355 U.S. Customs Acceptance/Rejection
U.S. Customs and Border Protection (CBP) · X12 004010
U.S. Customs and Border Protection (CBP)’s published 355 specification, rendered as an interactive guide. Expand any segment to see its elements, data types, lengths and accepted codes — then validate your own document against it below.
Specification
32 of 32 segments
HEADING
ST
Transaction Set Header ST
pos 010
Optional
max —
M10
Manifest Identifying Information M10
pos 020
Required
max —
K1
Remarks K1
pos 030
Optional
max 10
P4 Looprequired
P4
Us Port Information P4
pos 040
Required
max —
K1
Remarks K1
pos 050
Optional
max 10
LX Loop
LX
Assigned Number LX
pos 060
Required
max —
M13 Loop
M13
Manifest Amendment Details M13
pos 070
Required
max —
K1
Remarks K1
pos 080
Optional
max 10
M11 Loop
M11
Manifest Bill Of Lading Details M11
pos 090
Required
max —
K1
Remarks K1
pos 100
Optional
max 10
N9 Loop
N9
Reference Identification N9
pos 105
Required
max —
K1
Remarks K1
pos 107
Optional
max 10
N1 Loop
N1
Name N1
pos 110
Required
max —
K1
Remarks K1
pos 120
Optional
max 10
N3 Loop
N3
Address Information N3
pos 130
Required
max —
K1
Remarks K1
pos 140
Optional
max 10
N4 Loop
N4
Geographic Location N4
pos 141
Required
max —
K1
Remarks K1
pos 142
Optional
max 10
M15 Loop
M15
Us Customs Events Advisory Details M15
pos 163
Required
max —
K1
Remarks K1
pos 164
Optional
max 10
VID Loop
VID
Conveyance Identification VID
pos 170
Required
max —
K1
Remarks K1
pos 175
Optional
max 10
VC Loop
VC
Motor Vehicle Control VC
pos 200
Required
max —
K1
Remarks K1
pos 205
Optional
max 10
N10 Loop
N10
Quantity And Description N10
pos 210
Required
max —
K1
Remarks K1
pos 215
Optional
max 10
H1 Loop
H1
Hazardous Material H1
pos 220
Required
max —
K1
Remarks K1
pos 230
Optional
max 10
H2 Loop
H2
Additional Hazardous Material Description H2
pos 240
Required
max —
K1
Remarks K1
pos 250
Optional
max 10
DETAIL
K3
File Information K3
pos 010
Required
max —
SE
Transaction Set Trailer SE
pos 020
Optional
max —
Validate a 355
Paste or upload a document and check it against U.S. Customs and Border Protection (CBP)’s published rules — segment order and repetition, required elements, field lengths, data types and accepted codes. Nothing is stored.
Go live on U.S. Customs and Border Protection (CBP)’s 355 in days, not months
Weredi maps this guide to your ERP, runs the test cycle with U.S. Customs and Border Protection (CBP), and keeps the spec current as it changes.