Ricardo Isidro Diaz

Ricardo Isidro Diaz
Real Estate Agent (Broker)
Rancho Cucamonga CA

Broker (CA: 01380372)

16 years experience

REALTOR® 3 Active Listings Serves San Bernardino County, CA
View on Realtor.com

Contact Information

Brokerage
Mainstreet Realtors

Office Website
Office Address
10300 4th St Ste 100
Rancho Cucamonga, CA  91730
(San Bernardino County)
Office Phone
888-964-4070
Office Fax
909-463-0788
Mobile
626-804-1540
Email
rick@mainstreetgroup.com

Service Areas

Rancho Cucamonga: CA San Antonio Heights: CA Upland: CA Fontana: CA Jurupa Valley: CA San Bernardino: CA Rialto: CA San Dimas: CA Glendora: CA La Verne: CA Claremont: CA Bloomington: CA Muscoy: CA Devore Heights: CA Vincent: CA Irwindale: CA Citrus: CA Azusa: CA Baldwin Park: CA Chino: CA Pomona: CA Phillips Ranch: CA City Of Industry: CA Ontario: CA Eastvale: CA Norco: CA Home Gardens: CA Corona: CA Industry: CA Diamond Bar: CA Chino Hills: CA

About Ricardo Diaz

Rick Diaz serves as the Founder and President of Mainstreet Realtors, a firm he established in 2008 after beginning his real estate career in 2000 with his family's business. While pursuing a degree in business at the University of La Verne, Rick honed his skills and knowledge in the industry. Under his leadership, Mainstreet Realtors has expanded to three locations: Huntington Beach, Rancho Cucamonga, and Glendora, enhancing the firm's ability to serve clients effectively.

With two decades of experience as a broker, business owner, and dedicated agent, Rick brings a wealth of expertise to every transaction. His services include:

- Virtual consultations tailored to client needs
- Comprehensive marketing strategies featuring 3D virtual tours, professional videos, and aerial photography
- In-depth understanding of buyer and seller requirements
- Current and thorough knowledge of available properties
- Exceptional negotiation skills
- Specialized insight into financing options to secure the best rates and terms
- A dedicated team of professionals to support all facets of the real estate process
- A streamlined service program for buyers, facilitating quick and easy home previews

Rick is committed to delivering an unparalleled customer experience and is always available to assist clients with their real estate needs. His approach is customized and holistic, leveraging the latest technology to provide extensive options, education, and training for both clients and agents.

In today’s competitive market, Rick emphasizes the importance of having the right resources and technology at your disposal. He invites potential clients to reach out and discover how his team can work diligently on their behalf.

San Bernardino County, CA Real Estate Market Analysis (Single Family Homes)

$649,094
Avg. Listing Price
From Ricardo's portfolio
3.4 / 2.5
Avg. Beds/Baths
Typical property size
1,901 sf
Avg. Square Footage
Interior living space
6251
Active Listings
Current inventory

If you need to reach working real estate agents in San Bernardino County, this list was built for you. Mortgage lenders use it to introduce loan programs directly to producing agents. Title companies use it to win referral relationships before their competitors do. PropTech platforms, recruiters, insurance providers, and continuing education companies all rely on accurate agent data to fill pipelines, book demos, and drive enrollments.

When you buy San Bernardino County real estate agent email list data from Dr. Bill, you are not getting a recycled contact dump. You are getting {{AGENT_COUNT}} actively licensed agents with verified email addresses, plus {{CELL_COUNT}} agents who also have cell phone numbers on file — sourced, cleaned, and ready to work for your campaign from day one.

Why Buy a San Bernardino County Real Estate Agent Email List From Dr Bill

Every record in this list originates from the California Department of Real Estate licensing database, then goes through a multi-step verification process. Emails are added weekly as new licenses are issued, scrubbed monthly to remove invalid addresses, and the entire database is rebuilt from the ground up every six months. That discipline is what backs our 96% deliverability guarantee — a number cheap list vendors cannot touch because they are not doing the maintenance work.

Dr. Bill has been selling real estate contact lists since 2005 and has delivered over 31,000 lists to marketers, lenders, and service providers across the country. That track record exists because the data performs. When your cold-email platform — whether you are using Zap Contact at zapcontact.com or another cold-email tool — pulls a bounce rate under four percent, you protect your sender reputation and your budget at the same time.

How to Use This San Bernardino County Agent List

Email outreach is the fastest activation path. Load the list into Zap Contact or your preferred cold-email platform and launch a sequence the same day. The data also supports direct mail campaigns, ringless voicemail drops, and phone outreach using the included cell numbers. Many buyers also upload the file to LinkedIn for matched-audience advertising, putting display ads in front of the exact agents they are already emailing.

Because each record includes license type, you can segment broker-owners from sales agents and tailor your message accordingly. A recruiting pitch to a broker-owner reads very differently than one sent to an agent looking for a new home. That segmentation capability turns one list into multiple focused campaigns without buying additional data.

Why San Bernardino County, California Agent Data Matters

San Bernardino County spans a wide range of distinct markets — from Ontario and Fontana in the west to Victorville, Apple Valley, and Hesperia in the high desert, to communities like Redlands, Yucaipa, and Big Bear Lake further east. With {{AGENT_COUNT}} licensed agents working across this geography, the county represents a substantial and diverse audience. No other vendor segments this data down to the zip code level within the county, giving you precision that statewide blasts simply cannot deliver.

Local targeting means your message reflects the market the agent actually works in. An agent farming zip codes in Rancho Cucamonga has different priorities than one working Barstow. Reaching the right agents in the right sub-markets is what converts a contact list into real revenue for your business.

Current Property Listings

As of 6/21/2026, Ricardo Diaz has 3 properties for sale in Rancho Cucamonga and surrounding areas.

$579,900

Listed 2026-04-13

16125 Gelato Ct Unit 3
Fontana, CA  92336

Beds: 3.0
Baths: 2.5
Sq Ft: 1,832
Lot: 1,002 sf
Condo Map
View Full Details

$639,900

Listed 2026-01-30

8052 Valle Vista Dr
Rancho Cucamonga, CA  91730

Beds: 3.0
Baths: 3.0
Sq Ft: 1,878
Lot: 1,877 sf
Condo Map
View Full Details

$914,990

Listed 2026-01-27

443 S State St
Los Angeles, CA  90033

Beds: 5.0
Baths: 4.0
Sq Ft: 0
Lot: 6,373 sf
Multi Family Map
View Full Details

Current Property Rentals

Ricardo Diaz currently has no rental properties available in Rancho Cucamonga and surrounding areas. Check back later.