Certain prepositions (after, as, before, since, until) serve as subordinating conjunctions when they're followed by a clause: 1  You better get out of town before sundown. (Before is used as a preposition.) 2  Many people run out of ideas long before they run out of words. (Before is used as a conjunction.)
Sponsored Topics. Foster City is an affluent planned city located in San Mateo County, California, 94404. As of the 2010 census, the city had a total population of 30,567. Forbes ranked Foster City #10 on their 2009 list of America's Top 25 Towns to Live Well.
Zip code 94403 is primarily located in San Mateo County. The official postal service name used for 94403 is SAN MATEO, California. Portions of the 94403 zip code are contained within or border the city limits of San Mateo, CA, Belmont, CA, and Foster City, CA. The 94403 area code is 650.