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| Company Name | Contact Address | Phone |
| Infinera Corporation | Leigh Wade 169 W Java Drive Sunnyvale California 94089 | |
| Innovative Systems | Howard Fuller 1000 Innovative Drive Mitchell South Dakota 57301 | 605-995-6120 |
| Interstate Telecom Consulting | Belinda Stark 130 Birch Ave. W Hector Minnesota 55342 | 320-848-6641 |
| ISPN | Charlie Brenneman 14303 W 95th Street Lenexa Kansas 66215 | 913-859-9500 |