Wisconsin has issued various types of license plates to semi trucks and trailers since around the mid-1950s. While there aren't as many types today, mostly because of apportioned plates replacing the several types of out-of-state truck permits used back then, there's still plenty of types used for semi trucks and interstate commercial vehicles.

This page includes the following plate types:

Apportioned


Apportioned plates were first issued in 1978, when Wisconsin joined the IRP. Once apportioned plates were introduced, many other types of semi truck plates and out-of-state permits were issued less and many types were discontinued entirely.

From 1992 to 1998, numbers started at various points with seemingly no correlation to plates that were issued the previous year; due to this, in 1998 numbers reached 99999, and a subsequent overflow series starting at 10001 was issued briefly before the current base began issuance.

Base Variation Confirmed
Ranges
Expected
Ranges
78 10894
49416
Unknown
81 1205
9840
82 1091
15437
83 242
16513
84 247
15932
85 2842
14255
86 356
18395
87 4
18573
1
20602
88 1
20924
1
22368
89 169
22009
1
24393
90 3083
22971
1
26730
91 1
20607
1
27281
92 62736
85230
60001
89677
93 30274
53136
30001
61665
94 61480
90786
60001
95000
95 43815
70757
35001
80000
96 50001
79848
35001
82000
97 37355
64282
30001
80000
98 61005
92513
10719
50001
99999
10001
11000
1978 Wisconsin Apportioned
Gideon Nicksic
1978 Wisconsin Apportioned
Gideon Nicksic
1982 Wisconsin Apportioned
Timothy O'Connor
1982 Wisconsin Apportioned
Gideon Nicksic
1985 Wisconsin Apportioned
W. Yoder Auction
1986 Apportioned Sample
W. Yoder Auction
1988 Wisconsin Apportioned 5 Digit
Timothy O'Connor
1989 Wisconsin Apportioned 4 Digit
Timothy O'Connor
1989 Wisconsin Apportioned
Gideon Nicksic
1990 Wisconsin Apportioned 5 Digit
Andrew Turnbull
1991 Wisconsin Apportioned
Mike Swanson
1993 Wisconsin Apportioned
Gideon Nicksic
1994 Wisconsin Apportioned
Andrew Turnbull
1995 Wisconsin Apportioned
Andrew Turnbull
1997 Wisconsin Apportioned License Plate
Gideon Nicksic

In 1999, new multiyear apportioned plates were made. Early plates had the state name at the bottom and had a debossed "99" in the bottom right corner, while later plates were undated and had the state name at the top. Black on white plates were issued starting in 2018, at number 80000X.

Numbering likely started at 1, then went to 99999 before going to a 101W format and running to 99999W, which was followed by 10001X and plates ran to 79999X before the 2018 base came out starting at 80000X.

Base Variation Ranges
99 Offset Right 118
45811
Centered 47941
Offset Right 54164
54278
01 Centered 75088
97977
817W
Offset Right 3594W
4102W
Centered
Unknown Sheeting
7847W
11473W
Centered
3M Sheeting
9983W
17940W
Offset Right
3M Sheeting
24156W
54269W
Centered
3M Sheeting
62600W
65684W
Offset Right
3M Sheeting
69801W
98692W
10612X
50439X
Offset Right
Avery Sheeting
54808X
79899X
Expected
Ranges
1?
99999
101W
99999W
10001X
79999X
Centered 2000 Wisconsin Apportioned
Centered
Andrew Turnbull
April 1999 Wisconsin Apportioned
July 2000 Wisconsin Apportioned
Gideon Nicksic
May 2001 Wisconsin Apportioned
Timothy O'Connor
April 2004 Wisconsin Apportioned
April 2008 Wisconsin Apportioned
Gideon Nicksic
October 2008 Wisconsin Apportioned
Gideon Nicksic
March 2009 Wisconsin Apportioned
Andrew Turnbull
July 2009 Wisconsin Apportioned
Andrew Turnbull
November 2009 Wisconsin Apportioned
Andrew Turnbull
August 2010 Wisconsin Apportioned
Cody James Corbett
November 2010 Wisconsin Apportioned
Andrew Turnbull
January 2011 Wisconsin Apportioned
Andrew Turnbull
January 2012 Wisconsin Apportioned
Andrew Turnbull
June 2012 Wisconsin Apportioned
Cody James Corbett
July 2012 Wisconsin Apportioned
Andrew Turnbull
December 2012 Wisconsin Apportioned
Andrew Turnbull
September 2013 Wisconsin Apportioned
Gideon Nicksic
September 2017 Wisconsin Apportioned
Gideon Nicksic
October 2018 Wisconsin Apportioned
Gideon Nicksic
April 2023 Wisconsin Apportioned
April 2023
Gideon Nicksic
September 2023 Wisconsin Apportioned
Elriogrande77
December 2023 Wisconsin Apportioned
December 2023
Gideon Nicksic
February 2024 Wisconsin Apportioned
February 2024
Gideon Nicksic
June 2024 Wisconsin Apportioned
June 2024
Gideon Nicksic
September 2024 Wisconsin Apportioned
September 2024
Gideon Nicksic

In 2018, a new base with black numbers was issued to new registrants. Older plates are still valid, though it looks like they're slowly being phased out.

Numbering started at 80000X, and once 99999X was reached plates skipped to 10001Z, skipping the Y suffix because the "salutes veterans" specialty base uses a 12345Y. I'm not exactly sure what will be done after 99999Z is reached, though I'm guessing either 10001A, A10001, or 100001Z will be issued.

Base Variation Ranges
18 Avery
Sheeting
82185X
94884X
10nnnZ
66426Z
Expected
Ranges
80000X
99999X
10001Z
70457Z
May 2020 Wisconsin Apportioned
Gideon Nicksic
September 2023 Wisconsin Apportioned
September 2023
Gideon Nicksic
December 2023 Wisconsin Apportioned
December 2023
Gideon Nicksic
January 2024 Wisconsin Apportioned
January 2024
Gideon Nicksic
June 2024 Wisconsin Apportioned
April 2024
Gideon Nicksic
August 2024 Wisconsin Apportioned
August 2024
Gideon Nicksic

Apportioned Trailer


Apportioned license plates originally were issued to both trucks and their trailers. Apportioned trailer plates were issued to both semi trailers and full trailers from 1978 to 1989.

Base Variation Confirmed
Ranges
Expected
Ranges
78 100007
107638
Unknown
81 102308
102310
82 102354
102378
83 104026
105062
84 104809
85 107199
86 105199
87 103025
109105
100001
109200
88 101905
105841
100001
110132
89 100001
111181

In 1990 apportioned trailer plates split off into apportioned full trailer and apportioned semi trailer plates. From this point onward apportioned trailer plate registrations dropped significantly and barely reached 102000 on the last multiyear base before being discontinued in 2001.

Previously-issued plates are still valid according to the Wisconsin DOT.

Base Variation Confirmed
Ranges
Expected
Ranges
90 100001
100384
91 100001 100001
100398
92 100001
100400
93 100001
100128
94 100001
95 100971 100501?
96 101001 101001?
97 101501
98 Unknown
99 102191

Apportioned Semi Trailer


Apportioned semi trailer plates were first issued in 1990, set to expire in 2001. Only two series of apportioned semi trailer plates were issued, since California, the last state requiring apportioning for trailers, dropped the requirement in 2001.

Base Variation Ranges
01 1001
60330
99 ST10026
ST30940
2001 Wisconsin Apportioned Semi Trailer
Andrew Turnbull
1999-2001 Wisconsin Apportioned Semi Trailer
Andrew Turnbull

Semi Trailer


Semi trailer plates have been issued since at least 1954. Until 1987, semi trailer plates were split into 2 different subtypes, with "C" meaning commercial semi trailer and "P" meaning private semi trailer.

The first plates were captioned "trailer" and were only identifiable by their "PS" or "CS" prefix as opposed to a single-letter weight class prefix. By 1955 there was a full "semi-trailer" caption on the plates.

Base Variation C P
54 PS 168
55 CS 5451 PS 975
PS 979
56 Full Size Plate CS 4320 PS 4368
6"x12" Plate CS 7391
CS 7554
57 PS 4112
58 CS 8671 PS 3685
59 PS 5359
60 Groove CS 1779
CS 4184
PS 1428
No Groove 1CS 306 PS 6383
61 CS 1293
CS 8087
62 1CS 514
3CS 943
PS 5207
63 CS 7628
CS14313
PS 1298
64 PS 2770
PS 4577
65 CS 6006
CS15535
PS 2029
PS 2892
66 CS 4810
CS15127
PS 9535
67 PS 5942
PS13330
68 CS14058
CS15413
PS10118
PS10800
69 CS17900
CS17918
PS11271
PS11273
70 CS 1677 PS 310
PS12160
71 CS 1842
CS 19757
PS 2329
PS 9325
72 CS 1778
CS20480
PS13102
74 Normal
Font
CS 90
CS10498
Crude
Font
CS22899 PS13237
PS13330
Normal Font CS26770
CS27094
PS15240
PS18500
76 CS 3828
CS27382
PS 821
PS14614
78 CA 5190
CA24742
PA 2239
PA17798
80 CC 1268
CC25073
PC 1832
PC21599
82 CE 1956
CE17706
PE10288
PE21886
84 Tall Letters CG 3791
CG26450
PG12819
PG22831
Short Letters CG30995 PG24393
PG26612
1966 Wisconsin Semi Trailer PS
Andrew Turnbull
1971 Wisconsin Semi Trailer CS
Andrew Turnbull
1974 Wisconsin Semi Trailer CS
Andrew Turnbull
1976 Wisconsin Semi Trailer License Plate
Andrew Turnbull
1979 Wisconsin Semi Trailer License Plate
Andrew Turnbull
1981 Wisconsin Semi Trailer License Plate
Andrew Turnbull

In late 1987, a permanent baseplate was issued to semi trailers, and the numbering started at 200001.

Base Variation Ranges
87 Wide Font
Nonreflective
200001
343040
Narrow Font
Nonreflective
346838
429000
Narrow Font
3M Sheeting
435980
456914
Narrow Font
Avery Sheeting
458746
512220
Narrow Font
3M Sheeting
579125
633412
Narrow Font
Avery Sheeting
800700
Expected
Ranges
200001
851437
1987 Wisconsin Semi Trailer License Plate
Wide Font, Nonreflective
Andrew Turnbull
1987 Wisconsin Semi Trailer License Plate
Narrow Font, Nonreflective
Andrew Turnbull
1987 Wisconsin Semi Trailer License Plate
Reflective, 3M Sheeting
Andrew Turnbull
1987 Wisconsin Semi Trailer License Plate
Reflective, Avery Sheeting
Andrew Turnbull
1987 Wisconsin Semi Trailer License Plate
Reflective, 3M Sheeting
Andrew Turnbull

Rental Semi Trailer


Rental semi trailer plates at first used uncoded, fully numeric plates, most likely starting at 50001. They also were undated and were validated with 4th quarter insert stickers. The earliest rental semi trailer plate found is from 1971, but there are (unpainted) samples back to 1969 known.

1976-1979 plates used regular semi trailer stickers and from 1980 onward rental semi trailer plates used an "RA" stacked prefix format like other semi trailer plates.

Base Variation Ranges
69
70
71 50535
51418
72 51214
51560
74 51091
76 12345
78
80
82 RE 264
84
1971 Wisconsin Rental Semi Trailer License Plate
Andrew Turnbull

5-Year Semi Trailer


5-year semi trailer plates were first issued in 1978, set to expire in 1982. 5-year semi trailer plates were identical to normal semi trailer plates, however they would be issued unique stickers that would have long-term expiration intervals.

The last sticker issued was set to expire in 1990, which was issued in 1986 before the permanent semi trailer base came out.

Farm Semi Trailer


Farm semi trailer plates were semi trailer plates issued to farm vehicles between 1992 and 1998. Unlike normal semi trailer plates, these plates were registered yearly, and were discontinued just 6 years after they were introduced.

For the entirety of the type's issuance, they were completely indistinguishable from normal farm trailer plates, aside from their constant stacked "ST" prefix.

Base Variation Ranges
92 ST 1001
94 Wide Font
Narrow Font ST 5675

Tractor


Tractor plates have been available since at least the mid-1950s. They're issued to semi trucks, also known as truck-tractors, hence the name.

From their introduction in the 1950s to 1962, tractor plates in the double letter weight classes (YA-YX) only had capacity for 999 plates to be issued; in the early 1960s, once the format was exhausted a 1Yx01 format would be issued, which at least two weight classes (YB and YL) reached. However, that format also was exhausted by 1962, creating a second overflow format of 10Yx1 for at least the YL weight class. Beginning in 1963 the weight classes were stacked giving capacity for 9999 plates to be issued in each weight class, so there are no overflow formats from that point onward, with the exception of the YX class that later used YY and YZ as prefix letters.

Base
Weight
Variation D
8,000
E
10,000
F
12,000
G
14,000
H
16,000
J
18,000
K
20,000
L
22,000
M
24,000
N
26,000
R
28,000
S
30,000
T
32,000
V
34,000
X
36,000
Y
38,000
YA
40,000
YB
42,000
YC
44,000
YD
46,000
YE
48,000
YF
50,000
YG
52,000
YH
54,000
YJ
56,000
YK
58,000
YL
60,000
YM
62,000
YN
64,000
YR
66,000
YS
68,000
YT
70,000
YU
71,000
YV
72,000
YX-YZ
73,000
54


























 
 
 
 
 
55














 



 



 



 



56














 



 



 



 



57






















YK255
YL435
YL831








58































59































60









R 21



Y 738








YK 80








61













Y 823








YK650








62








N 91





1YB02 YC344







61YL4







63














YB 513








YL1113







64































65






















YK 258







YX1532?
66













Y 280




YF 339


YJ 209









67






















YK 5






YX 471
YX4127
68


















YF 427











YX4305
69










S 392








YG 321
YH 401


YL1709 YM 9


YS 407




70



















YG 178



YL 330
YL1482






YV1266
YX1965
YX6747
71
E 19

G 28



L 45













YH 348
YJ 217
YK 831
YL 958 YM 377
YN 244
YR 467
YS 331
YS 335



YX1045
YX8927
72 D 18






L 56
L 58
M 144
N 129


T 282
T 384

X 471
Y 279 YA 439


YD 259

YF 454
YG 121
YH 247
YJ 9
YJ 736
YK 9
YL 309

YR 795

YT 12
YU 5
YU 9

YY2367
YY4989
74










S 223





YD 91



YH 176


YM 4

YR 4
YS 4



YX5358
YY7452
76


G 38
H 19




N 106

S 261






YE 415
YF 1
YG 322



YL 7




YU 33
YV 845
YV2118
YX4119
YZ2524

In 1978, the weight classes changed, along with all other plates in the state of Wisconsin. The lightest weight class of tractor plate isn't exactly known, however the lowest weight class found is C and the lowest weight class with evidence of them being issued is the B weight class.

Base
Weight
Variation B
6,000
C
8,000
D
12,000
E
16,000
F
20,000
G
26,000
H
32,000
J
38,000
K
44,000
L
50,000
N
56,000
P
62,000
Q
68,000
R
73,000
S
76,000
T
80,000
78

DA 68

FA 1




LA1046






80






JA 142
JA 253



PA 160
RA 967
RA1539
SA1121
TA 13??
82








LA 662
LA 728

PA 156



TA 954
84

DA 51







PA 1

RA 243
SA 273
TA 109
TA2541
86









NA 606
PA 455

SA 850
TA 887
88












TA 1
90






LA 915


QA 103


TA 136?
December 1980 Wisconsin Tractor License Plate
Andrew Turnbull

In 1992, the X and M weight classes were added. The 1994 base started at xS 1, with x being the weight class.

Tractor plates under the D weight class were reportedly discontinued sometime during the 2009 base according to one of the supervisors at the DOT. Given the evidence I have on hand, my best guess is that they were discontinued around 2015. I have since uncovered evidence that they were issued until at least 2019.

Base
Weight
Variation B
6,000
C
8,000
X
10,000
D
12,000
E
16,000
F
20,000
G
26,000
H
32,000
J
38,000
K
44,000
L
50,000
M
54,000
N
56,000
P
62,000
Q
68,000
R
73,000
S
76,000
T
80,000
92














RA 168

TA 1
TA2990
94 Wide
Font



DS 8


HS 38 JS 194 KS 76
LS 565
LS1134
MS 125

QS 15
RS 287 SS 1
SS 194
TS 1
TS3322
Narrow
Prefix


XS 5


 



 





TS 5208
TS 5378
Wide
Prefix




ES 124
ES 153
FS 557
HS 559 JS 368
JS 743


MS 1356
PS 1060
PS 1440
QS 485
QS 516
RS 1077
RS 1313

TS 6220
TS23308
Expected
Ranges
BS 1? CS 1
CS 23
XS 1
XS 11
DS 1
DS 77
ES 1
ES 247
FS 1
FS 533
GS 1
GS 565
HS 1
HS 728
JS 1
JS 760
KS 1
KS 953
LS 1
LS 2701
MS 1
MS 2440
NS 1
NS 882
PS 1
PS1661?
QS 1
QS 1104
RS 1
RS 1828
SS 1
SS 1322
TS 1
TS23618
09 Expected
Ranges
BS 51
BS 61
CS 61
CS 95
CT 11
CT 13
XS 51
XS 100
DS 126
DS 223
ES 326
ES 641
FS 651
FS 999
FS 101
FS 473
GS 701
GS 1212
HS 826
HS 1670
JS 826
JS 1619
KS 1001
KS 1705
LS 3001
LS 4540
MS 3001
MS 5967
NS 1001
NS 1562
PS 1739
PS 3172
QS 1301
QS 2519
RS 1901
RS 3501
SS 1401
SS 2224
TS24501
TS58688
Confirmed
Ranges


DS 134 ES 347
ES 592
FS 889
FS 916
FS 379
FS 443
GS 883 HS 1621 JS 932
JS 1319
KS 1433
LS 4123 MS 3755
MS 5815
NS 1431 PS 2164
PS 3012
QS 1601
QS 2145
RS 1983
RS 3278
SS 1481
SS 1676
TS25204
TS58297
December 1994 Wisconsin Tractor License Plate
Andrew Turnbull
September 1995 Wisconsin Tractor License Plate
Brayson S.
March 1996 Wisconsin Tractor License Plate
Brayson S.
March 1999 Wisconsin Tractor License Plate
Andrew Turnbull
December 1999 Wisconsin Tractor License Plate
Andrew Turnbull
December 2000 Wisconsin Tractor License Plate
Timothy O'Connor
2001 Wisconsin Tractor Sep
Gideon Nicksic
September 2004 Wisconsin Tractor License Plate
Andrew Turnbull
December 2004 Wisconsin Tractor License Plate
Brayson S.
December 2006 Wisconsin Tractor License Plate
Brayson S.
January 2005 Wisconsin Tractor License Plate
Andrew Turnbull
December 2008 Wisconsin Tractor License Plate
Andrew Turnbull
November 2017 Wisconsin Tractor License Plate
Validated to 2017!
Brayson S.
2009 Wisconsin Tractor License Plate
Andrew Turnbull
2009 Wisconsin Tractor License Plate
Andrew Turnbull
March 2009 Wisconsin Tractor License Plate
Andrew Turnbull
June 2009 Wisconsin Tractor License Plate
Andrew Turnbull
December 2009 Wisconsin Tractor License Plate
Andrew Turnbull
December 2010 Wisconsin Tractor License Plate
Andrew Turnbull
December 2011 Wisconsin Tractor License Plate
Brayson S.
December 2012 Wisconsin Tractor License Plate
Andrew Turnbull
June 2021 Wisconsin Tractor License Plate
Gideon Nicksic
September 2021 Wisconsin Tractor License Plate
Gideon Nicksic
December 2021 Wisconsin Tractor License Plate
Gideon Nicksic
December 2021 Wisconsin Tractor License Plate (Restricted Use)
Gideon Nicksic
December 2023 Wisconsin Tractor License Plate
Brayson S.

Permit Reciprocity


Permit reciprocity plates were issued from 1956 to 1969. They were a type of permit issued to out-of-state trucks having limited reciprocity with Wisconsin.

Base Variation Ranges
56 PR 655
PR 1509
57 PR 1364
PR 3184
58
JUN 59
DEC 59 PR 4784
60 PR 7054
PR 7066
61 PR 9417
62 PR 940A
63 PR14161
64
65 PR18545
PR19795
66 PR20712
PR21353
67 PR20959
68 PR18547
PR24758
69 PR16327
PR28632
1961 Wisconsin Permit Reicprocity License Plate
Andrew Turnbull
1962 Wisconsin Permit Reciprocity License Plate
Andrew Turnbull

Prorate


In 1970, permit reciprocity plates were renamed to prorate plates. Prorate plates were issued from 1970 to 1971, then were discontinued and likely replaced with prorate bingoboard plate stickers.

Base Variation Ranges
70 PR32988
71 PR24977

Prorate Bingoboard


Prorate bingoboard plate stickers were issued from 1971 to at least 1989. As the name suggests, they were stickers issued to bingoboard plates.

Canadian Reciprocity


Canadian reciprocity license plates were issued to semi trucks having reciprocity with Canadian provinces. As of 1960 they were issued to semi trucks having reciprocity with Alberta, Manitoba, and Saskatchewan, and as of 1963 they were issued to semi trucks having reciprocity with Saskatchewan. Canadian reciprocity plates were discontinued around 1967.

Base Variation Ranges
56 CR 101
57 CR 733
58 CR 106
59
60 CR 532
61 CR 97
62
63
64
65 CR 93
CR 99

Reciprocity


"Reciprocity" plates were bicycle-sized identification plates issued to out-of-state trucks and trailers with a gross weight of 8,000lbs. or more, which had full reciprocity with Wisconsin. They were issued from 1952 to around 1961, and allegedly there was only one red-on-white baseplate however two other bases have been found.

Base Variation Ranges
?
?
?

Tax Only


Tax only license plates were another type of permit for out-of-state trucks having limited reciprocity with Wisconsin.

According to the 1985 Wisconsin plate guide, this confusing class of plates is "issued for vehicles currently registered in states having limited reciprocity with Wisconsin. Permits interstate operation only in accordance with reciprocal agreement with states imposing a tax on vehicles operated by Wisconsin residents."

These plates were issued from 1954 to 1986, then discontinued. Between 1975 and 1977 numbers for these plates dropped drastically and went from almost 10,000 numbers to less than 1000 in 1978, with the last found base in 1985 not even reaching 100.

Base Variation Ranges
55 244
56
57
58
59
60
61
62 926
63
64
65
66
67 639
68
69 453
475
70
71 123
72 9422
9775
74 6058
9953
75 543
8518
76 879
990
77 883
78 186
296
79 626
80 126
81 238
82 103
83 368
84 1
85 74
86 (0000)
1972 Wisconsin Tax Only License Plate
Gideon Nicksic
December 1973 Wisconsin Tax Only License Plate
Timothy O'Connor
Created February 3, 2019. Updated May 15, 2024.