| Company | Now Known As | Street Address | Customer Contact No. |
|---|---|---|---|
| IDT America, Corp. | 520 Broad Street Newark, NJ 07102 | 973-438-4854 | |
| inContact, Inc., d/b/a UCN, Inc. | 75 West Towne Ridge Parkway Tower 1 Sandy, UT 84070 | 800-826-8028 | |
| Inmark, Inc. dba Preferred Billing | 10161 Park Run Drive Suite 231 Las Vegas, NV 89145 | 952-401-0681 | |
| Inmate Calling Solutions, LLC d/b/a ICSolutions | 2200 Danbury Street San Antonio, TX 78217 | 888-506-8407 | |
| Integrated Path Communications, LLC | 9030 State Route 22 Hillsdale, NY 12529 | 888-224-6958 | |
| Intelibs, Inc. | 1500 Stony Brook Road Stony Brook, NY 11794 | 877-213-2640 | |
| Intelletrace, Inc. | 936 B 7th St #122 Novato, CA 94945 | 800-618-5877 | |
| Intellicall Operator Services, Inc. | 1900 S. Norfolk Street Suite 350 San Mateo, CA 94403 | 855-937-8449 | |
| Intellifiber Networks, LLC | 4005 North Rodney Parham Road Little Rock, AR 72212 | 855-352-2731 | |
| InterGlobe Communications | 4295 Arthur Kill Road Floor 1 Staten Island, NY 10309 | 800-747-8837 | |
| International Telcom LTD. | 200 W. Mercer Street Suite 202 Seattle, WA 98119 | 866-222-1818 | |
| Intrado Communications, LLC | 11808 Miracle Hills Drive Omaha, NE 68135 | 866-905-1725 | |
| Intrado Safety Communications, Inc. | 1601 Dry Creek Drive Longmont, CO 80503 | 720-494-5800 | |
| IPC Network Services Inc. | 3 Second Street 15th Floor Jersey City, NJ 07311 | 888-286-2343 | |
| IRU Networks, LLC | 3030 NW Expressway Suite 200-328 Oklahoma City, OK 73112 | 888-250-2111 | |