pre_text: item 2 . properties our principal offices are located in boston , southborough and woburn , massachusetts ; atlanta , georgia ; cary , north carolina ; mexico city , mexico ; and sao paulo , brazil . details of each of these offices are provided below: .
post_text: ( 1 ) the facility in woburn contains a total of 163000 square feet of space . approximately 57100 square feet of space is occupied by our lease administration office and our broadcast division , and we lease the remaining space to unaffiliated tenants . in addition to the principal offices set forth above , we maintain 15 regional area offices in the united states through which we operate our tower leasing and services businesses . we believe that our owned and leased facilities are suitable and adequate to meet our anticipated needs . we have also established an office in delhi , india to pursue business opportunities in india and southeast asia , and we have an international business development group based in london , england . our interests in our communications sites are comprised of a variety of ownership interests , including leases created by long-term ground lease agreements , easements , licenses or rights-of-way granted by government entities . pursuant to the loan agreement for the securitization , the tower sites subject to the securitization are subject to mortgages , deeds of trust and deeds to secure the loan . a typical tower site consists of a compound enclosing the tower site , a tower structure , and one or more equipment shelters that house a variety of transmitting , receiving and switching equipment . there are three principal types of towers : guyed , self- supporting lattice , and monopole . 2022 a guyed tower includes a series of cables attaching separate levels of the tower to anchor foundations in the ground . a guyed tower can reach heights of up to 2000 feet . a guyed tower site for a typical broadcast tower can consist of a tract of land of up to 20 acres . 2022 a lattice tower typically tapers from the bottom up and usually has three or four legs . a lattice tower can reach heights of up to 1000 feet . depending on the height of the tower , a lattice tower site for a wireless communications tower can consist of a tract of land of 10000 square feet for a rural site or less than 2500 square feet for a metropolitan site . 2022 a monopole is a tubular structure that is used primarily to address space constraints or aesthetic concerns . monopoles typically have heights ranging from 50 to 200 feet . a monopole tower site of the kind typically used in metropolitan areas for a wireless communications tower can consist of a tract of land of less than 2500 square feet. .
table: Location Function Size (square feet) Property Interest
table: Boston, MA Corporate Headquarters, US Tower Division Headquarters and American Tower International Headquarters 19,600 Leased
table: Southborough, MA Information Technology Data Center 13,900 Leased
table: Woburn, MA US Tower Division, Lease Administration, Site Leasing Management and Broadcast Division Headquarters 57,800 Owned(1)
table: Atlanta, GA US Tower Division, Accounting Services Headquarters 21,400 Leased
table: Cary, North Carolina US Tower Division, New Site Development, Site Operations and Structural Engineering Services Headquarters 17,500 Leased
table: Mexico City, Mexico Mexico Headquarters 11,000 Leased
table: Sao Paulo, Brazil Brazil Headquarters 5,200 Leased
question: Analyse this data from a financial earnings document. what is the square footage of properties in massachusetts?\\n\\n