When Eric receives a message from Callen, we can see that his cel number is (323) 555-1004, and Kensi's number is (323) 555-1012.

Callen: If I ever go off the reservation, you have my permission to take me out.
Sam: Well, how far off? I mean, you've pushed it pretty far, and I haven't killed you yet.
Callen: All the way. You know, go rogue.
Sam: You? Never gonna happen. I've never seen anybody see more sides of the coin than you. If anybody's gonna snap, it's me.
Callen: You? Textbook SEAL. And blood pressure's undetectable. Do you even have a blood pressure? Something gets to you, you take it out on the heavy bag. You're lucky like that. If anybody's gonna snap...
Callen and Sam: (speaking at the same time) Kensi.
Callen: Good luck, Deeks.

Deeks: Did you get the little Hetty note?
Kensi: No. By the way, there's no such thing as a "little Hetty note". There's a "Big Hetty Note". There's a "Holy Moly Hetty Note". There's an "Oh Dear God! Hetty Note".