| SIC Codes: | 4311 |
| NAICS Codes: | 491110 |
Companies in this industry operate postal services that deliver letters, parcels, and other packages to residences and businesses. This industry includes the US Postal Service and other government-operated postal services, as well as postal stations and delivery services operated on a contract basis. Companies that operate express delivery services, local delivery and messenger services, and couriers are covered separately.