"Berkshire Hathaway's Hilton code N0437015 is a holding company code. Berkshire Hathaway itself has very few direct employees (fewer than 30 at HQ) — most employees work for subsidiaries (Geico, BNSF, etc.) that have their own corporate codes. No FlyerTalk thread documents BRK Hilton verification incidents. The holding company code is rarely used since most Berkshire subsidiaries maintain separate travel programs. Minimal enforcement expected."

"JC Penney's Hilton code N0381437 is a retail corporate code. Hilton's general corporate verification rate of ~20% applies primarily to full-service urban properties. JC Penney's suburban mall-anchor presence means most JCP-related hotel stays are at select-service properties (Hampton, Hilton Garden Inn) where enforcement is minimal. JC Penney's workforce reduction following bankruptcy further reduces the volume of legitimate JCP code users."

"Ford (alt) Hilton code N0900266 appears to be a secondary Ford Motor Company code. Ford's primary Hilton code is rated Low — no documented verification incidents outside Detroit-area properties. Ford has major HQ in Dearborn MI; Hilton properties in that market are familiar with Ford employees but the general US-wide enforcement rate is very low (~10-20% Hilton average). Secondary codes circulate less widely and face even less scrutiny than primary corporate codes."