Another ISP with the right idea: floodcity.net. Clearly delineated both assignment type (in the right MST position) and technology:
One which has sort of the right idea: musfiber.com
Unfortunately, they've also done this to delineate their pools:
In the original RFC that defines the limitations on DNS labels, RFC 1035, names are limited to alphanumeric ASCII characters and a hyphen:
The labels must follow the rules for ARPANET host names. They must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen. There are also some restrictions on the length. Labels must be 63 characters or less.
The 63-character length limit has been eased, and some movement towards i18n has been made, with the introduction of punycode, RFC 3492, but even punycode limits itself to alphanumeric ASCII and the hyphen while encoding the other characters. So, as with underscores, octothorpes (aka "hash marks", AKA "sharps", AKA "pound sign", etc.) are non grata in DNS labels.
And yet, they show up occasionally, as in one of my favorite abuses of the DNS ever (blissfully now repurposed as a Windstream dynamic IP with sensible PTR naming):
On the bright side, they did give you a phone number to call. To report network abuse. Excelsior!
Posted by schampeo at June 25, 2009 2:24 PM