What does NBTC regulate in Thailand?

NBTC (National Broadcasting and Telecommunications Commission) is the independent authority created by the NBTC Act 2010. It covers three domains: broadcasting (TV, sound radio), telecommunications (fixed and mobile carriers, licensing) and radio spectrum (frequency plans, transmitter type approval). Any product that radiates intentionally and is placed on the Thai market falls within its scope, with no minimum power threshold.

What are Classes A, B, C and D?

NBTC sorts radio equipment into classes of increasing risk. Class A groups low-risk products, eligible for a declarative procedure (SDoC) without a mandatory NBTC laboratory test. Classes B, C and D require type approval with a test report from a recognised lab and review by a certification body designated by NBTC. The class depends on technology, power and intended use. A consumer Wi-Fi module typically sits in B, a cellular terminal in C or D depending on integration.

Must the NBTC number appear on the label?

Yes. The NBTC registration number issued after type approval is mandatory on the physical product label, in an area visible without disassembly. The label must also carry Thai-language regulatory information where the regulation requires it (in particular warnings and end-user instructions). A missing or illegible NBTC number is a frequent cause of customs blockage and withdrawal during market surveillance.

Is a local representative in Thailand required?

Yes. NBTC requires a Thai-resident actor to be the holder of the type approval dossier and of the product registration on the portal. This is typically the importer, the Thai subsidiary of the manufacturer or a homologation agent. Without a local representative, the filing is not accepted, and regulatory responsibility cannot be attached to an identified addressee on the territory.

Has Thailand opened the 6 GHz Wi-Fi band?

Thai decisions on 5 GHz and 6 GHz Wi-Fi follow their own timeline, distinct from the FCC and ETSI calendars. The NBTC allocation table must be checked at the time of filing, because bands open elsewhere may remain partly or wholly closed in Thailand, and vice versa. 5G uses mainly bands n40, n41, n78 and n79, deployed by local operators. A radio firmware configured against an ETSI or FCC dossier does not necessarily comply with the Thai plan.

Does the True / dtac merger change carrier certification?

The merger between True Corporation and Total Access Communication (dtac), completed in 2023 under the TrueMove H banner, has reduced the Thai cellular market to two main operators: AIS and the merged group. For a cellular module, this in principle simplifies carrier-acceptance checks, but the internal procedures of the two merged entities may coexist during the transition. Carrier acceptance is distinct from NBTC type approval, which remains mandatory in all cases.

Does NBTC type approval cover the installation of a fixed station?

No. NBTC type approval certifies the equipment model placed on the market, but the deployment of fixed stations (transmission sites, antennas, microwave links) follows a separate authorisation process. The practice is comparable to the SACFA regime in India: the equipment is certified as a product, the installation as a site. For consumer products or mobile terminals, the question does not arise.

What are the most frequent pitfalls?

Four recur: misclassification of the NBTC class (A claimed wrongly for a product that falls into B or C), absence of Thai text on the label or manual, NBTC number not visible on the physical product, and carrier acceptance launched against the pre-merger True or dtac organisation while the merger has reorganised the technical interfaces.

Thailand NBTC: radio and telecom certification

Author Hugues Orgitello Last updated 27 May 2026 ~11 min read

Guide - NBTC, Thailand

Certifying a radio product for Thailand runs through NBTC, the independent authority established by the NBTC Act 2010, which combines the regulation of broadcasting, telecommunications and spectrum. The scheme rests on a four-class sorting of equipment (A, B, C, D), a type approval issued by a certification body designated by NBTC, a product registration on the NBTC portal, a label that carries the NBTC number and the required Thai-language information, and a Thai local representative. This page presents the regulatory map, the class breakdown, the Thai band plan (5 GHz and 6 GHz Wi-Fi, 5G n40, n41, n78, n79), the carrier landscape after the 2022 True / dtac merger, and the comparison with the European and US regimes.

Institutional map

The Thai radio equipment market is regulated by NBTC alone for spectrum and type approval, but several actors take part in the chain of access to market.

Actor	Scope	Type of decision
NBTC (National Broadcasting and Telecommunications Commission)	Broadcasting, telecoms, spectrum, type approval	NBTC registration number, A / B / C / D class
NBTC-designated certification body	Technical review of the dossier, examination of test reports	Recommendation of type approval, forwarded to NBTC
Recognised test laboratory	Radio measurements (emissions, frequency plans, power)	Test report consistent with the NBTC scope
Thai local representative	Holder of the dossier, portal filing, labelling	Continuous regulatory responsibility
Thai customs	Physical control of shipments on entry	Verification of NBTC number and label compliance
Mobile operators (AIS, TrueMove H)	Network acceptance for cellular terminals	Internal carrier approval, distinct from NBTC

NBTC is an independent authority instituted by the NBTC Act B.E. 2553 (2010, Buddhist calendar). It merged the former sectoral regulators (broadcasting on one side, telecoms on the other) into a single commission, comparable in its architecture to the French ARCEP for telecoms or to the US FCC for the combined radio plus telecom plus broadcast scope. Its independence is statutory: commissioners are appointed for a fixed term and the authority operates with its own budget.

Type approval is not reviewed directly by NBTC. It goes through a designated certification body, which examines the dossier (test reports, product datasheet, schematics, manufacturer declaration) and issues a recommendation. NBTC then grants the certificate and lists the product in its register.

Classes A, B, C, D: the sorting table

The NBTC sorting is the structural element of the regime. It determines the applicable procedure (declarative or test-based), the review time and the cost of the dossier.

Class	Risk profile	Procedure	Typical examples
Class A	Low: low power, mature technologies, non-critical use	Supplier declaration of conformity (SDoC), simplified registration	Low-power RF remote controls, some SRD modules, marginal non-intentional radiators
Class B	Moderate: consumer products with usual radio functions	Type approval with test report from a recognised lab, review by a certification body	Wi-Fi modules, Bluetooth, common SRD equipment, DECT phones
Class C	High: products with significant spectral impact or professional use	Reinforced type approval, broader tests, review of usage scenarios	Consumer cellular terminals, cellular IoT, some network equipment
Class D	Very high: infrastructure equipment, high power, operator-critical	Type approval with the strictest requirements, sometimes paired with an installation file	Base stations, microwave links, core-network equipment

The boundary between classes is not always intuitive: a single product can shift from B to C depending on the combination of embedded technologies. The class is decided during review, on the basis of the product datasheet and the test reports. A manufacturer that claims Class A for a product that NBTC reclassifies as B loses several weeks: the dossier is rejected, must be reworked with full tests and refiled. This is one of the most frequent pitfalls for new entrants.

Declarative procedure under Class A

Class A rests on a Supplier's Declaration of Conformity (SDoC) issued by the manufacturer or its local representative. The expected content is tight: product identification, radio technologies, frequency ranges, maximum power, reference to applicable standards (typically IEC or equivalents), and declarant commitment. NBTC may request after-the-fact tests in case of doubt or market surveillance.

Full procedure under Classes B, C, D

For Classes B to D, the dossier always includes:

a radio test report issued by a recognised laboratory, covering out-of-band emissions, power, spectral behaviour and coexistence scenarios,
a detailed product datasheet (hardware architecture, antennas, chipsets, radio firmware),
a manufacturer declaration on conditions of use and compliance with Thai frequency plans,
a review by the designated certification body that issues the recommendation to NBTC,
fee payment by the Thai local representative.

Review typically takes from a few weeks to a few months depending on class, availability of test reports and the workload of the certification bodies.

Thai band plan

The Thai frequency plan is published by NBTC in its national allocation table, aligned with ITU Region 3 but with national decisions of its own. Several points stand out.

Wi-Fi bands

Band	EU (ETSI)	US (FCC)	Thailand (NBTC)
2.4 GHz Wi-Fi / BT	EN 300 328	Part 15.247	Open, own EIRP limits to verify
5 GHz Wi-Fi	EN 301 893, harmonised sub-bands	U-NII (Part 15)	Open, Thai decisions of their own on U-NII-2 and U-NII-3
6 GHz Wi-Fi (Wi-Fi 6E / 7)	Open with restrictions per Member State	Opened by FCC	Distinct Thai decision, to be verified in the current NBTC table

Operational takeaway: the Thai timeline on 5 GHz and 6 GHz Wi-Fi bands is specific and evolves. An ETSI or FCC dossier reused as is may contain channels not authorised in Thailand. The radio firmware must include a TH entry, correctly set for the bands open in Thailand, in the regulatory domain table.

5G bands

3GPP band	Range	Use in Thailand
n40	2.3 GHz TDD	Deployed by local operators
n41	2.5 GHz TDD	Deployed, complementary mid-band
n78	3.5 GHz TDD	Core 5G band, main capacity carrier
n79	4.5 GHz TDD	Deployed depending on operator and area

The n40 plus n41 plus n78 plus n79 set forms the Thai 5G skeleton. A cellular module that only supported European or North American bands (n1, n3, n7, n28, n77) without n40 or n41 would lose part of the Thai mid-band coverage. The presence of n40 and n41 in the module band-table is therefore not only an NBTC compliance point but a commercial-coverage point: a module that ignores the Thai mid-band stack will fall back to the legacy LTE layer in areas where 5G NR mid-band is the deployed capacity layer. The same logic applies to n79 in zones where operators have opted for the 4.5 GHz layer rather than n78.

Sub-GHz and SRD

Sub-GHz bands (LoRa, Sigfox, remote controls) follow an ITU Region 3 layout of their own. The European 868 MHz and North American 915 MHz plans have no direct equivalent in Thailand. Any sub-GHz band declaration must be checked against the NBTC table, not against an ETSI or FCC dossier.

Thai labelling and NBTC number

Thai labelling combines two requirements: placement of the NBTC number and presence of Thai-language regulatory information for what is aimed at the end user.

NBTC number

The NBTC registration number issued after type approval must appear on the product label, in an area visible without disassembly. This obligation is analogous to the FCC ID in the United States or the KC number in Korea. The absence of the NBTC number on the physical marking is a cause for customs blockage, even if the product is registered in the NBTC register: the customs agent can cross-check the label with the declared file.

Thai text

End-user information must include a Thai version where the regulation requires it:

warnings and safety instructions on the product and in the manual,
commercial name and description on the packaging for retail sale,
electrical specifications on the rating plate for categories where safety requires it,
user manual shipped with the consumer product.

Bilingual Thai plus English is the usual practice. English-only labelling is tolerated on some B2B technical products but remains exposed in consumer market surveillance. For categories that touch consumer safety, Thai is strictly required.

Position and permanence

As with most regulatory markings, the NBTC number and the Thai text must be permanent (resistant through the product lifecycle), legible without a magnifier, and accessible without disassembly. A printed label that fades on first cleaning is regarded as non-compliant.

Thai local representative

Access to the NBTC scheme requires a Thai-resident actor as the holder of the dossier.

Roles

file the type approval dossier with the designated certification body and NBTC,
keep and maintain the register of certifications and their renewals where applicable,
act as the regulatory point of contact sought by NBTC or by customs in case of further request,
manage labelling and the physical conformity of imported products,
interface with operators where network acceptance is required (cellular).

Possible profiles

official Thai distributor, where one exists and accepts the regulatory burden,
Thai subsidiary of the manufacturer, where legally constituted,
NBTC homologation agent, frequent for foreign manufacturers without direct commercial presence.

The representative carries continuous responsibility. Any product modification (radio firmware, chipset, antenna) may invalidate the type approval and require a dossier update, filed by the representative.

Carrier acceptance: AIS and the True / dtac merger

NBTC type approval certifies the product itself. For a cellular module or terminal meant to connect to Thai networks, a carrier acceptance layer applies in practice, distinct from NBTC.

Operator landscape after 2023

The Thai cellular market historically counted three main operators: AIS, True Corporation and dtac (Total Access Communication). The merger between True and dtac, announced in 2022 and completed in 2023, has reduced this landscape to two actors:

Operator	Status	Main commercial brand
AIS (Advanced Info Service)	Independent, historical market-share leader	AIS
TrueMove H (formed from True + dtac merger)	Merged entity since 2023	TrueMove H, dtac brand retained on some segments

Implications for carrier certification

Carrier cellular acceptance remains an internal procedure, distinct from NBTC. The merger has practical implications:

the legacy True and dtac procedures coexist during transition. A manufacturer that obtained a dtac acceptance before 2023 should check equivalence in the merged perimeter.
technical requirements converge progressively towards a unified test plan, but differences may remain on some bands and some features (VoLTE, VoNR, specific carrier aggregation).
the number of operator interlocutors decreases: two instead of three, which in principle simplifies steering but concentrates risk on two relationships.

Carrier acceptance is typically required for terminals meant to be sold with a subscription, or for modules certified under an operator platform. A white-label cellular IoT module can do without it, provided NBTC is obtained. In the post-merger market, a manufacturer that obtained dtac acceptance pre-2023 should confirm with the merged entity that the legacy certificate is still recognised on the unified network plan, and identify which of the merged technical interfaces remains the reference for new submissions.

NBTC compared with RED and FCC

Criterion	RED (EU)	FCC (US)	NBTC (Thailand)
Type of authority	Directive framework, Member State control	Independent federal agency	Independent commission (NBTC Act 2010)
Radio procedure	Self-declaration on harmonised ETSI standards	TCB type approval, FCC ID	A to D classification, type approval for B / C / D by designated certification body
Product identifier	Notified body number where applicable	FCC ID	NBTC registration number
Label language	Language of the Member State of placement	English	Thai (bilingual Thai / English in practice)
Local representative	EU authorised representative if manufacturer outside EU	FCC agent	Thai-resident representative, mandatory
Frequency plans	Harmonised at EU level, ECC decisions	FCC Part 15 and following	NBTC table, aligned with ITU Region 3 with national decisions
Carrier acceptance	Distinct, operator-driven (Deutsche Telekom, etc.)	Distinct carrier acceptance (AT&T, Verizon, etc.)	AIS plus TrueMove H after 2022 / 2023 merger

The table makes the Thai specificity visible: an explicit four-class sorting that modulates the procedure (declarative vs test-based), a local representative obligation stricter than under the EU regime, and a band plan of its own aligned with ITU Region 3 rather than with European or US decisions. For the EU / US comparison itself, see RED and FCC.

Step-by-step procedure for a consumer radio product

The typical sequence for a European manufacturer entering Thailand for the first time.

Freeze the specifications of the product (hardware, radio firmware, antenna, accessories) and identify the intentional radio technologies.
Identify the presumed NBTC class (A, B, C or D) on the basis of the product datasheet and the Thai allocation table. In doubt, aim at the higher class to avoid reclassification during review.
Designate a Thai local representative under written contract. Without a representative, the filing is not accepted.
Choose a designated certification body approved by NBTC for the product category.
Prepare the radio test reports: reuse ETSI or FCC reports as far as possible, complete for Thailand-specific bands (5 GHz / 6 GHz, sub-GHz, 5G n40 / n41 / n79).
Check the regulatory domain table embedded in the product: a TH entry must be present, correctly parameterised for the bands open in Thailand.
File the dossier through the local representative on the NBTC portal, via the designated certification body.
Receive the NBTC number after validation, integrate it into the label design.
Design the final label: NBTC number visible, required Thai text, bilingual Thai / English.
Carrier acceptance where applicable (consumer cellular), in parallel with or after NBTC.
First shipment: customs control on entry, verification of the NBTC number on the product.
Maintenance: monitor product modifications, update the dossier in case of hardware or radio firmware change.

For cross-cutting orders of magnitude per phase, see certification timeline.

Frequent pitfalls

Pitfall	Consequence
Claiming Class A for a product that falls into B or C	Reclassification during review, rejected dossier, full rework with tests
Reusing an ETSI or FCC dossier without checking the NBTC table	Unauthorised 5 GHz / 6 GHz Wi-Fi channels, type approval refused
Forgetting the NBTC number on the physical label	Customs blockage even with valid registration
English-only labelling on a consumer product	Withdrawal in market surveillance, packaging rework
Launching carrier acceptance on the pre-2023 True or dtac org chart	Obsolete interfaces, procedure redirected to TrueMove H, delay
Designating the local representative too late	Filing impossible, industrialisation delay at first shipment
Ignoring 5G n40 and n41 bands in the cellular module design	Degraded mid-band coverage in Thailand, underperforming terminal
Outsourcing Thai translation to an automatic tool without review	Imprecise safety information, consumer-litigation exposure

Going further

RED: EU radio regime, structurally comparable to NBTC type approval for Classes B to D
FCC: US regime, whose radio reports can serve as a partial basis for NBTC
PTCRB: cellular homologation, applicable in parallel for modules destined to Thai operators
Certification timeline: cross-cutting orders of magnitude per phase
Glossary: definitions of NBTC, type approval, SDoC, ITU Region 3, carrier acceptance