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Exhibit 21
 SUBSIDIARIES OF THE COMPANY
 Corporations
    
    State of OrganizationAmerican Spectrum Realty Management, Inc.
    
    DelawareAmerican Spectrum Realty Properties, Inc.
    
    MarylandLimited PartnershipsAmerican Spectrum Holdings-Hazelwood, L.P.
    
    MissouriAmerican Spectrum Realty Operating Partnership, L.P.
    
    DelawareASR Park Ten 350, L.P.
    
    TexasASR Park Ten 360, L.P.
    
    TexasASR 800 Sam Houston, L.P.
    
    DelawareASR 2401 Fountainview, L.P
    
    DelawareASR 5450 NW, L.P.
    
    DelawareASR 5850 San Felipe, L.P.
    
    DelawareASR 6677 Gessner, L.P.
    
    DelawareASR 11500 NW, L.P.
    
    DelawareASR Sam Houston, L.P.
    
    TexasASR Washington, L.P.
    
    TexasASR Westheimer, L.P.
    
    TexasASR-8 Centre, L.P.
    
    DelawareASR-1501 Mockingbird, L.P.
    
    DelawareASR-2855 Mangum, L.P.
    
    DelawareASR-6420 Richmond Atrium, L.P.
    
    DelawareASR-6430 Richmond Atrium, L.P.
    
    DelawareASR-Beltway Industrial, L.P.
    
    DelawareASR-Gray Falls, L.P.
    
    DelawareASR-Market Columbia, L.P.
    
    DelawareASR-Parkway One & Two, L.P.
    
    DelawareASR-West Gray, L.P.
    
    DelawareASR-Windrose, L.P.
    
    DelawareLindbergh Boulevard Partners
    
    MissouriMarket Columbia, L.P.
    
    CaliforniaNooney Rider Trail, L.P.
    
    DelawarePasadena Autumn Ridge, L.P.
    
    TexasSierra Pacific Development Fund II, L.P.
    
    DelawareLimited Liability CompaniesAmerican Spectrum Holdings (Lindbergh). LLC
    
    DelawareAmerican Spectrum Holdings (Pasadena), LLC
    
    DelawareAmerican Spectrum Holdings (SPIP-V), LLC
    
    DelawareAmerican Spectrum Holdings (Washington), LLC
    
    DelawareAmerican Spectrum Holdings (Westheimer), LLC
    
    DelawareAmerican Spectrum Realty-1501 Mockingbird, LLC
    
    DelawareAmerican Spectrum Realty-2855 Mangum, LLC
    
    DelawareAmerican Spectrum Realty-Gray Falls, LLC
    
    DelawareAmerican Spectrum Realty-6420 Richmond Atrium, LLC
    
    DelawareAmerican Spectrum Realty-6430 Richmond Atrium, LLC
    
    DelawareASR 800 Sam Houston, LLC
    
    DelawareASR 2401 Fountainview, LLC
    
    DelawareASR 5450, LLC
    
    DelawareASR 5850 San Felipe, LLC
    
    DelawareASR 6677 Gessner, LLC
    
    Delaware




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SUBSIDIARIES OF THE COMPANY (continued)ASR 11500 NW, LLC
    
    DelawareASR NRT, LLC
    
    DelawareAmerican Spectrum Realty-8 Centre, LLC
    
    DelawareAmerican Spectrum Realty-1501 Mockingbird, LLC
    
    DelawareAmerican Spectrum Realty-6420 Richmond, LLC
    
    DelawareAmerican Spectrum Realty-6430 Richmond, LLC
    
    DelawareAmerican Spectrum Realty-Beltway Industrial, LLC
    
    DelawareAmerican Spectrum Realty-Windrose, LLC
    
    DelawareASR-Market Columbia, LLC
    
    DelawareASR-Parkway One and Two, LLC
    
    DelawareASR-West Gray, LLC
    
    DelawareBack Bay, LLC
    
    DelawareCountryside Exec Center, LLC
    
    DelawareLeawood, LLC
    
    DelawareLeawood KS, LLC
    
    DelawareMarket Columbia, LLC
    
    DelawareMcDonnell Associates, LLC
    
    DelawareNooney Income Fund II, LLC
    
    DelawareNooney Income Fund, LLC
    
    DelawareNooney Real Property Investors Two, LLC
    
    DelawareNooney Rider Trail, LLC
    
    DelawareNorthcreek, LLC
    
    DelawareOakgrove Commons, LLC
    
    DelawarePacific Spectrum, LLC
    
    ArizonaPlaza Center, LLC
    
    DelawareSeventy Seven, LLC
    
    DelawareSierra Creekside, LLC
    
    DelawareSierra Pacific Development Fund II, LLC
    
    DelawareSierra Pacific Development Fund III, LLC
    
    DelawareSierra Pacific Development Fund, LLC
    
    DelawareSierra Pacific Pension Investors 84, LLC
    
    DelawareSierra Southwest Pointe LLC
    
    DelawareThird Coast, LLC
    
    DelawarePartnershipsSierra Creekside Partners
    
    CaliforniaSierra Mira Mesa Partners
    
    CaliforniaSorrento I Partners
    
    CaliforniaSorrento II Partners
    
    California