Zum Services Inc is an active interstate carrier based in San Francisco, CA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 20 | 20 | 0 |
| Buses (16+) | 2,939 | 0 | 0 |
| Total Power Units | 2,959 | ||
Distinct vehicles · 24 mo
vs 2,959 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 64% | 93% | Around peer average |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 50% | 82% | Around peer average |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 116 | — | 22.26% |
| Hazmat | 0 | 0 | — | 4.44% |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Apr 1, 2026 | 0 | 0 | 1 | 1 |
| Jan 1, 2026 | 0 | 7 | 6 | 10 |
| Oct 1, 2025 | 0 | 10 | 8 | 8 |
| Jul 1, 2025 | 0 | 3 | 5 | 6 |
| Apr 1, 2025 | 0 | 10 | 8 | 9 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 349 | 78 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 20, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Mar 20, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Mar 20, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Mar 20, 2026 | CA | BUS | 0 | 0 |
| Mar 20, 2026 | CA | SCHOOL BUS |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 4 | 0.01 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 290 | 0.42 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
Where they run
Inspected in 6 states. Top state CA accounts for 93% of activity. Activity outside home state (CA): 7%.
+1 other state with fewer inspections
| Jan 1, 2025 |
| 0 |
| 6 |
| 9 |
| 10 |
| Oct 1, 2024 | 0 | 1 | 3 | 4 |
| Jul 1, 2024 | 0 | 3 | 3 | 4 |
| 130 |
| Unsafe Driving | 5 | 0 | 0 |
| 0 |
| 0 |
| Mar 20, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Mar 20, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Mar 19, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Mar 19, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Mar 19, 2026 | CA | SCHOOL BUS | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 18, 2026 | 39383CELGPB | Exhaust System - Gasoline-Powered Buses - Any gasoline-powered bus exhaust system that is leaking or discharging under the chassis more than 6 inches (15.24 cm) f | Vehicle Maintenance | Yes |
| Mar 13, 2026 | 39381H | Horn - Inoperative or defective | Vehicle Maintenance | — |
| Mar 12, 2026 | 3939ALHLI | Lighting - Headlamp(s) - Any inoperative | Vehicle Maintenance | — |
| Mar 12, 2026 | 3939ALFTSI | Lighting - Front - Turn signal - inoperative | Vehicle Maintenance | — |
| Mar 10, 2026 | 3939ALFTSI | Lighting - Front - Turn signal - inoperative | Vehicle Maintenance | — |
| Mar 6, 2026 | 393201DFR | Frame - Accessories improperly attached | Vehicle Maintenance | — |
| Mar 6, 2026 | 39375A1TFBMF | Tires - Front belt material/casing ply showing in tread area | Vehicle Maintenance | Yes |
| Mar 6, 2026 | 39375A1TFBMF | Tires - Front belt material/casing ply showing in tread area | Vehicle Maintenance | — |
| Feb 13, 2026 | 393201DFR | Frame - Accessories improperly attached | Vehicle Maintenance | — |
| Feb 6, 2026 | 3965BL | Lubrication - Oil or grease leak | Vehicle Maintenance | — |