Call Center Service Support 09/04/2026

What is the 1900/1800 hotline prefix service of a virtual switchboard? Benefits you may not know about these two number prefixes.

The 1900 and 1800 hotline prefix services are becoming increasingly popular among businesses in sectors such as banking, insurance, restaurants, hotels, beauty clinics, and more. Both prefixes are licensed by the Ministry of Information and Communications and can only receive incoming calls — outgoing calls are not permitted. Below, OMICall will help you better understand the benefits of these two number prefixes.

What is the 1900 hotline prefix service?

The 1900 hotline prefix service is an information number service provided by virtual switchboards. Businesses register and use it to carry out tasks such as:

  • Customer care and interaction
  • Running voting campaigns in the entertainment industry
  • Online buying and selling

Additionally, the 1900 prefix can also be used for internal communication between departments within a business, enabling fast and convenient contact. However, the 1900 prefix only allows incoming calls from customers.

Benefits of the 1900 hotline prefix service for customers / callers:

The 1900 prefix is easy for customers to remember, and they can call from anywhere, at any time they need assistance. Call costs are determined by pre-set rates for the prefix, but are significantly cheaper than standard network calls. Customers also don’t need to worry about dialing an area code, making the process faster and more convenient.

Benefits for businesses:

Registering the 1900 prefix helps customers more easily recognize and remember your brand, giving your business a more professional image in the eyes of both customers and partners. It can also serve as a brand identifier, making it easier to promote your business. The service runs on a modern virtual switchboard system, enabling better customer connectivity via the internet and is compatible with smartphones, computers, and tablets — ideal for teams that are frequently on the move. Additionally, businesses that register the 1900 prefix receive a percentage discount from the provider, while also enjoying significantly improved operational efficiency.

What is the 1800 hotline prefix service?

The 1800 prefix is a toll-free hotline service for callers in Vietnam. It is primarily used by businesses for professional customer care and free customer support through a fixed 1800 hotline number, demonstrating a full commitment to serving customers.

Benefits for callers:

Callers pay nothing for the duration of their call. Like the 1900 prefix, 1800 can be called from anywhere in the country, with no need to look up area codes.

Benefits for businesses:

Offering a free-to-call number encourages more customers to reach out for advice and product support, strengthening the relationship between the business and its customers. The 1800 prefix also boosts your company’s professional image, integrates with CRM software on the OMICall virtual switchboard system, and makes brand promotion and service upgrades easier. Notably, businesses do not need to change their number if they relocate.

OMICall is always ready to support you with any questions about smart switchboard services. Please contact us for more details.

VIHAT TECHNOLOGY Co., Ltd

Headquarters: ViHAT Building – 06 Street No. 16 (Him Lam Residential Area) – Hiep Binh Chanh Ward – Thu Duc District – Ho Chi Minh City

Hanoi Branch: Floor 15, LADECO Building, 266 Doi Can, Ba Dinh, Hanoi

Cambodia Branch: Thida Rath #154 St. 33MC, Sangkat Steung Meanchey, Khan Mean Chey, Phnom Penh

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