AS9976 ICNDP-AS-KR Namincheon Brodcasting Co., Ltd.

AS9976 (ICNDP-AS-KR) is held by Namincheon Brodcasting Co., Ltd. (남인천방송, NIB), a regional cable system operator serving the Michuhol-gu and Yeonsu-gu districts of Incheon, South Korea. Alongside cable television it sells the usual Korean SO triple play: broadband internet and internet telephony. This AS is the broadband side of that business.

What it's used for

The routing shape is a classic mid-size eyeball access network. RIS sees 11 announced IPv4 prefixes carrying 92,160 addresses, no IPv6, and only 4 observed BGP neighbours. That combination is the tell: roughly 90,000 addresses is far more than any enterprise needs, but four neighbours is far too few for a wholesale carrier. It is a network that hands nearly all of its address space to its own subscribers and buys transit from a small number of upstreams. The blocks themselves are consistent with that reading: several /18s and /19s in Korean APNIC space (115.126.192.0/18, 183.91.192.0/18, 118.103.192.0/19, plus a run of /19s in 203/211/210 space) allocated in sizes appropriate to a cable modem pool rather than to servers.

Notable

• Incheon's cable market consolidated heavily into the large groups; NIB is the notable holdout that stayed independent, so its address space is not folded into a national operator's AS.
• The lack of any IPv6 announcement is worth flagging: subscribers on this network are IPv4-only from a BGP point of view.
• The ICNDP handle bears no relation to the company's public name, which is a good reminder that the RIR handle is not evidence of identity.