{"carrier":{"dot_number":"3248730","legal_name":"SIGMA MECHANICAL SERVICES LLC","dba_name":"","entity_type":"PRIVATE PROPERTY","operating_status":"PRIVATE PROPERTY","phy_street":"25 ROCKWOOD RD","phy_city":"MARSHFIELD","phy_state":"MA","phy_zip":"02050","phy_country":"US","phone":"7818379994","mc_number":"FF-31144","mc_number_2":"","mc_number_3":"","carrier_operation":"C","hm_indicator":"N","power_units":4,"total_drivers":4,"total_cdl":0,"mcs150_mileage":1,"mcs150_mileage_year":"2018","mcs150_date":"20210917 1427","add_date":"20190221","officer_1":"DAVID WESLEY TUCKER","officer_2":"","fleet_size_class":"C","business_type":"","duns_number":"170541093","crash_rate":0,"prior_revoke_flag":"","prior_revoke_dot":"","cargo_types":"C","source":"census","ingested_at":"2026-05-16 01:58:41","updated_at":"2026-05-16 01:58:41"},"crashes":{"total":0,"fatal":null,"injury":null},"safety_scores":[],"freightproof":{"dot_number":"3248730","record_status":"no_vetting_yet","what_this_proves":"FMCSA-sourced carrier data cached by FreightProof. No signed vetting record exists yet; run one to generate a tamper-evident proof-of-checking.","data_hash":null,"vetting_date":null,"verify":null,"run_full_vetting":{"endpoint":"https://freight.rootz.global/mcp","tool":"freight_carrier_vet","arguments":{"dot_number":"3248730"},"sealed_evidence_tool":"freight_create_evidence"},"ai_discovery":"https://freight.rootz.global/.well-known/ai","data_source":"FMCSA (Census, Crash, Inspection, Enforcement)","legal_basis":"Montgomery v. Caribe Transport II, LLC, 608 U.S. ___ (2026)"}}