SEJONG NETWORKS

Data as of 2026-08-16
BGP inherited
Complete entity footprint
2 linked clusters · 242 netblocks · 1,455,622 IPv4 addresses · 11 IPv6 prefixes
This organisation's clusters combined by evidence — shared operating domain donghwan.co.kr — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
Cluster stats
Netblocks173 · 990,728 IPv4 addresses
IPv6 11 prefixes (largest 2001:3a8::/32)
Registered in South Korea (156) · United States (4) · Hong Kong (2)
Cluster ID222391401
RegistryBGP
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 3 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

8 weekly snapshots · JSON
173 +8 netblocks since 2026-07-05
2026-07-05 peak 173 2026-08-16

IP Ranges (173)

showing 50 of 173 — see all — ⬇ export CSV
CIDR Org name Registry Status Confidence
36.255.56.94/32 Sejong Networks PEERINGDB ASSIGNED ● high
36.255.56.191/32 Sejong Networks PEERINGDB ASSIGNED ● high
58.180.7.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
58.180.133.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
58.180.136.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
61.97.64.0/20 SEJONG NETWORKS BGP ANNOUNCED ● high
61.97.96.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
61.97.96.0/20 SEJONG NETWORKS BGP ANNOUNCED ● high
61.97.96.0/21 SEJONG NETWORKS BGP ANNOUNCED ● high
61.100.0.0/17 SEJONG NETWORKS BGP ANNOUNCED ● high
61.100.128.0/18 SEJONG NETWORKS BGP ANNOUNCED ● high
61.109.128.0/17 SEJONG NETWORKS BGP ANNOUNCED ● high
61.109.211.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
61.111.179.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
61.250.64.0/18 SEJONG NETWORKS BGP ANNOUNCED ● high
61.252.160.0/20 SEJONG NETWORKS BGP ANNOUNCED ● high
61.252.176.0/20 SEJONG NETWORKS BGP ANNOUNCED ● high
64.23.64.0/20 SEJONG NETWORKS BGP ANNOUNCED ● high
66.232.136.0/21 SEJONG NETWORKS BGP ANNOUNCED ● high
66.232.140.0/22 SEJONG NETWORKS BGP ANNOUNCED ● high
66.232.144.0/22 SEJONG NETWORKS BGP ANNOUNCED ● high
139.150.100.156/32 Sejong Networks PEERINGDB ASSIGNED ● high
139.150.100.157/32 Sejong Networks PEERINGDB ASSIGNED ● high
163.223.95.19/32 Sejong Networks PEERINGDB ASSIGNED ● high
163.223.95.20/32 Sejong Networks PEERINGDB ASSIGNED ● high
202.30.209.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.210.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.212.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.213.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.217.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.232.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.233.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.234.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.235.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.236.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.237.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.238.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.239.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.240.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.241.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.242.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.243.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
202.30.249.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
203.227.0.0/16 SEJONG NETWORKS BGP ANNOUNCED ● high
203.227.32.0/19 SEJONG NETWORKS BGP ANNOUNCED ● high
203.227.176.0/20 SEJONG NETWORKS BGP ANNOUNCED ● high
203.231.0.0/16 SEJONG NETWORKS BGP ANNOUNCED ● high
203.231.97.0/24 SEJONG NETWORKS BGP ANNOUNCED ● high
203.231.104.0/21 SEJONG NETWORKS BGP ANNOUNCED ● high
203.231.224.0/19 SEJONG NETWORKS BGP ANNOUNCED ● high

IPv6 ranges (11)

CIDR
2001:3a8::/32
2001:cf0::/32
2001:3a8:7000:0:114:0:9848:1/128
2001:3a8:7000:0:115:0:9848:1/128
2001:3a8:80b4:d::1/128
2001:7fa:8::256/128
2001:7fa:8::257/128
2001:de8:7::9848:1/128
2001:de8:7::9848:2/128
2401:f560::19/128
2401:f560::20/128

Customer-delegated space

how is this classified?
Unclassified 157 (90.8%)
Operator infrastructure (named) 16 (9.2%)

Network trust

what's this?
RPKI hygiene: F how networks compare →
2.3% of checked blocks have valid RPKI ROA coverage (4 of 173)
No discrepancies found among checked blocks.

NIC Handles

AS38425 AS9848 AS9848