No. Description
6 RoHS compliance (one character). Y indicates
environmental-friendly processing.
7 Internal model, that is, product name.
● If the rst two digits are 21, see Figure 8-2.
A product SN starts with SN or ESN. The following is an example.
Figure 8-2 ESN example
No. Description
1 SN ID (two characters), which is 21.
2 Material identication code (eight digits), that is,
processing code.
3 Vendor code (two characters). The value 10 indicates
Huawei and other values indicate outsourcing
vendors.
4 Year and month (two characters).
● The rst character indicates the year. The digits 1
to 9 indicate 2001 to 2009, the letters A to H
indicate 2010 to 2017, the letters J to N indicate
2018 to 2022, and the letters P to Y indicate 2023
to 2032.
NOTE
The years from 2010 are represented by upper-case letters
excluding I, O, and Z because the three letters are similar to
the digits 1, 0, and 2.
The second character indicates the month. Digits 1 to
9 indicate January to September, and letters A to C
indicate October to December.
5 Sequence number (six characters).
6 RoHS compliance (one character). Y indicates
environmental-friendly processing.
7 Internal model, that is, product name.
Huawei Servers
Troubleshooting 8 Common Operations
Issue 20 (2020-09-25) Copyright © Huawei Technologies Co., Ltd. 127
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