Thailand runs two plate systems under two Acts that share no serial space or colour scheme. The Motor Vehicle Act plate is Thai-script: two category letters and up to four digits over the province spelled out in Thai — no code, the name itself. The Land Transport Act plate, for buses and licensed trucks, is the opposite: THAILAND plus numeric codes, entirely numeric end to end. Colour alone tells private from for-hire: black-on-white is an ordinary car, black-on-yellow a metered taxi, green-on-white the pickup that outnumbers every other body style on Thai roads.
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Thailand issues a Latin-script plate solely for vehicles crossing into neighbouring countries — and fitting it inside Thailand itself is an offence with a fine of up to 2,000 baht. The Thai plate goes back on before the car re-enters the country that issued it.
DLT press release no. 75, 18 March 2011
A regulation exists because Thailand ran out of trucks
The 2011 commercial-plate announcement's own preamble states its cause in one sentence: the truck code band 60–69 was "nearly used up", so 70–79 had to be opened. The plate on a Thai flatbed has that shortage written into its numbering.
DLT Announcement B.E. 2554, ข้อ ๒ (๓) (จ)
The night-driving red plate
Thailand's famous red dealer plate comes with a curfew from the statute itself: a car under it may only be driven between sunrise and sunset without the registrar's separate permission.
Motor Vehicle Act B.E. 2522 มาตรา ๒๗
standard plates
6
the default series issued to private road vehicles
Private car
The ordinary Thai car plate: two category letters and up to four digits in black, over the vehicle's province spelled out in full underneath — retroreflective white, embossed edge to edge.
The two letters name the issue series — the first runs in blocks tied to the vehicle class — and Thais recite them by their letter names: a กข plate reads aloud as "chicken, egg". The bottom line spells the registering province out in full; no code table needed.
ขส
กรมการขนส่งทางบก — Department of Land Transport — its abbreviation, embossed in a circle at lower right
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car
Private car 7+ seats
Same letter machinery as the sedans, in the van-series blocks — Bangkok's are reported under น, ฬ, อ and ฮ: mouse, kite, basin, owl in the recited names. Blue characters, not the letters, legally mark the more-than-seven-seat class.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: van, bus
Private pickup
Green characters carry the legal meaning; the letters carry the story. Bangkok pickup series are reported under ฒ, ณ, ต, ถ, บ, ป, ผ, ย, ร and ล — old man, novice monk, turtle, sack, leaf, fish, bee, giant, boat and monkey, in the recited letter names.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: truck
Private three-wheeler
Red characters mark the private three-wheeler; the two letters are ordinary series machinery — a class-tied first letter, a second that advances as numbers exhaust — with the province spelled out beneath, never coded.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: tricycle
LTA public yellow
The plate on every intercity bus and licensed truck: THAILAND and a numeric province code above a type code and a serial that must print its leading zeros — the reverse of the usual convention.
The first two digits are a statutory vehicle-type code: 10–19 fixed-route buses, 20–29 small-vehicle transport, 30–39 non-scheduled (charter) buses, 60–69 and 70–79 hired trucks — the 70s exist because the 60s nearly ran out, and the instrument says so itself.
10-19
รถโดยสารประจำทาง — scheduled (fixed-route) passenger transport
20-29
รถขนาดเล็ก — small-vehicle transport
30-39
รถโดยสารไม่ประจำทาง — non-scheduled passenger transport
60-69
รถบรรทุกไม่ประจำทาง — non-scheduled goods transport
70-79
รถบรรทุกไม่ประจำทาง — non-scheduled goods transport — the band added in 2011 when 60–69 neared exhaustion
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: bus, truck
LTA private white
Same statutory code table, private half: 40–49 private buses, 50–59 and 80–99 private trucks. The type code predicts the ground colour exactly — a code starting 4, 5, 8 or 9 must be white and privately operated.
40-49
รถโดยสารส่วนบุคคล — private passenger transport
50-59
รถบรรทุกส่วนบุคคล — private goods transport
80-99
รถบรรทุกส่วนบุคคล — private goods transport, second band
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: bus, truck
motorcycle plates
1
reduced-size series for motorcycles where format/design differs
Motorcycle private
Three lines: series letters with a leading numeral that is part of the base motorcycle format (cars only earn theirs on exhaustion), the province in the middle, digits below. One town outranks its province — a plate registered at Betong reads เบตง, never ยะลา.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: motorcycle
agricultural plates
1
farm vehicles/equipment where separately serialized
Agricultural orange
Orange ground covers road rollers, tractors and farm machines; the two letters are the standard class-tied series pairs, the province is spelled out beneath. The one plate family also excused from the windscreen tax sticker.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: tractor, machine
taxi plates
6
for-hire vehicles where separately serialized or colored
Taxi
Yellow ground, black characters: the metered taxi. Bangkok's taxi letter pairs famously open with ท — the letter recited as "soldier" — running ทค, ทง and onward. The category lives in the colours; the letters just count the fleet.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car
Interprovincial taxi
Red characters on yellow are the whole legal decode — an inter-provincial hire car. The two letters are series machinery, and the bottom line names the registering province in full.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car
Tuk-tuk
Green-on-yellow says tuk-tuk; the series letters are reported to be just three pairs — ศข, สก and สข: "pavilion-egg", "tiger-chicken", "tiger-egg" in the recited letter names. Scarcity on the plate to match the vehicle.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: tricycle
Small four-wheel hire
Navy characters on yellow mark the small shared four-wheeler — the songthaew class. The letters mean sequence, not category; the colour pair does the classing, the province line the geography.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car
Service green
The green ground is the decode — business, tour and rental service cars, the plate a visitor sees on hotel shuttles and hire cars. The two white letters carry no category of their own; they just walk the series forward, with the province written below.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car, van, bus
Motorcycle public
Yellow says motorcycle taxi; the three-line layout stacks series letters, then the province, then the number. The letters mean sequence, never place — Thai plates spell geography out rather than coding it.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: motorcycle
trailer plates
1
trailers and semi-trailers where separately serialized
Trailer orange
Same orange ground and same letter machinery as the agricultural classes — series pairs plus a spelled-out province. Nothing in the characters says "trailer"; the registration class carries that.
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: trailer
personalized plates
1
owner-chosen serials inside an official frame
Auction graphic
Here the digits are the meaning: ten statutory families of "desirable" numbers — repeats, round thousands, ascending runs, mirrored pairs — must go to public auction by law. All-nines fetch fortunes partly because เก้า, "nine", echoes ก้าว, "to move forward".
In the sample, 9 for any digit.
2003 → todayissued for: car, truck, van
dealer plates
1
trade/garage plates bound to a business, not a vehicle
Trade red
The red trade plate a dealer bolts on to move a car that isn't registered yet — and the one Thai plate that comes with a curfew written into the statute that created it.
In the sample, 9 for any digit.
1979 → todayissued for: car, truck, van, motorcycle
The Latin letters are the same registration in travel clothes: a DLT transliteration of the vehicle's Thai series letters, above the word THAILAND. Fit it for Laos or Yunnan; keep it on at home and the plate itself becomes a 2,000-baht offence.
In the sample, L stands for any letter and 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car, truck, van, bus
Test TC/QC
In the sample, L stands for any letter and 9 for any digit.
2017 → todayissued for: car, motorcycle
diplomatic plates
2
diplomatic corps (embassy) issuance, usually its own decode
Diplomatic
ท tracks ทูต, "diplomat", and the white ground alone separates it from the light-blue consular fleet. The numerals code the sending country — a list never published. Bangkok taxis also famously run under ท; layout and colour, not the letter, tell them apart.
ท
คณะผู้แทนทางการทูต — diplomatic corps
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car, motorcycle
Diplomatic 270×90 mm
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car, motorcycle
consular plates
2
consular corps where distinct from diplomatic
Consular
The letters track the key word of each category: ก for the consular corps (กงสุล), พ for an embassy's special agencies (พิเศษ), อ for international organisations (องค์การ). The numerals beneath code the sending country — a list the DLT has never published.
ก
คณะผู้แทนทางกงสุล — consular corps
พ
หน่วยงานพิเศษของสถานทูต — special agency of an embassy
อ
องค์การระหว่างประเทศหรือทบวงการชำนัญพิเศษแห่งสหประชาชาติ — international organisation or UN specialised agency
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car, motorcycle
Consular 270×90 mm
In the sample, 9 for any digit.
~2011 → todaydocumented from 2011 — the format is likely olderissued for: car, motorcycle
