AS7623 — HCNGYEONGBUK-AS-KR Gyeongbuk Cable TV

Network type: residential

AS7623 announces 33 IPv4 prefixes covering 83,456 addresses and 0 IPv6 prefixes.

About this network

HCNGYEONGBUK-AS-KR is the Gyeongbuk regional arm of HCN, a South Korean cable multi-system operator. Based in Pohang, it serves North Gyeongsang Province with cable television and broadband.

What it's used for

• Consumer cable broadband. The ASN announces roughly 84 prefixes, almost all /22s, scattered across 27.35.x, 39.126.x, 49.142-143.x, 110.35.x, 111.118.x, 114.30.x, 114.199.x, 115.69.x, 118.91.x and 122.202.x — around 83,000 addresses in total.
• That inventory shape is characteristic of a regional cable operator: many small, non-contiguous subscriber blocks acquired over time as the footprint grew, rather than one large clean allocation.

Notable

• This is eyeball address space. Traffic from it is residential cable-modem subscribers in and around Pohang, not hosting or corporate systems.
• Reverse DNS is essentially absent across the whole range, which is normal for Korean cable operators but means the registry records rather than the DNS are what identify it.

Interesting

• The holder has changed hands and names repeatedly while the ASN and its handle stayed put. It began as Hyundai HCN ("HY Communication & Network"), was bought by KT Skylife in 2021 for around 491 billion won, was rebranded simply HCN (re-glossed as "Hyper-Connected Network"), and became KT HCN in March 2025. The APNIC name still reads "Gyeongbuk Cable TV".

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 27.35.112.0/20
• 39.126.21.0/24
• 39.126.22.0/24
• 39.126.196.0/22
• 39.126.200.0/22
• 39.126.204.0/23
• 39.126.214.0/23
• 39.126.216.0/21
• 49.142.80.0/20
• 49.142.112.0/20
• 49.142.176.0/22
• 49.142.196.0/22
• 49.142.216.0/21
• 49.142.224.0/20
• 49.142.240.0/22
• 49.142.248.0/21
• 49.143.0.0/21
• 49.143.12.0/22
• 49.143.24.0/21
• 49.143.36.0/22
• 49.143.40.0/22
• 49.143.56.0/22
• 49.143.68.0/22
• 49.143.72.0/22
• 49.143.116.0/22
• 110.35.224.0/19
• 111.118.112.0/20
• 114.30.48.0/20
• 114.199.224.0/19
• 115.69.96.0/19
• 118.91.48.0/20
• 120.50.104.0/21
• 122.202.48.0/20

Upstream networks

• AS7562 HCN Dongjak

Adjacent networks

• AS7562 HCN Dongjak