China is +86
A local writes 138 1234 5678 — the dialer below turns that into what you press.
Chinese mobiles carry no trunk digit: the eleven digits starting with 1 are dialed in full at home and follow +86 unchanged. Fixed lines are the ones with a zero, Beijing is 010 locally but +86 10 from abroad, so strip the zero only for landlines. Dial 00 to call out of the mainland; Hong Kong, Macau and Taiwan use their own country codes.
Mobiles are eleven digits grouped 3-4-4 and always start with 1 (13x to 19x by carrier); fixed lines pair 0-led area codes with 7- or 8-digit numbers.
You dial
011 86 13812345678
011 exits United States · 86 reaches China. From any mobile, +86 13812345678 works worldwide.
Type the number the way a local writes it — the arithmetic is derived from each country's ITU plan.
Plan facts verified against ITU-T E.164 assigned country codes · Telephone numbers in China — Wikipedia. Prose is our own.
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