Carrier profile · USDOT 4289501 · Updated Jun 13, 2026
CAPSTONE MECHANICAL LLC
4 power unitsPORTSMOUTH, NH50/100
AUTHORITY STATUS UNKNOWN
Identity & Federal
The official FMCSA identity — legal name, DBA, addresses, contact, officers, and registration — alongside the daily-captured federal-record activity feed, monitored daily by Vektor.
Location
- Physical address
- 755 BANFIELD RD STE 102, PORTSMOUTH, NH, 03801-6100
- Operation
- Interstate
Contact
- Phone
- (603) 319-8389
- Web domain
- cstonemechanical.com
Registration
- Officers
- Robert O'Connor · Jose Flores
- USDOT / docket
- 4289501
- First registered
- Aug 30, 2024
- Last MCS-150
- Aug 30, 2024
- FMCSA safety rating
- Not rated
- D-U-N-S
- —
Fleet (self-reported · MCS-150)
—CDL drivers
—Annual mileage
MCS-150 filing history· biennial-update cadence
Per-filing MCS-150 history (each biennial update + the fleet/mileage it reported) is being captured from the daily federal feed and will appear here as we capture the full history.
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.