MPAN Core
MeteringThe last 13 digits of any MPAN that uniquely identify a meter point - this is the part validated by the check digit and used in most industry systems.
The MPAN Core is the final 13 digits of any full MPAN, regardless of whether it's a 21-digit legacy format or 22-digit MHHS format. It's the critical identifier used in settlement systems and data flows across the energy industry.
Structure of the MPAN Core (13 digits):
| Component | Digits | Description |
|---|---|---|
| Distributor ID | 2 | DNO (10-23) or IDNO (24+) identifier |
| Unique Identifier | 8 | Meter point's unique reference within the network |
| Extended Identifier | 2 | Additional identification digits |
| Check Digit | 1 | Validation digit (prime weights calculation) |
Why the MPAN Core matters:
Industry data flows: Most industry systems (supplier switching, settlement, meter registration) use only the 13-digit MPAN Core, not the full 21/22-digit MPAN with supplementary data.
Check digit validation: The single check digit at the end validates only the MPAN Core. It's calculated using the first 12 digits with prime weights [3, 5, 7, 13, 17, 19, 23, 29, 31, 37, 41, 43] and the formula (sum % 11) % 10.
Consistent across formats: Whether you have a legacy 21-digit or MHHS 22-digit MPAN, the last 13 digits are always the MPAN Core.
Common misconception: Many people think the "last 3 digits" are all check digits - in fact, only the FINAL digit is a check digit. The previous 2 digits are part of the extended identifier.
Example
Full MPAN: 03 801 100 10 12345678 901 | MPAN Core: 1012345678901 (last 13 digits)Related terms
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