AS9812 CNNIC-CN-COLNET Oriental Cable Network Co., Ltd.

AS9812 (CNNIC-CN-COLNET) is held by Oriental Cable Network Co., Ltd (东方有线), the cable operator for Shanghai. OCN runs the city's cable-television metropolitan network and sells broadband over it under the Cable Plus brand; this AS is the eyeball network behind that service.

What it's used for

RIS sees 137 IPv4 prefixes carrying 1,785,856 addresses, 8 IPv6 prefixes, and only 4 BGP neighbours. That ratio is the definition of an access network: nearly 1.8 million addresses is a serious residential footprint, but four neighbours means it sells nothing wholesale and simply buys transit to get its own subscribers to the internet. The inventory backs it up — three /16s and a long tail of /17s and /18s (219.233, 223.248–223.251, 218.242, 124.151, 111.214, 60.63, 58.25 and more), the contiguous, heavily-aggregated space of a single metro operator rather than a scatter of acquired blocks. Sampled reverse DNS lands consistently on reserve.cableplus.com.cn across several unrelated prefixes, tying the space directly to OCN's own broadband brand.

Notable

• The CNNIC-CN-COLNET handle is a CNNIC-era label and does not name the operator — the identity comes from the Cable Plus rDNS and the registry holder, not the handle.
• IPv6 is deployed: eight prefixes including 2400:6600::/32 and 2401:800::/33, unusual for a Chinese cable operator of this generation.
• This is cable-plant broadband, distinct from Shanghai Telecom or Unicom's telco networks in the same city.