| CoID | Company | Type | Status | States Served | 24X7 Phone |
| ICONT | ICON Technologies Inc. | Other (must identify below) | Fixed Wireless Broadband | A | PA | 570-257-4200 |
| ICS | Icon Communication Services - CANCELLED | VoIP Reseller | C | USA - Nationwide | FL | 727-266-2275 |
| ICS12 | Integrated Communication Solutions Inc. - CANCELLED | VoIP Provider | C | AL | FL | GA | MS | TN | 205-423-6940 |
| ICSTE | ICS Communiactions - CANCELLED | VoIP Provider | C | OH | 614-325-9119 |
| ICTC | Consolidated Communications of Illinois Company LLC f/k/a I | CLEC Facility CLEC Reseller ILEC VoIP Provider | A | USA - Nationwide | 916-746-3000 |
| ICTND | Inter-Community Telephone Co. | ILEC | A | ND | 701-475-1300 |
| ID10T | BearCom | Wireless/Cellular/PCS | A | USA - Nationwide | 214-765-7424 |
| IDAC | Bytagig of Idaho LLC | VoIP Provider | A | ID | OR | 986-867-1316 |
| IDACO | American Fiber Systems Inc. - CANCELLED | CLEC Facility | CLEC Reseller | CLEC UNE | C | ID | NV | | 585-785-5837 |
| IDEA1 | Consolidated Communication Enterprise Services (fka IdeaOne) | CLEC Facility CLEC Reseller CLEC UNE VoIP Provider | C | MN | ND | 800-879-2107 |
| IDEAL | Ideal Industries Inc | PBX/PS911/Shared Tenant | A | IL | 815-895-1341 |
| IDRU | IDT America, Corp. (Cancelled) | UNEP | C | CA | 800-889-9126 |
| IDS | IDS Telecom Corp - CANCELLED | CLEC Facility | CLEC Reseller | CLEC UNE | C | FL | 877-433-6662 |
| IDS01 | IDS Long Distance (INACTIVE) | Facility | C | Florida | 800-335-4437 |
| IDTA | IDT America, Corp. (Cancelled) | UNEP Reseller | C | CA,NY,NJ,MA,MD,PA | 800-889-9126 |
| IDTB | IDT America Corp | CLEC Facility | A | USA - Nation Wide | 877-628-9110 |
| IDTC | Dunkerton Telephone Cooperative | ILEC | A | IO | 319-822-4512 |
| IDTD | IDT Corporation | VoIP Provider | A | USA - Nation Wide | 973-438-4662 |
| IDTE | IDT Corporation | VoIP Provider | A | USA - Nation Wide | 973-438-4662 |
| IDTF | IDT Corporation | VoIP Provider | A | USA - Nation Wide | 973-438-4662 |
| IDXNE | IDX System Corp (CANCELLED) | Faciltiy | C | VT, MA | 617-424-6800 |
| IECCW | Wabash Valley College - CANCELLED | PBX | C | CAMPUS | 618-262-8641 |
| IES | Independent Emergency Services | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | MN | 800-909-8148 |
| IEV | IEvolve Inc. | VoIP Provider | A | USA - Nationwide | 716-505-8324 |
| IEY | I-55 Telecommunications, LLC (CANCELLED) | Facility | C | LA | 504-525-1170 |
| IGLOB | PSComm 360 Inc. iGlobal - CANCELLED | CLEC Facility CLEC Reseller PBX/PS911/Shared Tenant VoIP Reseller VoIP Provider | C | USA - Nationwide | 917-781-8500 |
| IHS | Inova Health System | ILEC | A | VA | 800-773-7911 |
| IHS01 | Infotech Houston Solutions LLC | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) Database Management System Provider PBX/PS911/Shared Tenant VoIP Provider | A | USA - Nationwide | 281-909-1020 |
| IIC | Instanet - CANCELLED | VoIP Reseller | C | USA - Nationwide | 818 415-5000 |
| ILANG | Illinois Army National Guard - DOIM - CANCELLED | VoIP Provider Other - (must identify below) | needed for E911 service with Intrado | C | IL | 217-761-1707 |
| ILCC | Illinois Cancer Care - CANCELLED | ILEC | C | IL | 309-231-5551 |
| ILCOL | Illinois College | Cable Digital | A | USA - Nationwide | 217-245-3192 |
| ILOGX | IronLogix LLC | VoIP Reseller | A | USA - Nationwide | 803-454-6255 |
| ILOKA | Iloka Inc. d/b/a Microtech-tel - CANCELLED | CLEC Facility | CLEC Reseller | CLEC UNE | VoIP | C | USA | 800-722-5115 |
| ILOOP | Interloop, Inc. (Cancelled) | Facility | C | FL | 305-623-7404 |
| IMA | Inter Mountain Cable Inc. | Cable Digital | CLEC Facility | A | KY | VA | 606-478-2500 |
| IMCT | insideMyCity LLC dba insideMyCity Telec - CANCELLED | VoIP Provider | C | TX | 877-472-9302 |
| IMD | Intermetro Communications Inc. | CLEC Reseller Internet Protocol Relay Provider PBX/PS911/Shared Tenant Wireless/Cellular/PCS VoIP Reseller VoIP Provider | A | USA - Nationwide | 866-446-2662 |
| IMED | Intermedia.net Inc. - CANCELLED | VoIP Reseller | C | VoIP Reseller | 206-654-1030 |
| IMF | International Monetary Fund - CANCELLED | PBX/PS911/Shared Tenant | C | DC | 800-773-7911 |
| IMGN | ImmunoGen Inc. - CANCELLED | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) PBX/PS911/Shared Tenant | C | MA | 781-895-0600 |
| IMM | Integra Telecom of Minnesota, Inc. (Cancelled) | Facility | C | MN | 612-226-5611 |
| IMMIX | Limitless Mobile LLC | Wireless/Cellular/PCS | A | PA | 866-550-3302 |
| IMON | ImOn Communications LLC | CLEC Facility | A | IA | 319-261-2673 |
| IMPER | Imperio Networks LLC - CANCELLED | CLEC Facility | C | TX | 866-482-9088 |
| IMPG | Imperial Technologies Inc | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) Cable Digital CLEC Reseller PBX/PS911/Shared Tenant Wireless/Cellular/PCS VoIP Reseller VoIP Provid | A | USA - Nationwide | 800-660-2639 |
| IMPLS | Impulse Advanced Communications | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | USA - Nationwide California | 805-456-5800 |
| INC | Interactive Networks Corporation | CLEC Facility | CLEC UNE | A | Silver City | NM | 575-313-9162 |
| INC88 | Intelligent Network Communications Inc. - CANCELLED | VoIP Reseller VoIP Provider | C | USA-Nation Wide MS | 800-421-9024 |
| INCOM | InCom - CANCELLED | CLEC Facility CLEC Reseller CLEC UNE ILEC VoIP Provider | C | ID | 208-229-9000 |