[quote=AN][quote=SDEngineer]
Actually, RB is part of San Diego City. It’s about the furthest flung part though.
[/quote]
Thanks for correcting me. I always though RB belong to Poway city. But it seems like 4S is not part of San Diego City.[/quote]

4S is part of San Diego City as well. You cross out of San Diego city limits when you cross the I-15 bridge north over Lake Hodges, or east into Poway. Pretty much everything to the south and west of the I-15 (as well as some stuff to the east of the I-15) until you hit the 94 is San Diego City, except La Jolla, Del Mar, and Rancho Santa Fe.