Type B Messaging Service

The industry’s largest and most versatile message distribution service

Type B Messaging underpins every operational aspect of air transport, from commercial and flight operations to ground support, baggage and cargo handling, passenger services, booking availability and aircraft maintenance.

SITA’s Type B Messaging is a message switching service that forms the backbone of collaboration within the air transport industry.

SITA operates the largest messaging network, directly connecting to over 2,400 members of the air transport community. SITA switches over 25 million messages every day, delivering your messages anywhere in the world in no time.


First of its kind

SITA is leading the development of industry messaging standards. Type B Messaging offers end-to-end management of all message types through a single end-to-end managed service. Type B Messaging is part of SITA's Community Messaging portfolio.

Versatile message conversion

SITA’s Type B Messaging enables your messages to be exchanged automatically between Type B and other messaging domains such as Type X, SMTP, Telex, fax or X.400.

Flexible delivery method

SITA’s Type B Messaging offers access via IP, either a private SITA IP network connection or an internet connection. Type B Messaging also offers flexible addressing and routing options and assured delivery using serial numbering or end-to-end protocols.


SITA Type B Messaging Service provides the following benefits.

  • Security
  • Reliability
  • Performance
  • Cost-effectiveness
  • Flexibility


SITA Type B Messaging Service includes the following features.

Message security

  • Accepts, stores, routes and delivers messages via the SITA Type B network and beyond
  • Resilience and performance are built into the system

A gateway to other messaging environments

One connection to Type B Messaging Service over SITA's global network allows you to communicate with:

  • Any other Type B Messaging user
  • Users of SITATEX
  • Users of the most popular e-mail systems connected to SITA's Global Messaging Services via Simple Mail Transfer Protocol (SMTP) or X.400
  • SITA airline applications and services
  • SITA's cargo community
  • Open trading services including the ASC X12 - SPEC2000 Conversion Service
  • Users on other private and public networks including AFTN and ARINC
  • Public Internet e-mail users
  • Fax and Telex users

SITA Global Services (SGS)

SITA Type B Messaging is supported by SITA Global Services (SGS) which provides you with global business continuity through a flexible service model. Our monitoring service ensures your IT systems are reliable and available, around the clock, around the world.

Our experts proactively monitor your infrastructure, identifying and resolving problems often before they impact your services. SGS command centers and field services specialize in managing high availability airport IT systems. SGS field engineers are on-site and available to ensure your IT systems minimize downtime and remain fully updated.