| CoID | Company | Type | Status | States Served | 24X7 Phone |
| BPD | Bountiful Police Department | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) PBX/PS911/Shared Tenant | A | UT | 801-298-6000 |
| BPI | BasicPhone, Inc. (Cancelled) | Reseller | C | TX, LA, OK, AR, KS, NV, MS, MO, FL | 888-503-3663 |
| BPL | Boston Public Library - CANCELLED | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | C | MA | 617-859-2207 |
| BPMRG | REGENCY GRAND BPM SENIOR LIVING - CANCELLED | PBX/PS911/Shared Tenant | C | USA - Nationwide | 626-332-3344 |
| BPOND | Bryant Pond Telephone Company (Cancelled) | ILEC | C | ME | 207-336-9911 |
| BPS | Bristol Public Schools | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | CT | 860-378-4779 |
| BPSI | BPSI / Inter.com(Cancelled) | CLEC Facility, VoIP | C | MN | 800-419-0093 |
| BPUSD | Baldwin Park Unified School District | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | CA | 909-609-7001 |
| BR549 | Telogix | VoIP Provider | A | USA - Nationwide | 870-345-7006 |
| BRANU | Brandeis University - CANCELLED | PBX/PS911/Shared Tenant | C | MA | 781-736-5000 |
| BRC | Brethren Retirement Community - CANCELLED | PBX | C | OH | 937-547-8000 |
| BRDGE | The Redcliffe Group LLC | VoIP Provider | A | USA - Nationwide | 470-207-8847 |
| BRDMN | Broadband Corp | VoIP Reseller | A | MN | 952-215-3800 |
| BRECK | Peninsula Fiber Network LLC | CLEC Facility | A | MI | 906-226-2010 |
| BREDA | Breda Telephone Corp. | ILEC | A | IA | 712-673-2311 |
| BREM1 | City of Bremerton | PBX/PS911/Shared Tenant | A | WA | 360-473-5475 |
| BREN | City of Brenham - CANCELLED | PBX/PS911/Shared Tenant | C | TX | 979-337-7400 |
| BREOV | Bresnan Digital Services LLC(Cancelled) | Cable Digital, CLEC Facility, CLEC Reseller | C | CO, MT, UT, WY | 406-869-5665 |
| BRESN | Bresnan Digital Services - CANCELLED | Cable Digital | CLEC Facility | CLEC Reseller | C | MT | WY | CO | UT | 406-869-5665 |
| BRETH | Brethren Village - CANCELLED | PBX/PS911/Shared Tenant | C | Lancaster | PA | 717-569-2657 |
| BRFR | Beresford Municipal Telephone Co. | ILEC | A | SD | 605-763-2500 |
| BRG | Baraga Telephone Company | ILEC | A | MI | 906-334-2600 |
| BRGA | Baraga Telephone Company | CLEC Facility | A | MI | 906-334-2600 |
| BRGC | Brett Robinson | PBX/PS911/Shared Tenant | A | AL | 251-215-7368 |
| BRGN | Bergen Telephone Company | ILEC | A | IL | WI | 262-736-9981 |
| BRID1 | Bridge Communications LLC. | VoIP Provider | A | USA - Nationwide | 678-845-7600 |
| BRIDG | Bridgecom International, Inc. (INACTIVE) | Facility | C | NY | 800-427-9114 |
| BRISD | Branch Intermediate School District | PBX/PS911/Shared Tenant | A | MI | 517-206-1819 |
| BRKL | Brookline Bancorp Inc | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | MA | 508-400-0842 |
| BRNCY | Barnes City Cooperative Telephone Company | ILEC | A | IA | 641-990-1938 |
| BROOK | Brooklyn Mutual Telecommunications Coop | Co-Op/Rural ILEC PBX/PS911/Shared Tenant Wireless/Cellular/PCS | A | IA | 877-610-0330 |
| BRP | Reinhart Food Service Black River Produce | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | USA - Nationwide | 847-430-9714 |
| BRPC | Crown Point Network Technologies Inc. dba Bridge Point Comm | CLEC Facility; CLEC Reseller; CLEC UNE | A | NY | 518-597-3300 |
| BRST | BroadStreet Communications, Inc. (Out of Business) | Facility | C | PA, MD, DC, VA, SC, NC, FL, TN, AL, GA | 877-638-2861 |
| BRT | Big River Telephone Company LLC | CLEC Facility | A | MO | IL | KY | AR | KS | MN | OK | TX | MS | TN | PA | NJ | NM | CO | 800-455-1201 |
| BRTC | Ballard Rural Telephone Coop. Corp. Inc. | ILEC | A | KY | 270-832-0193 |
| BRTEL | Blue Rooster Telecom Inc. - CANCELLED | CLEC Facility | VoIP Provider | C | CA | 888-543-8701 |
| BRTRT | Brattleboro Retreat | PBX/PS911/Shared Tenant | A | VT | 800-738-7328 |
| BRUCE | Bruce Telephone Company | Facility | A | WI | 715-868-5111 |
| BRUIN | Holyoke Community College | 9-1-1 Admin-CPE ALI | A | MA | 413-552-2155 |
| BRUNS | Brunswick School Department | PBX/PS911/Shared Tenant | A | ME | 207-319-1900 |
| BRVAL | Valley Telephone Co. | Facility | A | MN | SD | 218-826-6161 |
| BRVR | BroadRiver Communications Company (CANCELLED) | Facility | C | GA, FL, TN | 678-878-1778 |
| BRYAN | City of Bryan - Bryan Municipal Utilities | PBX/PS911/Shared Tenant | A | OH | 800-773-7911 |
| BRZCO | Brazos County | PBX/PS911/Shared Tenant | A | TX | 979-446-6917 |
| BRZO | Brazos Telecommunications, Inc. (CANCELLED) | | C | Young County, Archer County TX | 940-564-5659 |
| BRZS | Brazos Cellular Communications, Ltd. (INACTIVE) | Facility | C | TX | 940-564-3531 |
| BRZZ | Brazos Telephone Co-op. Inc. (CANCELLED) | ILEC | C | TX | 940-564-5659 |
| BS403 | BETHEL SCHOOL DISTRICT 403 | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) PBX/PS911/Shared Tenant | A | WA | 253-405-0395 |
| BSCC | BellSouth Cellular Corp. (Cancelled - See CING) | Cellular | C | FL, GA, AL, MS, LA, NC, SC, TX, CA, HI | 404-249-0365 |