A Strong Network Starts With Strong Infrastructure When organizations evaluate network providers, one question is frequently overlooked: "Where exactly are the cables — and who owns them?"

Network reliability is not determined solely by the SLA printed in a contract. It is determined by the quality, density, and redundancy of the physical infrastructure beneath it.

This article takes you inside the KIRZ fiber optic network — built and maintained over 30 years — and explains how its coverage across Bangkok and beyond translates into real-world performance for enterprise customers.

KIRZ Network by the Numbers

KIRZ has owned and operated its own fiber optic infrastructure since 1995. The network today comprises:

Where Does the KIRZ Network Reach?

The KIRZ network covers Bangkok and its surrounding provinces comprehensively — both above ground and underground — through three distinct infrastructure layers.

1. KIRZ Proprietary Network

Over 1,500 kilometers of fiber optic cable owned and maintained directly by KIRZ, covering the key commercial and industrial zones of Bangkok:

• Central Business Districts: Silom, Sathorn, Sukhumvit, Asok, Rama 9
• IT and Data Center Zones: Bang Na, Lat Krabang, Ramkhamhaeng
• Industrial and Commercial Areas: Prawet, Lat Phrao, Bang Kapi
• Greater Bangkok: Nonthaburi and Samut Prakan provinces

2. MEA Partnership Network

KIRZ holds access rights to Dark Fiber on the Metropolitan Electricity Authority (MEA) underground cable network, which runs beneath every major road in Bangkok, Nonthaburi, and Samut Prakan.

Key advantages:

• Path Diversity: Physically separate routes from KIRZ's own cables, eliminating single points of failure
• Broader building reach: Access to commercial buildings connected to the MEA network but not yet on KIRZ's own route
• On-net Buildings: More than 200 commercial office buildings within the MEA coverage area are on KIRZ's on-net list

3. EGAT Partnership Network (OPGW)

KIRZ connects to the Optical Ground Wire (OPGW) infrastructure of the Electricity Generating Authority of Thailand (EGAT), which runs alongside high-voltage power transmission lines across the entire country.

Strategic significance:

• Nationwide reach: Connectivity from Bangkok to every province along the power transmission corridor
• Cross-border connectivity: EGAT's OPGW links extend to neighboring countries — Laos, Cambodia, and Malaysia
• Long-haul backbone: The ideal foundation for organizations needing Private Line connectivity beyond Bangkok

Data Centers KIRZ Connects To

KIRZ maintains direct fiber connections to more than 18 leading Data Centers in Bangkok:

Bang Na — Lat Krabang Zone:

• NTT Data Center Bang Na
• TCC Tech Bang Na
• STT DGC (Digital Gateway Centre)

Central Bangkok Zone:

• NT Data Center Bang Rak
• Telehouse Bangkok
• TRUE Internet Data Center

Other Locations:

• MEA Data Center
• The Cloud (AWN)
• AIMs Data Center
• Pacific Internet

Direct fiber connectivity to these facilities means that organizations using colocation or cloud services within them can access low-latency Private Line connectivity immediately — without routing through the public internet.

Why Owning the Network Matters

Some network providers do not own the cables they sell — they lease capacity from a third party and resell it. This arrangement affects SLA execution, incident response speed, and long-term cost.

KIRZ is different in three important ways:

1. End-to-End Control When an incident occurs, KIRZ resolves it directly without coordinating across providers. This significantly reduces MTTR (Mean Time to Repair) and keeps SLA commitments achievable.

2. Custom Route Design Organizations with specific fiber routing requirements — for example, connecting two Data Centers along a path that avoids known risk zones — can co-design the route with KIRZ's engineering team rather than accepting a pre-defined product.

3. True Path Diversity From Three Networks By combining KIRZ's own fiber with MEA and EGAT infrastructure, it is possible to design fully separate primary and backup paths — routes that share no common physical segment. This is the only architecture that genuinely eliminates single points of failure at the physical layer.

Who Should Consider KIRZ Network Coverage?

• Data Center Operators requiring low-latency DCI between facilities in Bangkok
• Organizations with multiple Bangkok offices needing stable Private Line connectivity across sites
• Enterprises pursuing Dark Fiber to build a fully private network infrastructure
• ISPs and Telecoms seeking wholesale fiber or backbone capacity in Bangkok
• Organizations using colocation at any of the 18+ Data Centers directly connected to KIRZ

Conclusion — Infrastructure Built for Enterprise, Over 30 Years

The KIRZ fiber optic network is not simply cable that was installed and left in place. It is infrastructure that has been designed, maintained, and continuously expanded over more than three decades of enterprise network delivery.

With 1,500+ kilometers of fiber, 35 switching nodes, direct connections to 18+ leading Data Centers, and strategic partnerships with MEA and EGAT — KIRZ is positioned to underpin your organization's network wherever it needs to reach in Bangkok or across Thailand.

Want to verify whether KIRZ coverage reaches your sites of interest?

Contact KIRZ's team at kirz.com or call 02-770-9770.