Autonomous system
AS9946 CABLENET-AS-KR KCTV JEJU BROADCASTING
Residential ARIN Cable/DSL/ISP
Summary
KCTV Jeju Broadcasting
isp residential legacy
AS9946 (CABLENET-AS-KR) is held by KCTV Jeju Broadcasting (KCTV 제주방송), the cable television and broadband operator for Jeju Island. It is the island's local system operator, running cable TV and cable internet under the kctvjeju.com domain.
What it's used for
This is a regional residential access network. RIS sees 131 IPv4 prefixes carrying 116,736 addresses and no IPv6. One large aggregate, 27.100.128.0/17, holds about half the total; the rest is a long tail of /22s spread across 112.133.x, 122.202.x and 144.48.x — allocations picked up separately over the years rather than as one contiguous block, which is the usual pattern for a Korean cable SO that grew its subscriber base incrementally.
Two observed neighbours is the decisive signal. Over a hundred thousand addresses reached through only two BGP adjacencies means this network exists to serve its own customers, not to carry anyone else's traffic. A wholesale or transit operator with this much address space would show dozens of peers; two says KCTV Jeju buys upstream connectivity from mainland Korean carriers and terminates it in Jeju households and businesses.
Notable
- Jeju is a self-contained island market, and KCTV is its incumbent cable operator — a rare case where an AS maps almost exactly onto a single geographic region.
- Broadcast-first companies becoming significant broadband ISPs is a distinctly South Korean pattern; KCTV Jeju sits alongside operators such as AS9943 (KangNam Cable TV) as a regional cable SO holding its own ASN and a six-figure address block.
- No IPv6 announced, which is a common gap among Korea's regional cable operators even as the national carriers have deployed it.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Korea Internet Neutral Exchange KINX | Seoul, South Korea | 139.150.100.96 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 59 prefixes · 117K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 59 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS9946- Registry name
- CABLENET-AS-KR-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 2000-04-14
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- KCTV JEJU BROADCASTING
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
- Present at
- 1 exchanges
- Website
- http://www.kctvjeju.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 131 with no ROA
- ROAs
- 0 authorising AS9946
- ASPA
- no ASPA record
- IRR
- 100% registered · 131 of 131 announcements
- Route objects
- 161 naming AS9946
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,775 prefixes, as published 2026-10-11. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere