Each member is an authorized Concessionaire of the Telecommunications Authority of Trinidad and Tobago (TATT).
| Organisation | ASN | Website |
|---|---|---|
| Telecommunications Services of Trinidad and Tobago (TSTT) | 5639 | www.tstt.co.tt |
| Open Telecom Limited | 11947 | www.opentelecomtt.com |
| Massy Communications Limited | 27924 | www.massycommunications.com |
| Lisa Communications | 26317 | www.lisacommunications.com |
| Green Dot Limited | 27789 | www.gd.tt |
| Digicel Trinidad and Tobago | 27800 | www.digiceltt.com |
| Columbus Communications Trinidad Limited (FLOW) | 27665 | www.discoverflow.co |
| Airlink Communications Ltd | 61478 | www.airlinktt.com |