S10 (UPU standard)
The identifiers consist of a two letter service indicator code, an eight digit serial number (in the range 00000000 to 99999999), a single check-digit, and a two-letter ISO country code—the latter identifying the issuing postal administration's country.
With increased liberalization and the possibility of multiple postal services operating in the same country, the use of country codes to designate the postal service is a problem. To solve this, each country has a designated postal service that controls all S10 identifiers from that country; any competing postal services will have to cooperate with the designated owner. The organization assigned by the UPU member country shall manage the issue and use of S10 identifiers, among all the operators under the authority of that UPU member country, in such a way as to ensure that no S10 identifier is reused within a period of 12 calendar months. A period of 24 calendar months, or longer, is recommended.
Service indicator codes
|AV-AZ||domestic, bilateral, multilateral use only, identifying RFID-tracked e-commerce items|
|BA-BZ||for domestic, bilateral, multilateral use only|
|CA-CZ||Parcel post; the use of CZ requires bilateral agreement. It is not required to use CV for insured parcels but if the service indicator CV is used, then it is recommended that it be used only on insured parcels.|
|DA-DZ||for domestic, bilateral, multilateral use only|
|EA-EZ||EMS; the use of EX–EZ requires bilateral agreement|
|GA||for domestic, bilateral, multilateral use only|
|GD||for domestic, bilateral, multilateral use only|
|HA-HZ||e-commerce parcels; the use of HX–HY requires multilateral agreement; the use of HZ requires bilateral agreement|
|JA-JZ||reserved; cannot be assigned as valid service indicator values|
|KA-KZ||reserved; cannot be assigned as valid service indicator values|
|LA-LZ||Letter post trackable, several subtypes; the use of LZ requires bilateral agreement|
|MA-MZ||Letter post: M bags|
|NA-NZ||for domestic, bilateral, multilateral use only|
|PA-PZ||for domestic, bilateral, multilateral use only|
|QA-QM||Letter post: IBRS (International Business Reply Service)|
|RA-RZ||Letter post: registered, but not insured delivery. The use of RZ requires bilateral agreement.|
|SA-SZ||reserved; cannot be assigned as valid service indicator values|
|TA-TZ||reserved; cannot be assigned as valid service indicator values|
|UA-UZ||Letter post: items other than LA–LZ (Express), MA–MZ (M bags), QA–QM (IBRS), RA–RZ (registered), VA–VZ (insured), subject to customs control, i.e. bearing a CN 22 or CN 23|
|VA-VZ||Letter post insured; the use of VZ requires bilateral agreement|
|WA-WZ||reserved; cannot be assigned as valid service indicator values|
|ZA-ZZ||for domestic, bilateral, multilateral use only|
Ignore the Service Indicator Code and Country Code Assign the weights 8, 6, 4, 2, 3, 5, 9, 7 to the 8 digits, from left to right Calculate S, the sum of each digit multiplied by its weight. For example, for the number 47312482, S = 4*8 + 7*6 + 3*4 + 1*2 + 2*3 + 4*5 + 8*9 + 2*7 = 200 Calculate the check digit, C, from C = 11 - (S mod 11) If C = 10, change to C = 0 If C = 11, change to C = 5 For the example 47312482 C = 11 - (200 mod 11) = 11 - 2 = 9.
- Serial Shipping Container Code, a related standard.
- "S10 Identification of postal items – 13-character identifier" (PDF). UPU. 2017-10-17. Retrieved 2018-02-08.
- http://www.upu.int, Service Indicator Codes Archived 2010-04-20 at the Wayback Machine
- Draft of S10:
- The UPU service indicator code list, list 124
- Online validator for S10 tracking numbers
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