HMMU → HMM · carrier prefix
HMMU Container Tracking — HMM-Owned Prefix
Track on hmm21.com — official HMM tracker
HMM, formerly Hyundai Merchant Marine, is South Korea’s national container line and the operator of some of the largest 24,000-TEU vessels ever built.
Its two codes reflect the rebrand: the newer HMM registration circulates beside the Hyundai-era one, both tracked on hmm21.com.
4 letters + 7 digits, printed on the doors
HMMU check digit: worked example
H | M | M | U | 5 | 6 | 5 | 7 | 6 | 1 |
|---|---|---|---|---|---|---|---|---|---|
| 18 | 24 | 24 | 32 | 5 | 6 | 5 | 7 | 6 | 1 |
| ×1 | ×2 | ×4 | ×8 | ×16 | ×32 | ×64 | ×128 | ×256 | ×512 |
| 18 | 48 | 96 | 256 | 80 | 192 | 320 | 896 | 1536 | 512 |
Sum 3954 → 3954 mod 11 = 5 → check digit 5 → HMMU 565761-5
HMM prefix family
| Prefix | HMMU (this page) HDMU |
|---|
Prefix register verified against two independent sources on 2026-08-03.
Tracking with HMM
hmm21.com verified-negative for deep links — the Track & Trace form is the way in.
Frequently asked questions
Who owns the HMMU container prefix?
HMMU is registered to HMM, founded 1976 — one of 2 prefixes the line holds in the BIC register, alongside HDMU.
How do I track a HMMU container?
Track HMMU containers free on the official HMM tracker at hmm21.com — paste the full 11-character number (like the HMMU example on this page) and no account is needed.
Is HMMU 5657615 a valid container number?
Yes — HMMU 565761-5 passes ISO 6346 validation: the weighted letter-and-digit sum for HMMU565761 leaves remainder 5 mod 11, giving check digit 5. The worked table for this HMMU example is on this page.
Is HMMU a shipping line prefix or a leasing company prefix?
HMMU is a shipping-line (carrier) prefix — HMM both owns the boxes and moves them, so owner and tracker are the same company.