The most popular ZIP code on television is coming back.

The CW is developing a contemporary spinoff of Aaron Spelling's seminal 1990s teen soap "Beverly Hills, 90210."

"Veronica Mars" creator Rob Thomas is in talks to pen the project, which has been put on the fast track by the network.

Details about the spinoff -- including which if any of the characters on the original series will make the transition to the new show -- remain sketchy. CW is expected to make a decision whether to order a pilot by the end of the month.

The spinoff is being produced by CBS Paramount Network TV, which absorbed original series producer Spelling TV two years ago.

Sources said "90210" creator Darren Star is not involved.

CAA, which packaged the original "90210," is said to have been the mastermind behind the idea of spinning off the hit series. The spinoff would bring Thomas back to CW, where his acclaimed series "Veronica Mars" ended its three-year run last spring.

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