| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YD/T 4161-2022 | English | 459 |
Add to Cart
|
4 days [Need to translate]
|
(User interface and program requirements for number portability service)
| Valid |
YD/T 4161-2022
|