---
title: "SKTelecom: MCC 450 MNC 05"
mcc: "450"
mnc: "05"
plmn: "45005"
tadig: "KORSK"
brand: "SKTelecom"
operator: "SK Telecom"
country: "South Korea"
country_iso: "KR"
region: "Asia & Middle East"
technologies: ["2G", "3G", "4G", "5G"]
updated: "2025-04-09"
canonical: "https://mcc-mnc.org/networks/450_05"
---

# SKTelecom: MCC 450, MNC 05 (South Korea)

**SKTelecom** (operator: SK Telecom) is a mobile network in [South Korea](https://mcc-mnc.org/countries/south_korea.md) (Asia & Middle East), identified by MCC **450** and MNC **05**: PLMN ID 45005, also written 450-05 or 450 05, with the TADIG roaming code **KORSK**. It runs 2G, 3G, 4G and 5G. Calling: VoLTE: Supported.

## Identifiers

| Field | Value |
|---|---|
| MCC (Mobile Country Code) | 450 |
| MNC (Mobile Network Code) | 05 |
| PLMN ID (MCC+MNC) | 45005 |
| TADIG code | KORSK |
| Brand | SKTelecom |
| Operator | SK Telecom |
| Country | South Korea (KR) |
| Region | Asia & Middle East |
| Dialling code | — |
| Technologies | 2G, 3G, 4G, 5G |
| Last updated | 2025-04-09 |

## Technologies & bands

| Generation | Bands | Measured cells |
|---|---|---|
| 2G | [CDMA 800](https://mcc-mnc.org/coverage/cdma_800.md) | — |
| 3G | [UMTS 2100](https://mcc-mnc.org/coverage/umts_2100.md) | 295 |
| 4G | [LTE 1800](https://mcc-mnc.org/coverage/lte_1800.md), [LTE 2600](https://mcc-mnc.org/coverage/lte_2600.md), [LTE 2100](https://mcc-mnc.org/coverage/lte_2100.md), [LTE 850](https://mcc-mnc.org/coverage/lte_850.md) | 5,133 |
| 5G | [5G 3500](https://mcc-mnc.org/coverage/5g_3500.md), [5G 28000](https://mcc-mnc.org/coverage/5g_28000.md) | — |

## Voice & calling services

| Service | Status | Source |
|---|---|---|
| VoLTE | Supported | Android carrier config |
| 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 SKTelecom

SK Telecom (SKTelecom), operating in South Korea, stands as a dominant force in the nation's mobile telecommunications landscape. Identified by its Mobile Network Code (MNC) of 05 under the Mobile Country Code (MCC) 450, which designates South Korea, SK Telecom has pioneered advancements in cellular technology since its inception. Serving a large percentage of South Korea's population, SK Telecom competes with rival networks like KT Corporation and LG Uplus, constantly pushing the boundaries of speed and coverage. Its commitment to innovation is evident in its early adoption and deployment of 5G technology, solidifying South Korea's position as a global leader in connectivity and providing customers with blazing-fast mobile data speeds far exceeding those available in many other regions within Asia & Middle East.

Beyond simply providing connectivity, SK Telecom has significantly contributed to shaping South Korea's digital infrastructure. As one of the first to embrace cutting-edge technologies, including wideband code division multiple access (WCDMA) and long-term evolution (LTE), the operator invests heavily in research and development. SK Telecom also offers a variety of services beyond basic mobile communication, including IPTV, IoT (Internet of Things) solutions, and various online platforms. By continually expanding its offerings and investing in infrastructure, SK Telecom positions itself as more than just a mobile carrier; it aims to connect the whole of South Korea and be an integral engine of the country’s burgeoning tech ecosystem.

## APN settings

| Name | APN | Types | Protocol | MMSC | MMS proxy | MMS port | Source |
|---|---|---|---|---|---|---|---|
| SKT 3G INTERNET | `web.sktelecom.com` | cbs, default, fota, mms, supl | — | `http://omms.nate.com:9082/oma_mms` | smart.nate.com | 9093 | LineageOS |
| SKT 3G Roaming | `roaming.sktelecom.com` | cbs, default, fota, mms, supl | — | `http://omms.nate.com:9082/oma_mms` | smart.nate.com | 9093 | LineageOS |
| SKT LTE INTERNET | `lte.sktelecom.com` | cbs, default, fota, ia, mms, supl | IPV4V6 | `http://omms.nate.com:9082/oma_mms` | smart.nate.com | 9093 | AOSP |
| SKT LTE INTERNET | `lte.sktelecom.com` | cbs, default, fota, mms, supl | IPV4V6 | `http://omms.nate.com:9082/oma_mms` | smart.nate.com | 9093 | LineageOS |
| SKT LTE Roaming | `lte-roaming.sktelecom.com` | cbs, default, fota, mms, supl | — | `http://omms.nate.com:9082/oma_mms` | smart.nate.com | 9093 | LineageOS |
| SKT IMS | `IMS` | ims | IPV4V6 | — | — | — | AOSP |
| SKT IMS | `IMS` | ims | IPV4V6 | — | — | — | LineageOS |

Settings come from Android's AOSP and LineageOS APN lists and user corrections.

## Android carrier config highlights

| Setting | Value | Key |
|---|---|---|
| Allow emergency numbers in call log | Yes | `allow_emergency_numbers_in_call_log_bool` |
| Allow emergency video calls | Yes | `allow_emergency_video_calls_bool` |
| Support conference call | No | `support_conference_call_bool` |
| VoLTE available | Yes | `carrier_volte_available_bool` |
| Default MTU | 1440 | `default_mtu_int` |
| Enable mmsdelivery reports | No | `enableMMSDeliveryReports` |
| Enable mmsread reports | No | `enableMMSReadReports` |
| Enable smsdelivery reports | No | `enableSMSDeliveryReports` |
| Max MMS image height | 1944 | `maxImageHeight` |
| Max MMS image width | 2592 | `maxImageWidth` |
| Max MMS size (bytes) | 1048576 | `maxMessageSize` |
| Bandwidth | GPRS:24,24, EDGE:70,18, UMTS:115,115, CDMA-IS95A:14,14, CDMA-IS95B:14,14, 1xRTT:30,30, EvDo-rev.0:750,48, EvDo-rev.A:950,550, HSDPA:4300,620, HSUPA:4300,1800, H… | `bandwidth_string_array` |
| Carrier instant lettering encoding | EUC-KR | `carrier_instant_lettering_encoding_string` |
| Carrier instant lettering escaped chars | "\ | `carrier_instant_lettering_escaped_chars_string` |
| Carrier instant lettering invalid chars | [\n] | `carrier_instant_lettering_invalid_chars_string` |
| Carrier instant lettering length limit | 16 | `carrier_instant_lettering_length_limit_int` |

## Cell towers

OpenCelliD has measured **5,428** cells on this network across 348 location/tracking areas, first seen 2015-09-18 and last seen 2026-09-03 (data as of 2026-09-27).

| Radio | Generation | Cells |
|---|---|---|
| UMTS | 3G | 295 |
| LTE | 4G | 5,133 |

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 South Korea

| MCC | MNC | Network | TADIG |
|---|---|---|---|
| 450 | 01 | [Globalstar Asia Pacific](https://mcc-mnc.org/networks/450_01.md) | — |
| 450 | 02 | [KT](https://mcc-mnc.org/networks/450_02.md) | — |
| 450 | 03 | [Power 17](https://mcc-mnc.org/networks/450_03.md) | — |
| 450 | 04 | [KT](https://mcc-mnc.org/networks/450_04.md) | — |
| 450 | 06 | [LG U](https://mcc-mnc.org/networks/450_06.md) | KORLU |
| 450 | 07 | [KT](https://mcc-mnc.org/networks/450_07.md) | — |
| 450 | 08 | [olleh](https://mcc-mnc.org/networks/450_08.md) | KORKF |
| 450 | 11 | [Tplus](https://mcc-mnc.org/networks/450_11.md) | — |
| 450 | 12 | [SKTelecom](https://mcc-mnc.org/networks/450_12.md) | — |

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