| AT&T Mobility TRB No. 1 Business |
| AT&T Mobility TRB No. 2 Residential |
| AT&T Mobility TRB No. 3 Access |
| AT&T Mobility TRB No. 4 Intra-Island LD |
| AT&T of PR Tariff No. 2 Business |
| AT&T of PR Tariff No. 1 Residential |
| Blackburn Technologies |
| Caribe Communications, Inc. |
| CCI PR RSA, INC. |
| CenturyLink Comm TRB No. 1 |
| Custom Teleconnect |
| Data @ccess Communications, Inc. |
| Global Tel*Link Corp. Tariff No.1 |
| Granite Telecommunications, LLC |
| Hola Communications, Inc. |
| IDT |
| Inmate Calling Solutions |
| INTELLICALL |
| Intercontinental Comm. |
| Metropolitan Telecommunications PR TRB No. 2 |
| Metropolitan TelecommunicationsPR TRB No. 1 |
| Network Communications International Corp. |
| Network Operator Services |
| Neutral Tandem-Puerto Rico LLC |
| Prepa Networks LLC. |
| Primus Telecommunications, Inc. |
| PRT-LD |
| Puerto Rico Telephone Company Español |
| Puerto Rico Telephone Company Ingles |
| SBC |
| Securus Technologies LLC |
| STSJ |
| TLD Tariff No. 1 |
| TLD Tariff No. 2 |
| TLD Tariff No. 3 |
| TRICOM |
| USLD |
| Verizon Puerto Rico LLC |
| WorldNet |
