Asset-based
35 power units. Brokers price each fleet type apart.
Load decision · FMCSA snapshot · 2026-06-13
Active authority and a clean federal record. No blocking issues found.
Asset-based
35 power units. Brokers price each fleet type apart.
11.5 yr
Model years 2004–2026 · peer benchmark computing.
21 yr unchanged
Same registration since 2004 — no chameleon / reincarnation signal.
Is SHAMROCK VACUUM SERVICE INC safe to load? SHAMROCK VACUUM SERVICE INC (USDOT 1285243, MC-579917) is an active asset-based motor carrier based in LIBERTY, TX, operating 35 power units and 23 drivers. Operating authority has been active 21 years (past the 24-month broker-confidence threshold). Across 19 roadside inspections, its vehicle out-of-service rate over the last 24 months is 7.1% (below the 22.26% national average), with 3 reportable crashes in the last 24 months. FMCSA rates it Satisfactory. Vektor rates it clear to load (94/100). Source: FMCSA SAFER/MCMIS, last updated 2026-06-13.
SHAMROCK VACUUM SERVICE INC's USDOT number is 1285243, and its motor carrier number is MC-579917.
As of 2026-06-13, SHAMROCK VACUUM SERVICE INC is active in the FMCSA register with common, contract, broker operating authority on file.
SHAMROCK VACUUM SERVICE INC has a 7.1% vehicle out-of-service rate (national average 22.26%) across 19 roadside inspections, with 3 reportable crashes in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 94/100 (tier: clear).
SHAMROCK VACUUM SERVICE INC operates 35 power units and 23 drivers per its most recent MCS-150 filing.
SHAMROCK VACUUM SERVICE INC is based in LIBERTY, TX, with roadside inspections recorded across 2 states.
Comparable carriers around Liberty and across Texas
19 inspections · 24 mo · vs national benchmarks
Out-of-service rate· trailing 24 months vs national benchmark
OOS trajectory· trailing 6-mo vehicle-OOS rate vs national
Inspection coverage· expected vs observed · the fraud signal
How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.
Violation themes· decoded · grouped by BASIC
What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.
Can they legally + adequately haul your load?
Operating authority· 49 CFR · per type
Operating authority
Insurance & bonds
Insurance continuity· insurer · policy · lapses
No BIPD policy is currently in force in the filing history. The authority record may still list one on file — request a COI to confirm current coverage.
| Insurer | Period | Limit | Renewals |
|---|---|---|---|
| GREAT DIVIDE INSURANCE COMPANY | Feb 2025 → Feb 2026 | $750k | 1 |
| GOLDEN BEAR INSURANCE COMPANY | Jan 2025 → Feb 2026 | $750k | 1 |
| GUIDEONE NATIONAL INSURANCE COMPANY | Feb 2024 → Feb 2024 | $750k | 2 |
| KEY RISK INSURANCE COMPANY | Feb 2024 → Feb 2025 | $750k | 1 |
| GUIDEONE NATIONAL INSURANCE COMPANY | Feb 2023 → Feb 2024 | $750k | 1 |
| KEY RISK INSURANCE COMPANY | Feb 2023 → Feb 2024 | $750k | 1 |
| GUIDEONE NATIONAL INSURANCE COMPANY | Feb 2023 → Mar 2024 | $750k | 1 |
| KEY RISK INSURANCE COMPANY | Feb 2022 → Feb 2023 | $750k | 1 |
| GUIDEONE NATIONAL INSURANCE COMPANY | Feb 2022 → Feb 2023 | $750k | 1 |
| KEY RISK INSURANCE COMPANY | Feb 2021 → Feb 2022 | $750k | 1 |
| KEY RISK INSURANCE COMPANY | Feb 2020 → Feb 2020 | $750k | 2 |
| GUIDEONE MUTUAL INSURANCE COMPANY | Feb 2019 → Feb 2022 | $750k | 1 |
| GREAT DIVIDE INSURANCE COMPANY | Feb 2018 → Feb 2020 | $750k | 1 |
| GUIDEONE MUTUAL INSURANCE COMPANY | Feb 2018 → Feb 2019 | $750k | 1 |
| HDI GLOBAL INSURANCE COMPANY | Feb 2017 → Feb 2018 | $750k | 2 |
| HDI-GERLING AMERICAN INSURANCE COMPANY | Feb 2016 → Apr 2016 | $750k | 4 |
| HDI GLOBAL INSURANCE COMPANY | Feb 2016 → Feb 2017 | $750k | 1 |
| HDI-GERLING AMERICAN INSURANCE COMPANY | Feb 2014 → Feb 2016 | $750k | 5 |
| NATIONAL LIABILITY & FIRE INS CO. | Feb 2013 → Feb 2014 | $750k | 1 |
| UNITED STATES FIRE INSURANCE CO. | Feb 2010 → Feb 2013 | $750k | 3 |
| ILLINOIS NATIONAL INSURANCE CO. | Feb 2006 → Feb 2010 | $750k | 1 |
VIN-decoded · NHTSA vPIC
Capacity· power units = haulable capacity; trailers are towed
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Revealed by inspection density across 2 states · 24 mo
Operating footprint· revealed by roadside-inspection geography
Inspection density by state· each tile = a state · shade = inspections, last 24 mo
Affiliated entities & reincarnation signals · for review, not a verdict
Last 12 months: 1 truck also ran under 1 other carrier
Shares a registration email domain with other carriers
Capacity consistency· registered vs roadside-observed power units
Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.
FMCSA census + L&I dossier
Location
Contact
Registration
Fleet (self-reported · MCS-150)
Daily-captured FMCSA licensing & insurance changes — monitored by Vektor
Federal record activity· monitored daily by Vektor
No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.
Verified broker, shipper & driver reviews — moderated
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