Siman 403
Presented here for study, not as a practical ruling. The Shulchan Aruch rules by Sephardi custom, the Rema's glosses by Ashkenazi custom, and the Kitzur follows Ashkenazi custom. For a practical question, ask your rabbi.
א שָׁבַת בְּבִקְעָה וְהִקִּיפוּהָ עַכּוּ"ם בְּשַׁבָּת מְחִצּוֹת לַדִּירָה, אֵינוֹ הוֹלֵךְ בָּהּ אֶלָּא אַלְפַּיִם אַמָּה שֶׁאֵינָהּ כֻּלָּהּ כְּאַרְבַּע אַמּוֹת כֵּיוָן שֶׁלֹּא שָׁבַת בַּאֲוִיר הַמְּחִצּוֹת, וּמְטַלְטֵל בְּכֻלָּהּ עַל יְדֵי זְרִיקָה שֶׁיָּכוֹל לִזְרֹק אֲפִלּוּ חוּץ לְאַלְפַּיִם שֶׁהֲרֵי רְשׁוּת הַיָּחִיד גָּמוּר הִיא כֵּיוָן שֶׁהֻקַּף לַדִּירָה. אֲבָל לְטַלְטֵל מַמָּשׁ חוּץ לְאַרְבַּע אַמּוֹת, אָסוּר אֲפִלּוּ תּוֹךְ אַלְפַּיִם, (בֵּית יוֹסֵף בְּשֵׁם תּוֹסָפוֹת הַגָּהוֹת אֲשֵׁרִי פֶּרֶק מִי שֶׁהוֹצִיאוּהוּ).
1 The Laws Applying to a Group of Fields that Non-Jews Enclosed [on Shabbos], [The following laws apply when a person] spent Shabbos in a group of fields and non-Jews enclosed [the area] on Shabbos with partitions erected for the purpose of habitation One may only carry an object in a public domain that is not completely enclosed by walls, roofs, and partitions up to a distance of four cubits, unless an eruv has been established. It is permitted to [transfer articles] within the entire [enclosure, if the person does so] by throwing [the article], for [the person] may throw an article even beyond the 2000 [cubits comprising his Shabbos limits]. It is considered as if it is surrounded by a wall for the purposes of carrying inside it on Shabbat But to carry something beyond four cubits is prohibited, even within two thousand cubits (Beit Yosef citing Tosafot and Hagahot Ashri, chapter of "Mi She'hutziah").