Carrier profile · USDOT 1520308 · Updated Jun 13, 2026

Isc Investment Inc

DBA INDEPENDENT SIGN COMPANY

1 power unitDENVER, CO50/100
AUTHORITY STATUS UNKNOWN
Verified linksqwest.netFMCSA SAFER

Network & Fraud

Reincarnation chains, shared-VIN links, common domains and officers, and owner-group affiliations — the chameleon / double-broker signals that name-and-USDOT lookups miss.

Shares a registration email domain with other carriers

@qwest.net — 397 carriers: USDOT 45269USDOT 53152USDOT 142709USDOT 150852USDOT 155768USDOT 179540USDOT 182167USDOT 218485

Shares a company officer with other carriers

barry johnson — 15 carriers: USDOT 837013USDOT 1411388USDOT 1491727USDOT 1578973USDOT 1705676USDOT 1999201USDOT 2423979USDOT 2489864

Owner / group view· confidence: email domain + officer

Owner / group view

Affiliated authorities

Collapses 411 related authorities · joined by email domain + officer

Authorities
411
Combined power
1,114
States
30
Oldest authority
Jun 1, 1974
Active now
188

Affiliated entities· hover to preview

ENERGY SAFETY SERVICES INCUNAGA EUSTI ENTERPRISES INCGLENWOOD INGLEWOOD WATER CODOUBLE T TRANSPORT INCOMO CONSTRUCTION INCJOHN GRAYCASCADE PACIFIC TRANSPORTATION INCSUMMIT EXPRESS INC