{"carrier":{"dot_number":"1892849","legal_name":"HEYMAN MAILING SERVICE INC","dba_name":"MAILING SERVICES","entity_type":"AUTHORIZED FOR HIRE","operating_status":"AUTHORIZED FOR HIRE","phy_street":"12712 ROCK CREEK MILL RD #3B","phy_city":"ROCKVILLE","phy_state":"MD","phy_zip":"20852-2574","phy_country":"US","phone":"3018814685","mc_number":"MC-711931","mc_number_2":"","mc_number_3":"","carrier_operation":"A","hm_indicator":"N","power_units":1,"total_drivers":1,"total_cdl":1,"mcs150_mileage":36000,"mcs150_mileage_year":"2012","mcs150_date":"20131115 0000","add_date":"20090522","officer_1":"ELIZABETH TRALKA","officer_2":"JOHN THOMAS TRALKA","fleet_size_class":"A","business_type":"","duns_number":"","crash_rate":0,"prior_revoke_flag":"N","prior_revoke_dot":"","cargo_types":"C","source":"census","ingested_at":"2026-05-16 01:48:59","updated_at":"2026-05-16 01:48:59"},"crashes":{"total":0,"fatal":null,"injury":null},"safety_scores":[],"freightproof":{"dot_number":"1892849","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":"1892849"},"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)"}}