| CoID | Company | Type | Status | States Served | 24X7 Phone |
| BLSFE | PAVE Digital Inc - CANCELLED | VoIP Reseller | C | USA - Nation Wide | 650-575-6918 |
| BLSTM | Consolidated Communications of Kansas Company f/k/a Bluestem | ILEC | A | KS | 916-746-3000 |
| BLTC | Ben Lomand Telephone Cooperative Inc. | Co-Op/Rural | ILEC | A | TN | 931-668-1000 |
| BLUE | Blue Valley Tele-Communications Inc | Co-Op/Rural | A | Kansas | 785-799-3311 |
| BLUET | Bluetone Communications LLC | VoIP Reseller | A | USA - Nation Wide | 614-656-1181 |
| BLUIP | BluiP Inc. | VoIP Reseller | A | USA - Nation Wide | 702-690-4400 |
| BMF | Metro FiberNet LLC d/b/a MetroNet | CLEC Facility | A | IN | 877-407-3224 |
| BMGF1 | Bill and Melinda Gates Foundation - CANCELLED | PBX/PS911/Shared Tenant | C | DC | 800-773-7911 |
| BMHVT | Brattleboro Memorial Hospital | PBX/PS911/Shared Tenant | A | VT | 802-257-0341 |
| BMHWV | Boone Memorial Hospital Inc. | PBX/PS911/Shared Tenant | A | WV | 304-369-1230 |
| BMTC | Brindlee Mountain Telephone Company (Otelco) (CANCELLED) | Facility | C | Arab, AL; Morgan City, AL; Union Grove | 256-586-4156 |
| BMWNA | BMW North America, Inc. (Cancelled) | PBX | C | Oxnard, CA | 201-307-3771 |
| BNA | BNA, Inc. (CANCELLED) | PBX/PS911/Shared Tenant | C | VA | 703-341-2222 |
| BNBK1 | Banterra - CANCELLED | PBX | C | IL | 618-993-9891 |
| BNC | BuzNet Communications | VoIP Provider | A | TN | TX | 214-316-8889 |
| BNRBK | Banner Bank dialtone by Verizon - CANCELLED | PBX/PS911/Shared Tenant | C | WA | 800-773-7911 |
| BNTC | Baldwin Nashville Telephone Company Inc | ILEC | A | IA | 563-673-6001 |
| BNTVL | Consolidated Communications of Pennsylvania Company (fka Ben | ILEC | A | PA | 916-746-3000 |
| BOA | Bridges Owners Association Inc. - CANCELLED | PBX/PS911/Shared Tenant | C | VT | 802-583-2922 |
| BOAZ | Boaz Media Network Solutions | VoIP Reseller | A | USA - Nationwide | 706-745-6991 |
| BOE01 | The Boeing Company dialtone by ATT/TCG(Cancelled) | VoIP | C | AL,AZ,CA,CO,DE,FL,GA,ID,IL,MD,MO,MN,NJ,OR,OK,PA,TX,UT,VA,WA | 425-373-2977 |
| BOK12 | Byron Community Unit School District 226 - CANCELLED | PBX | C | IL | 815-234-5491 |
| BOND | Bond County ETSB (Cancelled) | PSAP | C | IL - Bond County | 618-664-1911 |
| BOONE | Boone County - CANCELLED | LEC | C | IL | 815-544-2144 |
| BORD | Border to Border Communications Inc. | ILEC | A | TX | 956-936-2000 |
| BOSCH | Robert Bosch LLC(Inactive) | PBX/PS911/Shared Tenant | C | USA | 574-237-2104 |
| BOSU | Trustees of Boston University - CANCELLED | Internet Protocol Relay Provider | C | MA | 617-353-2121 |
| BOWDN | Bowdoin College(Inactive) | PBX/PS911/Shared Tenant | C | Brunswick, ME | 207-725-3314 |
| BOXMA | Town of Boxborough - CANCELLED | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | C | MA | 978-264-1750 |
| BPCC | Bright Pattern | VoIP Reseller VoIP Provider | A | USA - Nationwide | 650-529-4099 |
| 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 |
| 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 | 612-239-3154 |
| 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 |