# Sejong

> Sejong Telecom, Inc. is a Korean listed infrastructure company combining electrical, communications and fire-protection construction with group businesses in enterprise connectivity, broadcasting software, blockchain and AI. Its fixed-line division became Sejong Networks in 2024; its private 5G business transferred to SMEC in 2025, and Snowman mobile services entered a phased wind-down in 2026.

- **Founded:** 1992
- **Headquarters:** Gwacheon, South Korea
- **Products:** Electrical, telecommunications and fire-protection construction, Sejong Networks connectivity, BlueBrick, BBRIC and TokenTrust, Snowman
- **Notable:** Listed on KOSDAQ in January 2000 under code 036630., Launched BlueBrick in January 2019., Industrial private 5G deployments included HD Hyundai shipyards.

## Products & services

- **Electrical, telecommunications and fire-protection construction** — Core parent-company work across power plants, public infrastructure, residential, multipurpose and production facilities, including overseas projects.
- **Sejong Networks connectivity** — Fixed-line division spun off in April 2024; enterprise leased lines, cloud connections, neutral IX, data centers and voice services.
- **BlueBrick** — Enterprise blockchain platform based on Ethereum and Hyperledger; blockchain business transferred to Sejong DX in April 2025.
- **BBRIC and TokenTrust** — Group blockchain initiatives for indirect real-estate investment and tokenized-securities technology; BBRIC advertises participation from KRW 10,000.
- **Snowman** — Historical consumer MVNO; phased service termination and subscriber transfer to GoGo Factory were being pursued in July 2026.
- **Private 5G networks** — Historical industrial deployments for shipyards and factories; business transferred to SMEC with final approval announced in July 2025.
- **Aircode broadcasting and commerce software** — Group company develops digital broadcasting and T-commerce solutions; acquired into the group in 2021.
- **Trolley AI** — Sejong DX enterprise AI agent offering identified in 2026 corporate disclosures.

## Achievements

- Listed on KOSDAQ in January 2000 under code 036630.
- Launched BlueBrick in January 2019.
- Industrial private 5G deployments included HD Hyundai shipyards.
- Construction webpage lists ISO 9001, ISO 14001 and ISO 45001 certifications.

## Latest updates

- **2026-07** — Major shareholder Sejong Corp. acquired four million newly issued shares for KRW 28 billion through third-party allotment.
- **2026-07** — Snowman phased termination and subscriber transfer to GoGo Factory were being pursued; joint recommended plans were offered.
- **2026-03** — FY2025 annual report described electrical construction as the parent’s main business and reported KRW 284.195 billion consolidated revenue.
- **2026-02** — Company held special safety training for safety and health managers at its Gwacheon headquarters.

## Links

- Website: https://www.sejongtelecom.net
- LinkedIn: https://www.linkedin.com/company/sejong-inc

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Profile page: https://yespress.io/sejong
Published by YesPress — https://yespress.io
Last updated: 2026-10-01