Enter your zip code to search broadband providers. On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20722. 7 PM PST. Not Acceptable, USPS. Compare speeds, prices, coverage and verified reviews for the best internet service providers in Brentwood, MD: Verizon Fios, Xfinity, and Verizon High Speed Internet. In the most recent US census the population of Brentwood was 3046. ZIP Code: Type: County: Population: Area Code(s) ZIP Code 20722: Standard: Prince Georges: 5,711: 240 / 301 ... Internet Providers in Brentwood, Maryland Enter your zip code to find providers in your neighborhood. Only hotels in 20722 zip code are listed below. View photos, floor plans, amenities, and more. … Ads . Easy online ordering. mi. Home appreciation the last 10 years has been 5.9%. View photos, 3D virtual tours, schools, and listing details of 2 homes for sale in Brentwood, MD. Find MoreCities in Maryland that start with B, Post Office Suburb:BRENTWOOD, MD, 20722-9998,