210.121.72.0/21

AS45374 · CCS

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Summary

Country	South Korea
Domain	sejongnetworks.com
ASN	AS45374
Parent Range	210.121.0.0/17
Registry	APNIC
ID	SHINBIRO

WHOIS Details

inetnum:        210.121.0.0 - 210.121.127.255
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:  2024-09-10T08:50:08Z
source:         APNIC

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

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

Overlapping Ranges

BGP prefixes that contain 210.121.72.0/21

Range	ASN	Company	Num of IPs
210.121.0.0/17	AS45374	SEJONG NETWORKS	32,768
210.121.0.0/17	AS9848	SEJONG NETWORKS	32,768

Nearby Ranges

BGP prefixes that overlap with 210.121.0.0/16

Range	ASN	Company	Num of IPs
210.121.128.0/17	AS10058	Korea Telecom	32,768
210.121.128.0/17	AS152290	Korea Telecom	32,768
210.121.128.0/17	AS18176	Korea Telecom	32,768
210.121.128.0/17	AS38676	Korea Telecom	32,768
210.121.0.0/17	AS45374	SEJONG NETWORKS	32,768
210.121.128.0/17	AS4766	Korea Telecom	32,768
210.121.128.0/17	AS55627	Korea Telecom	32,768
210.121.0.0/17	AS9848	SEJONG NETWORKS	32,768

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

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

IP Address	ASN	Details
210.121.78.219	AS45374 CCS	`3.43ms` from Incheon, KR
210.121.74.187	AS45374 CCS	`3.64ms` from Incheon, KR
210.121.72.57	AS45374 CCS	`4.72ms` from Incheon, KR
210.121.76.1	AS45374 CCS	`5.04ms` from Seoul, KR
210.121.77.119	AS45374 CCS	`5.10ms` from Incheon, KR
210.121.79.137	AS45374 CCS	`3.79ms` from Incheon, KR
210.121.73.173	AS45374 CCS	`3.81ms` 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
68.62.233.101	AS7922 Comcast Cable Communications, LLC	`16.53ms` from Atlanta, US
50.56.11.37	AS19994 Rackspace Hosting	`1.21ms` from Chicago, US
86.106.219.213	AS8926 Moldtelecom SA	`2.79ms` from Chisinau, MD
20.15.180.229	AS8075 Microsoft Corporation	`0.17ms` from Des Moines, US
103.102.139.165	AS137029 Chittagong multi channel limited,	`3.53ms` from Dhaka, BD
185.53.216.5	AS28876 suec // dacor GmbH	`3.74ms` from Frankfurt am Main, DE
23.248.213.245	AS138415 Yancy Limited	`0.69ms` from Hong Kong, HK
219.240.252.213	AS9318 SK Broadband Co Ltd	`1.78ms` from Incheon, KR
69.140.159.21	AS7922 Comcast Cable Communications, LLC	`8.39ms` from Manassas, US
202.175.223.149	AS9658 Eastern Telecoms Phils., Inc.	`0.24ms` from Manila, PH
74.76.152.37	AS11351 Charter Communications Inc	`14.72ms` from New York City, US
179.162.254.149	AS18881 TELEFÔNICA BRASIL S.A	`12.06ms` from Sao Paulo, BR
222.251.164.197	AS23563 SK Broadband Co Ltd	`2.37ms` from Seoul, KR
106.244.109.85	AS3786 LG DACOM Corporation	`1.74ms` from Seoul, KR
92.247.9.101	AS8717 A1 Bulgaria EAD	`0.27ms` from Sofia, BG
85.229.49.21	AS8434 Telenor Sverige AB	`1.10ms` from Stockholm, SE
223.112.173.181	AS56046 China Mobile communications corporation	`3.87ms` from Suzhou, CN
114.39.20.21	AS3462 Data Communication Business Group	`3.96ms` from Taichung, TW
221.239.100.229	AS17638 ASN for TIANJIN Provincial Net of CT	`4.17ms` from Tianjin, CN
62.231.107.69	AS8708 DIGI ROMANIA S.A.	`4.39ms` from Timisoara, RO
92.68.13.21	AS1136 KPN B.V.	`2.52ms` from Amsterdam, NL
40.68.72.149	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
206.174.93.101	AS8047 GENERAL COMMUNICATION, INC.	`14.07ms` from Anchorage, US
216.94.213.101	AS701 Verizon Business	`12.13ms` from Ashburn, US
20.51.144.149	AS8075 Microsoft Corporation	`0.44ms` from Ashburn, US

Traceroute

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

traceroute -a -n -q1 -f2 210.121.73.27

traceroute to 210.121.73.27 (210.121.73.27): 64 hops max, 52 byte packets

2 [AS47447] 212.83.33.9 1.176 ms

3 [AS47447] 62.113.192.67 0.413 ms

4 [] 80.81.196.114 0.833 ms

5 *

6 *

7 *

8 *

9 [AS9848] 211.239.202.130 225.936 ms

10 [AS9848] 211.239.202.90 242.062 ms

11 *

12 *

13 *

14 *

15 [AS45374] 210.121.73.27 244.654 ms

Measurement taken from

IPinfo ProbeNet in Frankfurt am Main, DE

On January 30th 2026

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