A total of 1364 'Pacific' steam locomotives were built for the major French railway companies, (including those inherited by the terms of the Armistice in 1918). Some of these were later transferred to other companies or regions.
Est 31.001 to 31.040 series 11s (TP-État type) bought under the auspices of the ministry of public works in 1921–23, then Est 231-001 to 231-040, later 1-231.B.1 to 40
Est 231-051 to 231-073 series 12s ("Chapelon" rebuilds, 2nd type, ex-PO 3500-series) ordered by the PO-Midi in 1934, later: 1-231.C.51 to 73
231 PO 4501–4600 two prototypes in 1907, the rest from 1908–1910, then PO-Midi 231-501 to 231-600, later 4-231 A 501 to 600
231 PO 3501–3589 of 1909–1910, then PO-Midi 231-401 to 231-489, all rebuilt before 1938
231 PO 3591–3640 (ALCO type) of 1921, then 231-591 to 231-640 PO-Midi, later 4-231 D 601 to 650
231 PO 3641–3680 (type TP-État) bought in 1923 under the auspices of the ministry of public works, transferred to the AL (20) and the État (20) before 1934
231 PO 3701–3721 ("Chapelon" 1st type) rebuilding of 3566 in 1929 and of 3501–3520 in 1932, then 231-701 to 231-721 PO-Midi, later 4-231 F 701 to 721
231 PO 3722–3731 ("Chapelon" 2nd type) modification, 1934, of locos of the series 3521–3550, then 231-722 to 231-731 PO-Midi, later 4-231 H 722 to 731
231 PO 3801–3806 and 3821–3829 modification, 1932, of locos of the series 3521–3550, then 231-801 to 231-809 PO-Midi and 231-821 to 231-829 PO-Midi, later 4-231 G 801 to 806 and 4-231 G 821 to 829. (The series 4-231 G became 4-231 J in 1952 when the 231 G of PLM origin arrived on the Région Sud-Ouest)
4-231 F 701 to 717 once became 1-231 C 401 to 417
11 machines 231-591 to 231-640 transferred to the État became 3-231 K 301 to 311