	AS9952	Hostway	256
61.100.13.0/24	AS9952	Hostway	256

Nearby Ranges

BGP prefixes that overlap with 61.100.0.0/16

Range	ASN	Company	Num of IPs
61.100.0.0/17	AS9947	SEJONG NETWORKS	32,768
61.100.0.0/17	AS9848	SEJONG NETWORKS	32,768
61.100.0.0/17	AS152294	SEJONG NETWORKS	32,768
61.100.0.0/17	AS9952	SEJONG NETWORKS	32,768
61.100.128.0/18	AS9848	SEJONG NETWORKS	16,384
61.100.128.0/18	AS9952	SEJONG NETWORKS	16,384
61.100.192.0/19	AS18310	SK Broadband Co Ltd	8,192
61.100.40.0/21	AS131866	Digital Edge Korea	2,048
61.100.48.0/21	AS131866	Digital Edge Korea	2,048
61.100.240.0/21	AS45372	ULNetworks Co., Ltd.	2,048
61.100.29.0/24	AS38676	FLEXNET	256
61.100.28.0/24	AS38676	FLEXNET	256
61.100.27.0/24	AS38676	FLEXNET	256
61.100.26.0/24	AS38676	FLEXNET	256
61.100.12.0/24	AS9952	Hostway	256
61.100.25.0/24	AS38676	FLEXNET	256
61.100.13.0/24	AS9952	Hostway	256
61.100.183.0/24	AS9952	Hostway	256
61.100.185.0/24	AS9952	Hostway	256
61.100.186.0/24	AS9952	Hostway	256

Hosted domains

There are 1,278 domain names hosted across 181 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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

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

IP Address	ASN	Details
61.100.2.37	AS9952 Hostway IDC	`1.03ms` from Seoul, KR
61.100.15.17	AS9952 Hostway IDC	`0.94ms` from Seoul, KR
61.100.7.148	AS9952 Hostway IDC	`1.02ms` from Seoul, KR
61.100.10.169	AS9952 Hostway IDC	`1.00ms` from Seoul, KR
61.100.4.129	AS9952 Hostway IDC	`1.00ms` from Seoul, KR
61.100.3.139	AS9952 Hostway IDC	`0.99ms` from Seoul, KR
61.100.13.145	AS9952 Hostway IDC	`1.05ms` from Seoul, KR
61.100.9.35	AS9952 Hostway IDC	`0.99ms` from Seoul, KR
61.100.1.148	AS9952 Hostway IDC	`1.06ms` from Seoul, KR
61.100.6.126	AS9952 Hostway IDC	`1.02ms` from Seoul, KR
61.100.11.196	AS9952 Hostway IDC	`1.29ms` from Seoul, KR
61.100.12.218	AS9952 Hostway IDC	`1.00ms` from Seoul, KR
61.100.0.68	AS9952 Hostway IDC	`0.96ms` from Seoul, KR
61.100.5.22	AS9952 Hostway IDC	`1.07ms` from Seoul, KR
61.100.14.7	AS9952 Hostway IDC	`1.04ms` 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
85.145.147.84	AS50266 Odido Netherlands B.V.	`5.72ms` from Amsterdam, NL
69.18.63.116	AS12133 Local Internet Service Company	`7.46ms` from Des Moines, US
207.49.190.180	AS19901 Brightspeed	`4.05ms` from Durham, US
138.36.112.20	AS264576 I. C. JADÃO	`13.69ms` from Fortaleza, BR
171.229.125.116	AS7552 Viettel Group	`2.50ms` from Hanoi, VN
14.198.65.4	AS10103 HK Broadband Network Ltd.	`0.39ms` from Hong Kong, HK
160.119.197.20	AS328171 TREFOIL NETWORKS LTD	`11.04ms` from Lagos, NG
143.166.206.196	AS3614 Dell, Inc.	`5.24ms` from Los Angeles, US
85.50.92.84	AS12479 Orange Espagne SA	`9.32ms` from Madrid, ES
24.56.119.132	AS4922 Shenandoah Cable Television LLC	`12.48ms` from Manassas, US
98.252.45.36	AS7922 Comcast Cable Communications, LLC	`8.70ms` from Manassas, US
96.23.53.164	AS5769 Videotron Ltee	`9.08ms` from Montreal, CA
191.8.4.228	AS27699 TELEFÔNICA BRASIL S.A	`12.97ms` from Sao Paulo, BR
24.47.1.164	AS6128 Cablevision Systems Corp.	`7.03ms` from Secaucus, US
115.196.73.212	AS4134 CHINANET-BACKBONE	`8.63ms` from Shanghai, CN
52.199.144.36	AS16509 Amazon.com, Inc.	`0.20ms` from Tokyo, JP
90.152.206.148	AS8562 A1 Telekom Austria AG	`8.47ms` from Vienna, AT
125.45.49.132	AS4837 CHINA UNICOM China169 Backbone	`6.62ms` from Zhengzhou, CN
84.84.10.68	AS1136 KPN B.V.	`0.97ms` from Amsterdam, NL
35.86.20.20	AS16509 Amazon.com, Inc.	`0.20ms` from Boardman, US
74.103.193.196	AS701 Verizon Business	`2.44ms` from Boston, US
217.136.97.196	AS5432 Proximus NV	`1.17ms` from Brussels, BE
3.135.96.212	AS16509 Amazon.com, Inc.	`0.18ms` from Columbus, US
35.238.209.164	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
114.28.219.100	AS142132 263 Global Communications Limited	`1.25ms` from Hong Kong, HK

Traceroute

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

traceroute -a -n -q1 -f4 61.100.4.79

traceroute to 61.100.4.79 (61.100.4.79): 64 hops max, 52 byte packets

4 [AS9848] 203.231.88.65 1.042 ms

5 [AS9848] 211.115.197.94 0.992 ms

6 [AS9848] 61.109.130.226 1.154 ms

7 *

8 *

9 [AS9952] 61.100.4.89 1.378 ms

10 [AS9952] 61.100.4.79 1.609 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 9th 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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