Every new California business filing, every dayMainline HQ
David R Van Til, Registered Agent
Mainline HQ provides done-for-you AI front office automation for trade businesses such as plumbers, electricians, and HVAC contractors. Their services include website chatbots, automated scheduling, review management, and lead capture. The business is based in California and offers a free consultation.
Filed March 23, 2026 · San Diego, CA · San Diego County
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California Secretary of State (bizfile Online) · Entity B20260142387 · Retrieved May 14, 2026
About Mainline HQ
Mainline HQ LLC filed in California on March 23, 2026, as a front office automation service for trades. Owner David R Van Til filed personally as registered agent. The domain was registered 5 days before filing, on March 18, 2026, through Cloudflare. The modern website is online-only. We estimate revenue under $100,000 and 1 to 5 employees. No annual report or EIN on file yet.
- Domain registered 5 days before the California filing.
- Owner David R Van Til filed personally as registered agent.
- Modern website, online-only footprint.
- We estimate revenue under $100,000 and 1 to 5 employees.
- No annual report or EIN on file yet.
- First seen 52 days after filing.
Compiled from the state record, the company's public web presence, and our own research; revenue, employee, and footprint figures are estimates, not verified financials. Updated August 23, 2026.
One of 421 new businesses registered in San Diego in March 2026, and the only ai automation services business registered there that month.
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Filing Details
Verified Business Profile
Contact Information
Verified Website Profile
We matched this business to its website and pulled the domain's registration (WHOIS) record. Domain age is one of the strongest signals that a filing is a truly new business and not a re-filing or paperwork change.
Frequently Asked Questions
When was Mainline HQ registered?
Mainline HQ was registered as LLC on March 23, 2026 in California.
Where is Mainline HQ located?
Mainline HQ is based in San Diego, CA, 92103, in San Diego County.
What type of business is Mainline HQ?
Mainline HQ is classified as a ai automation services business (front office automation for trades).
Does Mainline HQ have an EIN on file?
No EIN was found on file for Mainline HQ at the time of registration.
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