Conversation so far:
who did Snoop Dogg sign with?
Snoop signed with Master P's No Limit Records.
how old was he when he got his start?
CANNOTANSWER.
where was he living at that time?
CANNOTANSWER.
where else was he successful?
In 2004, Snoop signed to Geffen Records/Star Trak Entertainment both of which were distributed through Interscope Records.

Question: what happened after he signed with  Geffen Records?
Self-contained rewrite: What happened after Snoop Dogg signed with  Geffen Records?