1. Found a list of .us reserved domains at:

http://www.nic.us/registrars/fcfs/dotus_reservedlist_v3.zip

2. The list has 50k domains at 1 MB of text uncompressed, so it will probably be somewhat impractical to use on the client side.

3. It only needs to be processed on the data side to make sure none of the .us ccTLDs gets into the SRUBLs, and that's now in place.

4. There are very many more reserved domains as described at: http://www.nic.us/faqs/index.html#list_reserved_names as:

Where can I see a list of reserved .US names? See http://www.neustar.us/registrars/. In addition to the specific names contained in this reserved name file, the following categories of names are also reserved:

* All numbers five digits and higher
* All numbers in the format five digits-four digits (zip codes)
* All telephone numbers including toll-free numbers
* Tagged domain names—all labels with hyphens in the third

and fourth character positions (e.g. "bq--kn2n4h4b")

5. It's very unlikely that any of these geographic or reserved domains will become a major source of spam hosting. I don't envision city or country registrars handing subdomains under reserved domains to random spammers. I had a heck of a time trying to get the late, lamented Jon Postel to let the City of Mountain View change theirs from mtview or mtnview to mountainview.... I know things are different now, but I still doubt reserved subdomains are going to be handed out like Mardi Gras candy or anything like that. :-)

6. Note that none of this prevents spammerdomain.us from getting onto the blocklists. That will still happen as it should.

Jeff C.