# Sumner Jefferson Koch

> Public directory record. License status is unknown; check the original sources before relying on a credential. Office location is not proof of admission.

[Canonical profile](<https://instalawhq.com/lawyers/sumner-jefferson-koch-ca-154139>) | [JSON record](<https://instalawhq.com/api/v1/lawyers/sumner-jefferson-koch-ca-154139>)

- Record ID: ca-154139
- Updated: 2026-10-16T00:46:54.735582+00:00
- Data status: registry\_imported
- License status: unknown
- Claimed profile: No
- Title: Attorney
- Office: Rosemead
- Firm: Not provided
- Practice areas: Not provided
- Languages: Not provided
- Years of experience: Not provided
- Free consultation: Not provided
- Virtual appointments: Not provided
- Accepting inquiries through this site: No
- Reported hourly fee: Not provided
- Rating: Not provided; review count: 0

## About

Sumner Jefferson Koch appears in the California State Bar attorney registry under registration number 154139. The registry reported Active status when observed on 2026-10-08. Reported office city: Rosemead.

## Approach

Not provided

## Education

Not provided

## Registry observations

Source-reported statuses below are observations, not independent confirmation of an active license.

- CA; registration 154139; reported status: Active; observed 2026-10-08T08:07:06.722Z; [source](<https://apps.calbar.ca.gov/attorney/Licensee/Detail/154139>).

## Sources

- [Registry source](<https://apps.calbar.ca.gov/attorney/Licensee/Detail/154139>); observed 2026-10-08T08:07:06.722Z.
- [Registry source](<https://apps.calbar.ca.gov/attorney/Licensee/Detail/154139>); observed 2026-10-08T08:07:06.722Z.

## Contact



No inquiry action is available through this directory. Booking is unavailable. Public API and MCP access are read-only.