AS15146 CABLEBAHAMAS

A national cable operator whose sampled addresses return no names at all.

What it's used for

• The country's cable and broadband operator. Twenty-five IPv4 prefixes and one IPv6 /32 announced from the Bahamas, close to a hundred thousand addresses, with nineteen observed BGP neighbours.

Notable

• Eighteen addresses spread across the network were queried for reverse DNS and none returned a name.
• Most blocks carry the single netname CABLEBAHAMAS-NET, with two exceptions: INDIGO-CBL-NET-69-4-160-0-20 puts a consumer brand ahead of the address, and NET4-206-138-16-0-PL20 writes the prefix length as a marked segment at the end.
• Two registry lookups failed, so those blocks' ownership is unknown rather than absent.
• One registrant field appends a network operations contact with a semicolon; the rest do not.
• Eight of the prefixes are pieces of the same 64.66 range, split down to individual /24 blocks.

Interesting

• A residential broadband network with no reverse names is unusual and consequential. Subscriber addresses without names are treated more harshly by mail systems and by anything that scores an address on how completely it is described, and every customer on this network inherits that.
• Marking the prefix length with letters, rather than leaving a bare trailing number, is the clearest version of that habit seen in this range. It removes the ambiguity between a length and a counter, which most netnames here leave unresolved.
• Nineteen upstreams for an island operator is a lot, and it is what carrying a country's traffic across submarine paths costs in relationships.