In planning and development documents, such as those from the San Francisco Planning Commission , specific numerical codes like are cited in reference to Planning Code sections. For example, Section 145 governs ground-floor ceiling height requirements for urban mixed-use districts. Global Postal Systems
While not a CAS number (which uses dashes), it may appear in large datasets as an internal tracking ID for biological or chemical samples. 145284 zip
While the US uses 5-digit codes, other countries use longer numeric strings: In planning and development documents, such as those