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The Solid Clues Imperfect List of SBC Dynamic DSL and Dialup Space

This list is published solely to disclose Solid Clues Consulting policy which may impede mail to Solid Clues Consulting addresses. There is no publicly disclosed DNS zone carrying this data and it would be highly questionable for any other site to attempt to use this list without independent validation. As a compilation of public data from ARIN, this list is probably not protectable by copyright, but if you are found asking for it at a rate that I am convinced indicates that you are leeching off my work, I will almost certainly start doing what I can within the bounds of law and ethics to demonstrate the rudeness and recklessness of your behavior. I have mod_rewrite and I know how to use it. :)

The list below shows all the IP address ranges that I believe to be assigned dynamically by SBC to their dialup and DSL customers. Note that I DO NOT intend to list any space assigned statically by SBC as an explicit term of service. If you are buying 'static' service from SBC and are on this list PLEASE email the list maintenance address with some evidence for the range you are in being statically assigned. Note that non-generic reverse DNS entries are the most definitive sign to me that a listing here is wrong. PLEASE also contact me at that address before linking to this page, particularly from sites that have high traffic.

This list IS NOT intended to list "bad" or "spammy" addresses. It is not intended to say anything derogatory about SBC, in fact it is only because SBC does a relatively good job of maintaining their SWIP records in a responsible fashion that this list is possible. If other large providers were as conscientious to the community good and open about their use of the public resource of IPv4 space, the net would be a far better place. SBC has their own list because:

  1. They provide dynamically assigned space in very large quantities
  2. They register SWIP records at ARIN which mostly follow patterns that indicate which ranges are dynamically assigned
  3. They operate their network and business in such a way which makes it inevitable that their dynamically assigned space generates immense volumes of abusive traffic.
  4. The spam volume here from their network (before they instituted port 25 blocking) was so large that their ranges were making up a significant slice of my main local blacklist and I was doing ad hoc additions of their space daily.

The only fact in that list which sets SBC apart from their direct competition and their sibling RBOC's is their community-friendly SWIP policy

The current SBC dynamic address list, last changed

(If that's a long time ago, this is probably out of date)