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1.
Craigslist term for a phone number composed of numeric digits and spelled-out numbers. Many CL posters/spammers use this technique:

- to avoid autodialers,

- to prevent harvesting / resale of their phone numbers,

- to make it more difficult for flaggers to find their multiple ads by searching on their phone number.

Origin: Supposedly, prostitutes who use CL to advertise in multiple cities or spam / overpost in one location originated the technique.
Hookerized CL post: For a good time, call Jenny: 8 (six) (seven) - 5 (three) 0 (nine). (867-5309)
by TANSTAAFL1 May 03, 2011