What 2APlus do

Virtual Number

1.Thailand-Bangkok DID numbers
2.International Phone numbers
* Forwarding calls
* Answer Calls Anywhere

SIP Trunk Services / Thailand VoIP Calls

  • Premium CLI- with Caller ID
  • Premium CLI- with DID number
  • Standard with Non-CLI
  • Getting an account

     SIP TRUNK for 3CX Customer

Getting an account

You can apply for new account for free by calling our Sales & Marketing Tel. +662 105 5755 or email: After your application has been approved, you will receive an email with your username and password. Once you sign in, you can make a couple of test calls before making a pre-payment.


TwoAPlus accept both prepaid and postpaid service (for customers in Thailand only). You can set up your payment plan and choose either PayPal, credit card or bank transfer.

Getting connected

The GK/Registrar Clients The username & password can be used to connect to our SIP-server in order to make calls. Here are the settings: Username: Your username Password: Your password SIP Server / IP

The Gateway Clients

If you cannot connect by using Username & Password, we can also authenticate your fixed IP address(es).
After we authenticated your IP, you can connect by using the following IP-address:
For SIP: 

We support the following codecs:


SIP Trunk / International VoIP Calls

* Premium Route
* Standard Route 

Head Office

  • Two A Plus Company Limited
  • 72 CAT Telecom Tower
  • 18th Fl. Charoenkrung Rd.
  • Bangrak Bangkok Thailand 10500