CMCU → Crowley · carrier prefix
CMCU Container Tracking — Crowley-Owned Prefix
Track on csight.crowley.com — official Crowley tracker
Crowley is the Florida-based Jones Act operator serving Puerto Rico, Central America and the Caribbean since 1892, as much a logistics group as a line.
One code covers its box pool, tracked through the csight.crowley.com portal.
4 letters + 7 digits, printed on the doors
CMCU check digit: worked example
C | M | C | U | 2 | 1 | 6 | 7 | 0 | 6 |
|---|---|---|---|---|---|---|---|---|---|
| 13 | 24 | 13 | 32 | 2 | 1 | 6 | 7 | 0 | 6 |
| ×1 | ×2 | ×4 | ×8 | ×16 | ×32 | ×64 | ×128 | ×256 | ×512 |
| 13 | 48 | 52 | 256 | 32 | 32 | 384 | 896 | 0 | 3072 |
Sum 4785 → 4785 mod 11 = 0 → check digit 0 → CMCU 216706-0
Crowley prefix family
| Prefix | CMCU (this page) |
|---|
Prefix register verified against two independent sources on 2026-08-03.
Tracking with Crowley
csight.crowley.com is a portal-style tracker; paste the CMCU number into its search.
Frequently asked questions
Who owns the CMCU container prefix?
CMCU is registered to Crowley, founded 1892 — one of 1 prefixes the line holds in the BIC register.
How do I track a CMCU container?
Track CMCU containers free on the official Crowley tracker at csight.crowley.com — paste the full 11-character number (like the CMCU example on this page) and no account is needed.
Is CMCU 2167060 a valid container number?
Yes — CMCU 216706-0 passes ISO 6346 validation: the weighted letter-and-digit sum for CMCU216706 leaves remainder 0 mod 11, giving check digit 0. The worked table for this CMCU example is on this page.
Is CMCU a shipping line prefix or a leasing company prefix?
CMCU is a shipping-line (carrier) prefix — Crowley both owns the boxes and moves them, so owner and tracker are the same company.