In 1922, the Deutsche Reichsbahn began to develop a renumbering plan to standardize the numbering of steam locomotives that had been taken over from the state railways (Länderbahnen). Its basis was the corresponding DRG classification system.

The first renumbering plan in 1922 envisaged more class numbers than the later plans. The development of this scheme was discontinued because it was seen that there would be problems in practically adopting it.

The second, provisional, renumbering plan of 25 July 1923 was very like the final version of 1925 in its basic structure. It incorporated space for the new standard locomotives (Einheitslokomotiven) that were planned. The third and final renumbering plan of 1925 differed from its predecessor primarily in that all the locomotives retired up to that point—in some cases entire classes—were deleted; in addition, several mistakes in the numbering were corrected.

With the exception of Bavarian classes, new locomotives built after 1923 were delivered from the outset with their new operating numbers. The actual renumbering of older engines did not begin until 1926.

Locomotives that were seen as obsolete and which would therefore soon be retired were given serial numbers from 7001 after their class number.

Express train locomotives

Original operating numbers 1923 - 2nd renumbering plan Final operating numbers 1925 renumbering plan State railway classRemarks 12 7001 - 7004 Prussian S 1 13 002 - 007 13 001 Prussian S 3 Rebuild of a S 2 to a compound locomotive 13 008 - 457 13 002 - 028 13 501 - 544 13 501 - 504 Prussian S 4 13 601 -647*, 651 - 904 13 651 - 850 Prussian S 5.2 * Wrongly thought to be S 5.1s and so grouped into their own number range 13 1001 - 1442 13 1001 - 1286 Prussian S 6 13 1501 - 1512 13 1501 - 1511 Saxon VIII V1 Built 1900 13 1601 - 1697 13 1601 - 1624 Württemberg AD 13 1701 - 1714 13 1701 - 1714 Württemberg ADh 13 1801 - 1806 13 1801 - 1806 Oldenburg S 3 13 1851 - 1861 13 1851 - 1861 Oldenburg S 5.2 13 7001 - 7020 13 7001 - 7012 Saxon VIII 2 13 7101 - 7120 13 7101 - 7112 Saxon VIII V1 Built 1896/97 14 001, 002 14 001, 002 Prussian S 8 Rebuild of S 9 into superheated steam version 14 031 - 081 14 031 Prussian S 9 14 101 - 112 14 101 - 105 Palatine P 3.I 14 121 Palatine P 3.II 14 131, 132 Bavarian S 2/5 (Baldwin) Vauclain compounds 14 141 - 150 14 141 - 145 Bavarian S 2/5 14 151 - 161 14 141 - 145 Palatine P 4 14 201 - 215 14 201 - 215 Saxon X V 14 301 - 318 14 301 - 317 Saxon X H1 14 401 - 403, 451 - 454 Baden II d 15 001 15 001 Bavarian S 2/6 16 001 - 003 16 001 - 003 Oldenburg S 10 17 001 - 127 17 001 - 135 Prussian S 10 17 201 - 292 17 201 - 296 Prussian S 10.2 17 301 - 326 17 301 - 322 Bavarian C V 17 401 - 420 17 401 - 420 Bavarian S 3/5N 17 501 - 524 17 501 - 524 Bavarian S 3/5H 17 601 - 606 17 601 - 606 Saxon XII H 17 701 - 734, 751 - 755 17 701 - 734, 751 - 755 Saxon XII HV 17 801 - 804 17 801 - 804 Saxon XII H1 17 1001 - 1208 17 1001 - 1209 Prussian S 10.1 1911 and 1914 versions 18 001 - 010 18 001 - 010 Saxon XVIII H 18 101 - 137 18 101 - 137 Württemberg C 18 201...258 18 201...256 Baden IV f Not all numbers were utilised 18 301 - 303, 311 - 319, 321 - 328 18 301 - 303, 311 - 319, 321 - 328 Baden IV h 18 401 - 447, 451 - 463, 471 - 480 18 401 - 434, 441 - 458, 461 - 508 Bavarian S 3/6, Palatine S 3/6 18 509 - 548 were follow-on orders by the DRG 19 001 - 023 19 001 - 023 Saxon XX HV

Passenger train locomotives

Original operating numbers 1923 - 2nd renumbering plan Final operating numbers 1925 renumbering plan State railway class Remarks 33 7001 - 7007 Oldenburg P 3.2 34 7001 - 7012 Prussian P 3.1 34 7101 - 7134 Prussian P 3.2 34 7201 - 7204 Mecklenburg P 2 34 7301 - 7318, 7354 - 7366, 7370 - 7377 34 7301 - 7308, 7351 - 7364 Mecklenburg P 3.1 34 7351 - 7353 Mecklenburg P 3.2 Ex Prussian P 3.2, transferred in 1920 to Mecklenburg 34 7401, 7402 Palatine P 1.I 34 7411 - 7415 Palatine P 1.III 34 7421 - 7440 Bavarian B IX 34 7451 Palatine P 1.II 34 7461, 7462 Bavarian B VI 34 7501 - 7513 Bavarian B X 34 7601 - 7604, 7611 - 7633 34 7611 Saxon III 34 7701 - 7882 34 7701, 7702, 7721 - 7807 Saxon IIIb 34 7901 - 7918 34 7901, 7902 Saxon IIIb V 34 8001 - 8003 Saxon VI 34 8011 - 8023 34 8011 Saxon VIb V 34 8101 - 8123 34 8101, 8102 Württemberg A 34 8131 - 8134 Württemberg Ab 34 8201 - 8231 34 8201 - 8209 Württemberg Ac 35 7001 - 7020 Palatine P 2.I 36 001 - 002 36 001 Prussian P 4.2 Rebuild of P 4.1, Erfurt version, to compound working 36 003 - 540 36 002 - 438 Standard version 36 601 - 626, 651 - 662 36 601 - 620, 651 - 662 Mecklenburg P 4.2 36 701 - 731 36 701 - 708 Bavarian B XI Zw Two-cylinder locomotive 36 751 - 850 36 751 - 826 Bavarian B XI Vb Compound locomotive 36 861 Bavarian P 2/4 Not included in the second renumbering plan 36 901 - 919, 921 - 1018 36 901 - 919, 921 - 948, 951 - 1014 Saxon VIII V2 36 1101-1106 Baden II c Built 1900 36 1201 - 1219 36 1201 - 1219 Oldenburg P 4.1 36 1251 - 1258 36 1251 - 1258 Oldenburg P 4.2 36 7001, 7002 Prussian P 4.1 Erfurt version 36 7003 - 7168 36 7001 - 7009 Standard version (so-called Hannover version) 36 7201, 7202 Mecklenburg P 4.1 Ex Prussian P 4.1, transferred in 1920 to Mecklenburg 36 7301 - 7303, 7311 - 7314, 7321 - 7323 Baden II a 36 7331 - 7335 Baden II b 36 7351, 7361 - 7371, 7381, 7382 Baden II c Built 1892 - 1897 37 001 - 151 37 001 - 163 Prussian P 6 38 001 - 013 38 001 - 013 Bavarian P 3/5 N 38 101 - 108 Württemberg D 38 201 - 324 38 201 - 324 Saxon XII H2 38 325 - 334 were follow-on orders by the DRG 38 401 - 480 38 401 - 480 Bavarian P 3/5 H 38 1001 - 3825, 3951 - 4051 38 1001 - 3832, 3951 - 4051 Prussian P 8, Mecklenburg P 8, Oldenburg P 8, Baden P 8 38 7001...7080 38 7001...7073 Baden IV e Not all numbers were utilised 39 001 - 209 39 001 - 230 Prussian P 10 39 231 - 260 were follow-on orders by the DRG

Goods train locomotives

Original operating numbers 1923 - 2nd renumbering plan Final operating numbers 1925 renumbering plan State railway class Remarks 51 7001 - 7019 Oldenburg G 1 52 7001 - 7006 52 7001 Saxon IIIb 52 7101 Württemberg B 3 53 001 - 297 53 001 - 025 Prussian G 4.2 53 301 - 337 53 301 - 327 Prussian G 4.3 53 401 - 405, 451 Mecklenburg G 4.2 53 501 - 504 Palatine G 3/3 53 601 - 740, 751 53 601 - 729, 751 Saxon V V 53 751 was a follow-on order with a different boiler 53 801-898 53 801 - 865 Württemberg Fc 53 901-926 Baden VII d Built 1901/02 53 1001 - 1011, 1051–1058 53 1001 - 1011, 1051–1058 Oldenburg G 4.2 53 7001 - 7522 53 7001 - 7157 Prussian G 3 53 7601 - 7692 53 7601 - 7617 Prussian G 4.1 53 7701 - 7705 Mecklenburg G 3 53 7801 - 7821 Palatine G 2.I 53 7831 - 7833 Bavarian C III Sigl version 53 7834 - 7868 Ex Bavarian Ostbahn 53 7871 - 7990 53 7991 - 8009 Palatine G 2.II 53 8011 - 8080 53 8011 - 8076 Bavarian C IV Zw Two-cylinder locomotive 53 8081 - 8170 53 8081 - 8168 Bavarian C IV Vb Compound locomotive 53 8201 - 8294 53 8201 - 8211 Saxon V 53 8301 - 8387 53 8301 Württemberg F 2 53 8401-8411 Württemberg F 1 53 8451, 8452 Württemberg F 1c 53 8501 - 8596 53 8501...8586 Baden VII a Last number range was not fully utilised 53 8597 - 8599 53 8587, 8597, 8598 Baden VII c 53 8601 - 8665 Baden VII d Built 1893 - 1899 54 001 - 193 54 001 - 071 Prussian G 5.1 54 201 - 517 54 201 - 386 Prussian G 5.2 53 368 - 386 and other ex-Alsace-Lorraine G 5.2 54 601 - 708 54 601 - 671 Prussian G 5.3 54 801 - 1156 54 801 - 1092 Prussian G 5.4 54 1201 - 1204 54 1201 - 1203 Mecklenburg G 5.4 54 1301 - 1359 54 1301 - 1364 Bavarian C VI 54 1401 - 1427 54 1401 - 1432 Bavarian G 3/4 N 54 1501 - 1725 54 1501 - 1725 Bavarian G 3/4 H 55 001 - 680 55 001 - 660 Prussian G 7.1 55 701 - 1533 55 701 - 1392 Prussian G 7.2 55 1601 - 2266 55 1601 - 2256 Prussian G 8 55 2301 - 2432 55 2301 - 2433 Prussian G 9 55 2501 - 5667 55 2501 - 3366, 3367 - 5622 Prussian G 8.1 55 5701 - 5705 55 5701 - 5705 Mecklenburg G 7.2 55 5801 - 5810, 5851 - 5852 55 5801 - 5810, 5851 - 5852 Mecklenburg G 8.1 55 5901 - 5922 55 5901 - 5922 Palatine G 5 55 6001 - 6023 55 6001 - 6013 Saxon I V 55 6101 - 6119 Baden VIII c 55 6201 - 6213 55 6201 - 6213 Oldenburg G 7 55 7001-7006 Palatine G 3 55 7101, 7102 Bavarian BB I Palatine G 4.II 55 7201 - 7215 55 7201 - 7215 Palatine G 4.I 56 001 - 005 56 001 - 005 Prussian G 7.3 56 101 - 185 56 101 - 185 Prussian G 8.3 56 201 - 205 56 201 - 205 Mecklenburg G 7.3 56 301 - 353 Bavarian E I 56 401 - 404 56 401 - 404 Bavarian G 4/5 N 56 501 - 516 56 501 - 516 Saxon IX V 56 601 - 625 56 601 - 625 Saxon IX HV 56 701...785 56 701...785 Baden VIII e Not all numbers were utilised 56 801 - 809, 901 - 1034, 1101–1125 56 801 - 809, 901 - 1035, 1101–1125 Bavarian G 4/5 H 56 2001 - 2485 56 2001 - 2485, 2551 - 2905 Prussian G 8.2, Oldenburg G 8.2 56 2906 - 2916 were follow-on orders by the DRG 57 001 - 014, 021 - 083 57 001 - 014, 021 - 083 Saxon XI V 57 101 - 105 57 101 - 105 Saxon XI H 57 201 - 218 57 201 - 218 Saxon XI HV 57 301 - 304 57 301 - 304 Württemberg H 57 401 - 417 57 401 - 417 Württemberg Hh 57 501 - 508, 511 - 590 57 501 - 507, 511 - 590 Bavarian G 5/5 57 1001 - 1394, 1396 - 2740, 2892 - 3100 57 1001 - 2726, 2892 - 3524 Prussian G 10 58 001 - 015 58 001 - 015 Prussian G 12.1 58 101 - 114 58 101 - 114 Saxon XIII H Built 1917, like the Prussian G 12.1 58 201...318 58 201...318 Baden G 12 Not all numbers were utilised 58 401 - 462 58 401 - 462 Saxon XIII H Built 1919 - 1924, wie Prussian G 12 58 501 - 543 58 501 - 543 Württemberg G 12 58 1001 58 1001 Prussian G 12 Built for the CFOA (Turkey), taken over by Prussia 58 1002 - 2143 58 1002 - 2143 59 001 - 034 59 001 - 044 Württemberg K

Passenger train tank locomotives

Original operating numbers 1923 - 2nd renumbering plan Final operating numbers 1925 renumbering plan State railway class Remarks 69 7001 - 7003* Prussian T 4.2 * 69 7001, 7002 wrongly classed as T 4 of the 2nd Berlin variant 70 001 - 097 70 001 - 097 Bavarian Pt 2/3 70 101 - 105, 111 - 125 70 101 - 105, 111 - 125 Baden I g 70 126 - 133 were follow-on orders by the DRG 70 7001 Prussian T 4 1. Magdeburg variant 70 7002 - 7004, 7015 - 7016 2nd Berlin variant 70 7005 - 7014, 7017 - 7033, 7036 - 7038 Prussian T 4.1 70 7034, 7035 Prussian T 4.3 70 7101 - 7155 70 7101 - 7154 Bavarian D IX 71 001 - 116* 71 001 - 026 Prussian T 5.1 * 71 019, 020, 029 - 031 wrongly classed T 5.2 71 201 - 212 71 201 - 212 Bavarian Pt 2/4 H 71 301 - 391 71 301 - 385 Saxon IV T 71 401 - 420 71 401 - 420 Oldenburg T 5.1 71 7001 - 7005 Baden IV d 72 001 - 016* 72 001, 002 Prussian T 5.2 * 72 016 wrongly classed T 5.1 72 101, 102 72 101, 102 Bavarian Pt 2/4 N 73 001 - 028 73 001 - 028 Palatine P 2.II 73 031 - 124 73 031 - 125 Bavarian D XII 73 125 ex Alsace-Lorraine T 5 73 131 - 139 73 131 - 139 Bavarian Pt 2/5 N 73 201 73 201 Bavarian Pt 2/5 H 74 001 - 368 74 001 - 358 Prussian T 11 74 401 - 1396 74 401 - 543, 545 - 1300 Prussian T 12 75 001 - 093 75 001 - 093 Württemberg T 5 75 101...302 75 101...302 Baden VI b Not all numbers were utilised 75 401...494 75 401...494 Baden VI c Built 1914 - 1918, Not all numbers were utilised 75 501 - 505, 511 - 588 75 501 - 505, 511 - 588 Saxon XIV HT 75 1001 - 1023, 1101–1120 75 1001 - 1023, 1101–1120 Baden VI c Built 1920/21 76 001 - 011 76 001 - 011 Prussian T 10 77 001 - 012 77 001 - 012 Palatine P 5 77 101 - 129 77 101 - 129 Palatine Pt 3/6, Bavarian Pt 3/6 78 001 - 281, 321 - 371 78 001 - 282, 351 - 523 Prussian T 18, Württemberg T 18 78 524 - 528 were follow-on orders by the DRG 79 001, 002 79 001, 002 Saxon XV HTV

Goods train tank locomotives