NUMBER BLOCKS   1956-1957
← 1954-1955
1958-1959 →
The tables below have the 1956-57 number blocks for each state.
The type of plate was determined by the colors - refer to my Numbering and Colors page for details.

The information comes from the document 'Diario Oficial' published by the government of Mexico.
The issue dated 6 September 1955 contains the table with the license plate number blocks.

ALL VEHICLES   1956-57
State Numbers Assigned Overflow Series (observed)
DISTRITO FEDERAL 1 - 25-00-00
AGUASCALIENTES 25-00-01 - 26-00-00
BAJA CALIFORNIA 26-00-01 - 30-40-00 82-53-66 - 83-00-11
BAJA CALIFORNIA SUR 30-40-01 - 31-10-00
CAMPECHE 31-10-01 - 31-80-00
CHIAPAS 35-40-01 - 36-30-00
CHIHUAHUA 36-30-01 - 40-50-00
COAHUILA 31-80-01 - 34-70-00 89-22-74 - 89-29-97
COLIMA 34-70-01 - 35-40-00
DURANGO 40-50-01 - 42-20-00
GUANAJUATO 42-20-01 - 44-40-00
GUERRERO 44-40-01 - 45-20-00
HIDALGO 45-20-01 - 47-50-00
JALISCO 47-50-01 - 50-40-00
MEXICO 50-40-01 - 53-30-00
MICHOACAN 53-30-01 - 54-90-00 83-12-31 - 83-49-03
MORELOS 54-90-01 - 55-90-00
NAYARIT 55-90-01 - 56-60-00
NUEVO LEON 56-60-01 - 60-80-00
OAXACA 60-80-01 - 61-40-00
PUEBLA 61-40-01 - 63-90-00
QUERETARO 63-90-01 - 64-60-00
QUINTANA ROO 64-60-01 - 64-90-00
SAN LUIS POTOSI 64-90-01 - 66-30-00
SINALOA 66-30-01 - 67-80-00 79-30-27 - 79-69-24
SONORA 67-80-01 - 70-10-00 83-82-75 - 89-06-45
TABASCO 70-10-01 - 70-40-00
TAMAULIPAS 70-40-01 - 73-90-00 90-52-17 - 90-52-33
TLAXCALA 73-90-01 - 74-30-00
VERACRUZ 74-30-01 - 77-00-00
YUCATAN 77-00-01 - 78-10-00
ZACATECAS 78-10-01 - 78-80-00

Some states ran out of numbers and used an overflow series - presumably starting at 78-80-01 (but the lowest one seen is 79-30-27 in Sinaloa).