Carrier profile · USDOT 106905 · MC-116313 · FMCSA data fetched 2026-10-18

TROMBLY MOTOR COACH SERVICE INC

147 power units185 driversInterstateDRACUT, MA

Census status Active (A)MC-116313 · code A

← Back to overviewAuthority & Insurance · USDOT 106905

Authority & Insurance

Operating authority by docket

Docket	Authority type	Status	BI&PD req. / on file (source value)	Cargo req./on file	Bond req./on file
MC116313	Motor Carrier of Passengers	Active	5,000,000 / 5,000,000	N / N	N / N

Source: Motus Carrier – All With History (inys-ebih) · raw queryDataset updated 2026-10-17 10:03 UTCFetched 2026-10-18 02:09 UTC

Authority status history

FMCSA change date	Docket	Authority type	New status	Reason (source)
1983-07-05	MC116313	Motor Carrier of Passengers	Active	GRANTED

Source: Motus AuthHist – All With History (yu5v-wbh6) · raw queryDataset updated 2026-10-17 10:00 UTCFetched 2026-10-18 02:09 UTC

Status and reason text are shown exactly as FMCSA publishes them. The change date is FMCSA's status_change_date; “Dataset updated” is when FMCSA last published the file, and “Fetched” is when VAX read it. The two authority files are shown side by side and are not reconciled by VAX. Amounts: the dictionary says “thousands”, but published values look like dollars, so raw values are shown. Census status is not authority.

Insurance filings

Insurer	Type	Form	Policy	Max / underlying (source)	Effective
Old Republic Insurance Company	BI&PD · Primary	BMC-91X	MWTB 316653	5,000,000 / 0	2021-12-15

Source: Motus Insur – All With History (c5y8-a4uz) · raw queryDataset updated 2026-10-17 10:01 UTCFetched 2026-10-18 02:09 UTC

Filings as recorded by FMCSA — not a certificate of insurance or proof of current coverage. Amounts are source values (dictionary: thousands).

Source: Motus InsHist – All With History (3uet-3z4i) · raw queryDataset updated 2026-10-17 10:01 UTCFetched 2026-10-18 02:09 UTC

Source: InsHist – legacy (6sqe-dvqs) · raw queryDataset updated 2026-10-17 14:53 UTCFetched 2026-10-18 02:09 UTCFrozen by FMCSA since 2026-05-14

Prior policies

Insurance timeline

Hover a bar for insurer and dates.

Current filings (c5y8-a4uz) — effective date only

Old Republic Insurance Company · 2021-12-15 → end not published

Prior policies (3uet-3z4i + legacy 6sqe-dvqs) — effective → cancellation

NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA · 2020-12-01 → 2022-01-15

NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA · 2020-12-01 → 2021-12-15

AMERICAN ALTERNATIVE INSURANCE CORPORATION · 2017-12-01 → 2020-12-01

HARTFORD CASUALTY INSURANCE COMPANY · 2011-01-24 → 2017-12-01

THE CHARTER OAK FIRE INSURANCE CO. · 2015-12-01 → 2017-12-01

THE CHARTER OAK FIRE INSURANCE CO. · 2013-04-11 → 2015-12-01

HARTFORD CASUALTY INSURANCE COMPANY · 2011-01-24 → 2013-04-11

GRAPHIC ARTS MUTUAL INSURANCE COMPANY · 2005-01-24 → 2011-01-24

UTICA MUTUAL INSURANCE CO. · 2005-01-24 → 2011-01-24

BANKERS STANDARD INSURANCE COMPANY · 2004-01-24 → 2005-01-24

WESTPORT INSURANCE CORPORATION · 2001-01-25 → 2005-01-24

ARCH INSURANCE COMPANY · 2003-01-24 → 2004-01-24

NATIONAL INTERSTATE INSURANCE COMPANY · 2002-01-24 → 2003-03-12

ARCH INSURANCE COMPANY · 2003-01-24 → 2003-01-24

LEGION INSURANCE COMPANY · 2001-01-25 → 2002-01-24

ACADIA INSURANCE COMPANY · 2000-11-01 → 2001-03-14

ACADIA INSURANCE COMPANY · 1998-11-01 → 2000-12-01

ATHENA ASSURANCE COMPANY · 1997-11-01 → 1998-12-16

INDEMNITY INSURANCE CO. OF NORTH AMERICA · 1995-09-15 → 1998-11-01

ATHENA ASSURANCE COMPANY · 1997-11-01 → 1998-11-01

LEXINGTON INSURANCE COMPANY · 1994-04-01 → 1997-11-01

TRAVELERS INDEMNITY COMPANY · 1994-09-15 → 1995-10-31

TRAVELERS INDEMNITY COMPANY · 1994-09-15 → 1995-09-15

UNITED NATIONAL INSURANCE COMPANY · 1994-09-15 → 1995-09-15

LEXINGTON INSURANCE COMPANY · 1994-09-15 → 1995-09-15

20002005201020152020

1994-04-012022-01-15

Bars run only between published effective and cancellation dates. Current filings show their effective date only — no end is assumed and no continuous coverage is inferred. Current history: 3uet-3z4i; legacy rows from 6sqe-dvqs (frozen 2026-05-14) are kept only when not already in the current file.

Insurer	Effective	Cancelled	Method	Policy	Dataset
NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA	2020-12-01	2022-01-15	Cancelled	GPNU-EP-0027086-00	6sqe-dvqs
NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA	2020-12-01	2021-12-15	Replaced	GPNU-EA-0027088-00	6sqe-dvqs
AMERICAN ALTERNATIVE INSURANCE CORPORATION	2017-12-01	2020-12-01	Replaced	GPPA-GX-3150054-00	6sqe-dvqs
AMERICAN ALTERNATIVE INSURANCE CORPORATION	2017-12-01	2020-12-01	Replaced	GPPA-AU-4050066-00	6sqe-dvqs
HARTFORD CASUALTY INSURANCE COMPANY	2011-01-24	2017-12-01	Replaced	13HHUSV8440	6sqe-dvqs
THE CHARTER OAK FIRE INSURANCE CO.	2015-12-01	2017-12-01	Replaced	CAP 5972C279	6sqe-dvqs
THE CHARTER OAK FIRE INSURANCE CO.	2013-04-11	2015-12-01	Replaced	CAP-9A649581	6sqe-dvqs
HARTFORD CASUALTY INSURANCE COMPANY	2011-01-24	2013-04-11	Replaced	13MCPSV8440	6sqe-dvqs
GRAPHIC ARTS MUTUAL INSURANCE COMPANY	2005-01-24	2011-01-24	Replaced	BAC 379 38 88	6sqe-dvqs
UTICA MUTUAL INSURANCE CO.	2005-01-24	2011-01-24	Replaced	CULP 379 38 90	6sqe-dvqs
BANKERS STANDARD INSURANCE COMPANY	2004-01-24	2005-01-24	Replaced	CSA 320428	6sqe-dvqs
WESTPORT INSURANCE CORPORATION	2001-01-25	2005-01-24	Replaced	CAS100122	6sqe-dvqs
ARCH INSURANCE COMPANY	2003-01-24	2004-01-24	Replaced	KSCAB 00 299	6sqe-dvqs
NATIONAL INTERSTATE INSURANCE COMPANY	2002-01-24	2003-03-12	Cancelled	SCAF 201783	6sqe-dvqs
ARCH INSURANCE COMPANY	2003-01-24	2003-01-24	Replaced	KSCAB00231	6sqe-dvqs
LEGION INSURANCE COMPANY	2001-01-25	2002-01-24	Replaced	CA11421315	6sqe-dvqs
ACADIA INSURANCE COMPANY	2000-11-01	2001-03-14	Cancelled	ACB 1301015-10	6sqe-dvqs
ACADIA INSURANCE COMPANY	1998-11-01	2000-12-01	Cancelled	MAA1300151	6sqe-dvqs
ACADIA INSURANCE COMPANY	1998-11-01	2000-12-01	Cancelled	CUA1300153	6sqe-dvqs
ATHENA ASSURANCE COMPANY	1997-11-01	1998-12-16	Cancelled	900BA4337	6sqe-dvqs
INDEMNITY INSURANCE CO. OF NORTH AMERICA	1995-09-15	1998-11-01	Replaced	CSA 224668	6sqe-dvqs
ATHENA ASSURANCE COMPANY	1997-11-01	1998-11-01	Replaced	900BA4337	6sqe-dvqs
LEXINGTON INSURANCE COMPANY	1994-04-01	1997-11-01	Replaced	510-8799	6sqe-dvqs
TRAVELERS INDEMNITY COMPANY	1994-09-15	1995-10-31	Cancelled	CAP 654K7228	6sqe-dvqs
TRAVELERS INDEMNITY COMPANY	1994-09-15	1995-09-15	Replaced	CAP 654K7228	6sqe-dvqs
UNITED NATIONAL INSURANCE COMPANY	1994-09-15	1995-09-15	Cancelled	CU 33315	6sqe-dvqs
LEXINGTON INSURANCE COMPANY	1994-09-15	1995-09-15	Replaced	878-0328	6sqe-dvqs

NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA
Effective
2020-12-01
Cancelled
2022-01-15
Method
Cancelled
Policy
GPNU-EP-0027086-00
Dataset
6sqe-dvqs
NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA
Effective
2020-12-01
Cancelled
2021-12-15
Method
Replaced
Policy
GPNU-EA-0027088-00
Dataset
6sqe-dvqs
AMERICAN ALTERNATIVE INSURANCE CORPORATION
Effective
2017-12-01
Cancelled
2020-12-01
Method
Replaced
Policy
GPPA-GX-3150054-00
Dataset
6sqe-dvqs
AMERICAN ALTERNATIVE INSURANCE CORPORATION
Effective
2017-12-01
Cancelled
2020-12-01
Method
Replaced
Policy
GPPA-AU-4050066-00
Dataset
6sqe-dvqs
HARTFORD CASUALTY INSURANCE COMPANY
Effective
2011-01-24
Cancelled
2017-12-01
Method
Replaced
Policy
13HHUSV8440
Dataset
6sqe-dvqs
THE CHARTER OAK FIRE INSURANCE CO.
Effective
2015-12-01
Cancelled
2017-12-01
Method
Replaced
Policy
CAP 5972C279
Dataset
6sqe-dvqs
THE CHARTER OAK FIRE INSURANCE CO.
Effective
2013-04-11
Cancelled
2015-12-01
Method
Replaced
Policy
CAP-9A649581
Dataset
6sqe-dvqs
HARTFORD CASUALTY INSURANCE COMPANY
Effective
2011-01-24
Cancelled
2013-04-11
Method
Replaced
Policy
13MCPSV8440
Dataset
6sqe-dvqs
GRAPHIC ARTS MUTUAL INSURANCE COMPANY
Effective
2005-01-24
Cancelled
2011-01-24
Method
Replaced
Policy
BAC 379 38 88
Dataset
6sqe-dvqs
UTICA MUTUAL INSURANCE CO.
Effective
2005-01-24
Cancelled
2011-01-24
Method
Replaced
Policy
CULP 379 38 90
Dataset
6sqe-dvqs
BANKERS STANDARD INSURANCE COMPANY
Effective
2004-01-24
Cancelled
2005-01-24
Method
Replaced
Policy
CSA 320428
Dataset
6sqe-dvqs
WESTPORT INSURANCE CORPORATION
Effective
2001-01-25
Cancelled
2005-01-24
Method
Replaced
Policy
CAS100122
Dataset
6sqe-dvqs
ARCH INSURANCE COMPANY
Effective
2003-01-24
Cancelled
2004-01-24
Method
Replaced
Policy
KSCAB 00 299
Dataset
6sqe-dvqs
NATIONAL INTERSTATE INSURANCE COMPANY
Effective
2002-01-24
Cancelled
2003-03-12
Method
Cancelled
Policy
SCAF 201783
Dataset
6sqe-dvqs
ARCH INSURANCE COMPANY
Effective
2003-01-24
Cancelled
2003-01-24
Method
Replaced
Policy
KSCAB00231
Dataset
6sqe-dvqs
LEGION INSURANCE COMPANY
Effective
2001-01-25
Cancelled
2002-01-24
Method
Replaced
Policy
CA11421315
Dataset
6sqe-dvqs
ACADIA INSURANCE COMPANY
Effective
2000-11-01
Cancelled
2001-03-14
Method
Cancelled
Policy
ACB 1301015-10
Dataset
6sqe-dvqs
ACADIA INSURANCE COMPANY
Effective
1998-11-01
Cancelled
2000-12-01
Method
Cancelled
Policy
MAA1300151
Dataset
6sqe-dvqs
ACADIA INSURANCE COMPANY
Effective
1998-11-01
Cancelled
2000-12-01
Method
Cancelled
Policy
CUA1300153
Dataset
6sqe-dvqs
ATHENA ASSURANCE COMPANY
Effective
1997-11-01
Cancelled
1998-12-16
Method
Cancelled
Policy
900BA4337
Dataset
6sqe-dvqs
INDEMNITY INSURANCE CO. OF NORTH AMERICA
Effective
1995-09-15
Cancelled
1998-11-01
Method
Replaced
Policy
CSA 224668
Dataset
6sqe-dvqs
ATHENA ASSURANCE COMPANY
Effective
1997-11-01
Cancelled
1998-11-01
Method
Replaced
Policy
900BA4337
Dataset
6sqe-dvqs
LEXINGTON INSURANCE COMPANY
Effective
1994-04-01
Cancelled
1997-11-01
Method
Replaced
Policy
510-8799
Dataset
6sqe-dvqs
TRAVELERS INDEMNITY COMPANY
Effective
1994-09-15
Cancelled
1995-10-31
Method
Cancelled
Policy
CAP 654K7228
Dataset
6sqe-dvqs
TRAVELERS INDEMNITY COMPANY
Effective
1994-09-15
Cancelled
1995-09-15
Method
Replaced
Policy
CAP 654K7228
Dataset
6sqe-dvqs
UNITED NATIONAL INSURANCE COMPANY
Effective
1994-09-15
Cancelled
1995-09-15
Method
Cancelled
Policy
CU 33315
Dataset
6sqe-dvqs
LEXINGTON INSURANCE COMPANY
Effective
1994-09-15
Cancelled
1995-09-15
Method
Replaced
Policy
878-0328
Dataset
6sqe-dvqs

Federal activity

2025-09-08Census
Official safety rating: S
2025-09-05Census
Latest MCS-150 filing
2025-09-05Census
Compliance review recorded (C)
2022-01-156sqe-dvqs
Prior policy ended (cancelled) — NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA
2021-12-15c5y8-a4uz
Insurance filing effective — Old Republic Insurance Company
2021-12-156sqe-dvqs
Prior policy ended (replaced) — NATIONAL UNION FIRE INS. CO. OF PITSBGH. PA
2020-12-016sqe-dvqs
Prior policy ended (replaced) — AMERICAN ALTERNATIVE INSURANCE CORPORATION
2020-12-016sqe-dvqs
Prior policy ended (replaced) — AMERICAN ALTERNATIVE INSURANCE CORPORATION
2017-12-016sqe-dvqs
Prior policy ended (replaced) — HARTFORD CASUALTY INSURANCE COMPANY
2017-12-016sqe-dvqs
Prior policy ended (replaced) — THE CHARTER OAK FIRE INSURANCE CO.
2015-12-016sqe-dvqs
Prior policy ended (replaced) — THE CHARTER OAK FIRE INSURANCE CO.
2013-04-116sqe-dvqs
Prior policy ended (replaced) — HARTFORD CASUALTY INSURANCE COMPANY
2011-01-246sqe-dvqs
Prior policy ended (replaced) — GRAPHIC ARTS MUTUAL INSURANCE COMPANY
2011-01-246sqe-dvqs
Prior policy ended (replaced) — UTICA MUTUAL INSURANCE CO.
2005-01-246sqe-dvqs
Prior policy ended (replaced) — BANKERS STANDARD INSURANCE COMPANY
2005-01-246sqe-dvqs
Prior policy ended (replaced) — WESTPORT INSURANCE CORPORATION
2004-01-246sqe-dvqs
Prior policy ended (replaced) — ARCH INSURANCE COMPANY
2003-03-126sqe-dvqs
Prior policy ended (cancelled) — NATIONAL INTERSTATE INSURANCE COMPANY
2003-01-246sqe-dvqs
Prior policy ended (replaced) — ARCH INSURANCE COMPANY
2002-01-246sqe-dvqs
Prior policy ended (replaced) — LEGION INSURANCE COMPANY
2001-03-146sqe-dvqs
Prior policy ended (cancelled) — ACADIA INSURANCE COMPANY
2000-12-016sqe-dvqs
Prior policy ended (cancelled) — ACADIA INSURANCE COMPANY
2000-12-016sqe-dvqs
Prior policy ended (cancelled) — ACADIA INSURANCE COMPANY
1998-12-166sqe-dvqs
Prior policy ended (cancelled) — ATHENA ASSURANCE COMPANY
1998-11-016sqe-dvqs
Prior policy ended (replaced) — INDEMNITY INSURANCE CO. OF NORTH AMERICA
1998-11-016sqe-dvqs
Prior policy ended (replaced) — ATHENA ASSURANCE COMPANY
1997-11-016sqe-dvqs
Prior policy ended (replaced) — LEXINGTON INSURANCE COMPANY
1995-10-316sqe-dvqs
Prior policy ended (cancelled) — TRAVELERS INDEMNITY COMPANY
1995-09-156sqe-dvqs
Prior policy ended (replaced) — TRAVELERS INDEMNITY COMPANY
1995-09-156sqe-dvqs
Prior policy ended (cancelled) — UNITED NATIONAL INSURANCE COMPANY
1995-09-156sqe-dvqs
Prior policy ended (replaced) — LEXINGTON INSURANCE COMPANY
1983-07-05yu5v-wbh6
Authority status change: Motor Carrier of Passengers → Active (GRANTED)
1974-06-01Census
Added to FMCSA registration

Built only from dates in the sources above. Authority changes use FMCSA's own change date (yu5v-wbh6).

Changes observed by VAX monitoring

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