---
title: "21Vianet Mobile Ltd.: MCC 454 MNC 21"
mcc: "454"
mnc: "21"
plmn: "45421"
operator: "21Vianet Mobile Ltd."
country: "Hong Kong"
country_iso: "HK"
region: "Asia & Middle East"
updated: "2025-04-09"
canonical: "https://mcc-mnc.org/networks/454_21"
---

# 21Vianet Mobile Ltd.: MCC 454, MNC 21 (Hong Kong)

**21Vianet Mobile Ltd.** is a mobile network in [Hong Kong](https://mcc-mnc.org/countries/hong_kong.md) (Asia & Middle East), identified by MCC **454** and MNC **21**: PLMN ID 45421, also written 454-21 or 454 21.

## Identifiers

| Field | Value |
|---|---|
| MCC (Mobile Country Code) | 454 |
| MNC (Mobile Network Code) | 21 |
| PLMN ID (MCC+MNC) | 45421 |
| TADIG code | — |
| Brand | — |
| Operator | 21Vianet Mobile Ltd. |
| Country | Hong Kong (HK) |
| Region | Asia & Middle East |
| Dialling code | — |
| Technologies | — |
| Last updated | 2025-04-09 |

## Technologies & bands

| Generation | Bands | Measured cells |
|---|---|---|
| 4G | No bands on file | 159 |
| Other | [MVNO](https://mcc-mnc.org/coverage/mvno.md) | — |

## Voice & calling services

| Service | Status | Source |
|---|---|---|
| VoLTE | Unknown | — |
| VoWiFi | Unknown | — |
| ViLTE | Unknown | — |
| VoNR | Unknown | — |

A service not marked Supported or Not supported is unknown: no data either way, not a sign that the network lacks it.

## About 21Vianet Mobile Ltd.

21Vianet Mobile Ltd. operates as a mobile network in Hong Kong, identified by Mobile Country Code (MCC) 454, which signifies it's a Hong Kong-based network, and Mobile Network Code (MNC) 21. Being present in a major Asian hub like Hong Kong places 21Vianet within a highly competitive telecommunications market, alongside other established players. Understanding their coverage and services is crucial for both locals and visitors relying on mobile connectivity within the region.

While specific details about 21Vianet Mobile Ltd. might be harder to come by compared to other, larger networks in Hong Kong, their presence adds to the diversity of mobile options. Users might choose 21Vianet based on specific service offerings, pricing plans or coverage areas where they excel. Examining coverage maps and user reviews can help gauge the quality and reliability of 21Vianet Mobile Ltd. compared to larger networks like CSL or SmarTone, providing consumers valuable information to make informed decisions.

## Cell towers

OpenCelliD has measured **159** cells on this network across 13 location/tracking areas, first seen 2020-10-08 and last seen 2026-07-28 (data as of 2026-09-27).

| Radio | Generation | Cells |
|---|---|---|
| LTE | 4G | 159 |

Locate a single cell by MCC, MNC, LAC/TAC and cell ID with the https://mcc-mnc.org/cell-id-lookup tool, `GET /api/v1/cells` or the MCP `lookup_cell` tool. Cell data from OpenCelliD (https://opencellid.org), licensed CC BY-SA 4.0.

## Other networks in Hong Kong

| MCC | MNC | Network | TADIG |
|---|---|---|---|
| 454 | 00 | [1O1O / One2Free / New World Mobility / SUNMobile](https://mcc-mnc.org/networks/454_00.md) | HKGTC |
| 454 | 01 | [CITIC Telecom 1616](https://mcc-mnc.org/networks/454_01.md) | — |
| 454 | 02 | [CSL Limited](https://mcc-mnc.org/networks/454_02.md) | — |
| 454 | 03 | [3](https://mcc-mnc.org/networks/454_03.md) | HKGH3 |
| 454 | 04 | [3 2G](https://mcc-mnc.org/networks/454_04.md) | HKGHT |
| 454 | 05 | [3 CDMA](https://mcc-mnc.org/networks/454_05.md) | — |
| 454 | 06 | [SmarTone](https://mcc-mnc.org/networks/454_06.md) | HKGSM |
| 454 | 07 | [China Unicom](https://mcc-mnc.org/networks/454_07.md) | — |
| 454 | 08 | [Truphone](https://mcc-mnc.org/networks/454_08.md) | — |
| 454 | 09 | [China Motion Telecom](https://mcc-mnc.org/networks/454_09.md) | — |
| 454 | 10 | [New World Mobility](https://mcc-mnc.org/networks/454_10.md) | HKGNW |
| 454 | 11 | [China-Hong Kong Telecom](https://mcc-mnc.org/networks/454_11.md) | — |
| 454 | 12 | [CMCC HK](https://mcc-mnc.org/networks/454_12.md) | HKGPP |
| 454 | 13 | [CMCC HK](https://mcc-mnc.org/networks/454_13.md) | — |
| 454 | 14 | [Hutchison Telecom](https://mcc-mnc.org/networks/454_14.md) | — |
| 454 | 15 | [SmarTone Mobile Communications Limited](https://mcc-mnc.org/networks/454_15.md) | — |
| 454 | 16 | [PCCW Mobile 2G](https://mcc-mnc.org/networks/454_16.md) | HKGMC |
| 454 | 17 | [SmarTone Mobile Communications Limited](https://mcc-mnc.org/networks/454_17.md) | — |
| 454 | 18 | [CSL Limited](https://mcc-mnc.org/networks/454_18.md) | — |
| 454 | 19 | [PCCW Mobile 3G](https://mcc-mnc.org/networks/454_19.md) | HKGM3 |
| 454 | 20 | [PCCW Mobile 4G](https://mcc-mnc.org/networks/454_20.md) | — |
| 454 | 22 | [263 Mobile Communications (HongKong) Limited](https://mcc-mnc.org/networks/454_22.md) | — |
| 454 | 23 | [Lycamobile](https://mcc-mnc.org/networks/454_23.md) | — |
| 454 | 24 | [Multibyte Info Technology Ltd](https://mcc-mnc.org/networks/454_24.md) | — |
| 454 | 25 | [Hong Kong Government](https://mcc-mnc.org/networks/454_25.md) | — |
| 454 | 26 | [Hong Kong Government](https://mcc-mnc.org/networks/454_26.md) | — |
| 454 | 29 | [PCCW Mobile CDMA](https://mcc-mnc.org/networks/454_29.md) | — |
| 454 | 30 | [China Data Enterprises Ltd](https://mcc-mnc.org/networks/454_30.md) | — |
| 454 | 31 | [CTExcel](https://mcc-mnc.org/networks/454_31.md) | — |
| 454 | 32 | [Hong Kong Broadband Network Ltd](https://mcc-mnc.org/networks/454_32.md) | — |
| 454 | 35 | [Webbing Hong Kong Ltd](https://mcc-mnc.org/networks/454_35.md) | — |

---

HTML version: https://mcc-mnc.org/networks/454_21 · Index for AI agents: https://mcc-mnc.org/llms.txt · Data is community-maintained; corrections welcome on the HTML page.