AS14615 ROCK-HILL-TELEPHONE

The reverse names publish the access technology, the town and the state, and one of them publishes the wrong address.

What it's used for

• A regional telephone and broadband company. 180,736 addresses across 102 IPv4 prefixes plus 17 IPv6 prefixes, with 20 observed BGP neighbours.

Notable

• Almost every block carries the netname RHTC, matching the AS handle ROCK-HILL-TELEPHONE.
• 68.235.224.0/19 is the exception, with the netname COMPORIUM-BREVARD.
• Every registrant record lists an abuse contact and a Special Services Test Center alongside the company.
• Six of eighteen sampled addresses returned a name. Five sit under comporium.net, one under citcom.net.
• The names encode the access type and the site: fttp.glbrsc, cm.ftmlsc, ded.rkhlsc and dsl.brvdnc, each followed by dyn, stat or dynamic.
• The registry lookup for 67.197.128.0/19 failed.

Interesting

• 67.197.247.254 answers with the name 67-167-247-254.fttp.chsnsc.dyn.comporium.net. The second octet in the name is 167 where the address is 197, so the record is one digit wrong and has stayed wrong. Reverse names are generated from a template and almost never checked against the address they describe.
• Four of the five site codes end in sc and the odd one ends in nc. That block is also the one with its own netname and its own domain, which is what an acquisition across a state line looks like when nobody merges the naming.
• A name saying fttp or dsl, plus dyn or stat, tells an outsider what kind of line an address is and whether it moves. That comes out of the provisioning system, not out of anyone choosing to disclose it.