What a terrible reason. This is a failing of the .com and .net registries, not of the TLD itself. Verisign's new systems, slated to go live later this year, will remove this problem, and give 5-minute update times.

I'm not disagreeing that .mobi is a fine idea, mind you. I think all TLDs should be given a chance. But the author's technical reason is meaningless, if not non-sequiter.

Both the original speaker and "cambler" are wrong. There is nothing in .com and .net that cause a 48-hour delay in changing location. The .com/.net registries point to *name servers* for each registered name. The person who controls the *name servers* is responsible for timely updates of the name-to-IP tables. That person also sets the length of time that a particular address is supposed to be valid.

This is the way it has been since the DNS was invented.

Yes, that's what I said. Updates to those name servers for .com (the .com zone servers) take 24 hours at present.

If you change anything in your delegation, you wait 24 hours.

If you change anything within your deletation (at your own name servers), then it's all you.

In both cases, you're also backed up against the wall by your TTL - but you can set that low if you anticipate frequent changes.

I'm not as dumb as I look.