I'm not sure what the exact percentage is, but someone in another diary said that half of the advertising on his show is sold by local affiliates. There's no place to get a list of all the sponsors as is available for the national advertisers, so I'm calling on everyone to list here any local sponsors you find out about. Listening for a half hour to KOGO AM-600 while in the car here in San Diego, here is what I came up with:

Bay Alarm - Bay Area company that serves much of California

Solar Alliance of America - serves southern California

Geico - yes, the national insurance company

ThermalOn Heating Products - national company

Ray Lucia Financial - local (San Diego County) financial services company, owner is conservative

HP Folio - yes, that HP (Hewlett-Packard)

Aramco Financial - local mortgage company, owner is conservative

Ovation Hair Therapy - based in San Diego County

Good Feet Store - local store

Drew Ford - local car dealer

Cash Call Loans - serves Southern California

Valley View Casino - local Indian casino

BNP Paribas Open - tennis tournament in Southern California

Most of the advertisers are small local ones, but there are some big name national companies such as HP and Geico that don't appear on the national boycott list. Maybe it's the same where you live. Unfortunately, this is Friday, so you won't be able to listen to the show until next week, but hopefully you can add to this list.

From Monday's program:

Superior Water (Waterboy)

Ford - national

Toyota Carlsbad - local car dealer

AAMCO - natioanl

Bill Howell Plumbing - local

Solar Alliance of America

Amberin - to treat hormone imbalance in women!

Lear Capital

D&S Termite and Pest Control - local

Mr. Rooter - national

Constant Contact.com

Toyota (Camry) - national

Arm & Hammer - national

JC Penney - national

Netflix - national

Pactrust Bank

Solar City - local

Crossroads of the West Gun Show - I don't expect much luck here!

Insperity - national

Anchor Funding - local

Appliance Rescue

Biore Skin Care - national

Staples - national

O'Reilly Auto Parts - national

SD Storage - local

Help Wanted San Diego.com - local

Ray Lucia Financial - local

National Residential - local

Garage Door Service Co. - local

Rancho Financial - local

Robert Steinberg - local lawyer

Grasshopper Mowers - national

Care.com - babysitters!

Hillsdale College

Keller-Williams Realty