Korea Telecom

Data as of 2026-08-16
BGP inherited
Complete entity footprint
2 linked clusters · 5,074 netblocks · 47,421,835 IPv4 addresses · 73 IPv6 prefixes
This organisation's clusters combined by evidence — shared operating domain gwangjin.go.kr — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
Cluster stats
Netblocks3,367 · 47,241,643 IPv4 addresses
IPv6 67 prefixes (largest 2400::/20)
Registered in South Korea (2,886) · United States (64) · United Kingdom (17) · United Arab Emirates (13) · Hong Kong (5) · Israel (3)
Cluster ID222311226
RegistryBGP
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 28 shared RIR contact/maintainer handles
Registry names 4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

8 weekly snapshots · JSON
3,371 -26 netblocks since 2026-07-05
2026-07-05 peak 3,397 2026-08-16

IP Ranges (3,367)

showing 50 of 3,367 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
14.49.22.0/24 Korea Telecom BGP ANNOUNCED ● high
27.255.96.0/21 KOREA CABLE TELECOM BGP ANNOUNCED ● high
27.255.100.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
27.255.105.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
49.238.228.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
49.238.229.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
49.238.230.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
61.83.247.0/25 Korea Telecom BGP ANNOUNCED ● high
61.83.247.128/25 Korea Telecom BGP ANNOUNCED ● high
110.44.48.0/23 KOREA CABLE TELECOM BGP ANNOUNCED ● high
110.44.50.0/23 KOREA CABLE TELECOM BGP ANNOUNCED ● high
110.44.52.0/22 KOREA CABLE TELECOM BGP ANNOUNCED ● high
112.140.144.0/21 KOREA CABLE TELECOM BGP ANNOUNCED ● high
180.92.241.0/24 Korea Telecom BGP ANNOUNCED ● high
180.92.242.160/28 Korea Telecom BGP ANNOUNCED ● high
180.92.242.160/27 Korea Telecom BGP ANNOUNCED ● high
180.92.242.176/28 Korea Telecom BGP ANNOUNCED ● high
180.92.242.224/29 Korea Telecom BGP ANNOUNCED ● high
180.92.242.232/29 Korea Telecom BGP ANNOUNCED ● high
180.92.242.240/29 Korea Telecom BGP ANNOUNCED ● high
180.92.242.248/29 Korea Telecom BGP ANNOUNCED ● high
180.92.243.32/28 Korea Telecom BGP ANNOUNCED ● high
180.92.243.48/28 Korea Telecom BGP ANNOUNCED ● high
180.92.248.0/24 Korea Telecom BGP ANNOUNCED ● high
180.92.249.0/25 Korea Telecom BGP ANNOUNCED ● high
180.92.249.144/28 Korea Telecom BGP ANNOUNCED ● high
180.92.249.160/28 Korea Telecom BGP ANNOUNCED ● high
180.92.249.176/28 Korea Telecom BGP ANNOUNCED ● high
180.92.249.192/28 Korea Telecom BGP ANNOUNCED ● high
180.92.249.208/29 Korea Telecom BGP ANNOUNCED ● high
180.92.249.224/28 Korea Telecom BGP ANNOUNCED ● high
180.92.250.0/24 Korea Telecom BGP ANNOUNCED ● high
180.92.251.0/24 Korea Telecom BGP ANNOUNCED ● high
180.92.252.32/28 Korea Telecom BGP ANNOUNCED ● high
180.92.252.64/29 Korea Telecom BGP ANNOUNCED ● high
180.92.252.80/28 Korea Telecom BGP ANNOUNCED ● high
180.92.253.128/25 Korea Telecom BGP ANNOUNCED ● high
180.92.254.0/24 Korea Telecom BGP ANNOUNCED ● high
180.92.255.0/27 Korea Telecom BGP ANNOUNCED ● high
180.92.255.32/27 Korea Telecom BGP ANNOUNCED ● high
180.92.255.96/28 Korea Telecom BGP ANNOUNCED ● high
180.92.255.128/25 Korea Telecom BGP ANNOUNCED ● high
203.17.226.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
203.82.220.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
203.82.221.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
203.129.6.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
203.129.7.0/24 KOREA CABLE TELECOM BGP ANNOUNCED ● high
203.234.111.128/28 Korea Telecom BGP ANNOUNCED ● high
203.241.167.128/28 Korea Telecom BGP ANNOUNCED ● high
203.242.5.0/24 Korea Telecom BGP ANNOUNCED ● high

IPv6 ranges (67)

showing the 15 largest allocations
CIDR
2400::/20
2400:80::/25
2400:40::/26
2400:20::/27
2400:100::/28
2400:10::/28
2400:110::/28
2400:120::/28
2400:130::/28
2400:140::/28
2400:150::/28
2400:160::/28
2400:130::/30
2400:140::/30
2400:144::/30

Network trust

what's this?
RPKI hygiene: F how networks compare →
1.1% of checked blocks have valid RPKI ROA coverage (21 of 2,000, sampled from 3,371)
Possible discrepancies (3)

These blocks are registered to Korea Telecom but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

212.189.36.0/24 /24 authorized for AS9304 — HGC Global Communications Limited
217.60.3.0/24 /24 authorized for AS56971 — CGI GLOBAL LIMITED
217.60.7.0/24 /24 authorized for AS56971 — CGI GLOBAL LIMITED

NIC Handles

AR834 AS3257-IPAM-MNT AS3559 AS38424 AS401152 AS4040 AS45400 AS4766 AS49592 AS9304 CTL48-RIPE DUMY-RIPE +16 more