| CoID | Company | Type | Status | States Served | 24X7 Phone |
| AZTH | Aztech Communications - CANCELLED | CLEC Facility | C | AZ | 928-542-0568 |
| AZUSA | City of Azusa | PBX/PS911/Shared Tenant | A | USA - Nationwide | 626-244-8046 |
| BA812 | Brewster Academy | PBX/PS911/Shared Tenant | A | NH | 603-998-6952 |
| BAA1 | Barr Tell USA Inc. | CLEC Facility | VoIP Provider | A | USA | 917-549-0100 |
| BABO | Babson College | PBX/PS911/Shared Tenant | A | MA | 800-773-7911 |
| BAC1 | Bank of America/Merrill Lynch(Inactive) | ILEC | C | NY | 212-236-8992 |
| BACO | Baltimore County Government - CANCELLED | ILEC | VoIP Proivder | C | MD | 410-887-8200 |
| BACRI | Byrd Institute(Cancelled) | PBX/PS911/Shared Tenant | C | FL | 866-295-9696 |
| BADGE | CBS Telephone and Data | VoIP Provider | A | TX | 210-496-9800 |
| BAH01 | Booz Allen Hamilton - CANCELLED | PBX/PS911/Shared Tenant | C | USA - Nation Wide | 800-773-7911 |
| BAI | Bel Air Internet LLC | VoIP Reseller | A | CA | 818-449-2626 |
| BAKER | Baker and Mckenzie - CANCELLED | VoIP | C | DC | 703-967-4698 |
| BAM | Bell Atlantic Mobile (Cancelled) | Cellular | C | South Central & Western NC; Wetern half of SC; North East co | 908-306-7123 |
| BAND | Bandwidth | CLEC Facility Database Management System Provider Video Relay Service VoIP Provider VPC | A | USA - Nation Wide Virgin Islands | 855-864-7776 |
| BAND2 | Bandwidth | CLEC Facility Database Management System Provider Video Relay Service VoIP Provider VPC | A | USA - Nationwide | Virgin Islands | 866-864-7776 |
| BANDR | Bandwidth | CLEC Facility Database Management System Provider VoIP Provider VPC | A | USA - Nationwide | 866-864-7776 |
| BANTR | Banter Inc | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) VoIP Reseller VoIP Provider | A | USA - Nationwide | 972-845-1500 |
| BARE | Bare Escentuals Inc. - CANCELLED | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | C | CA | 614-489-5778 |
| BARRY | Barry County Telephone Company - CANCELLED | ILEC | C | MI | 269-491-8700 |
| BART | S.F. Bay Area Rapid Transit - CANCELLED | Facility | C | CA | 888-611-0029 |
| BASC | Bascom Mutual Telephone Company | CLEC Facility | A | OH | 419-937-2222 |
| BASD | Boyertown Area School District (CANCELLED) | PBX | C | PA | 610-473-3500 |
| BATES | Bates College - CANCELLED | PBX | C | ME | Lewiston | 207-786-6254 |
| BAU | The Baupost Group LLC | PBX/PS911/Shared Tenant | A | CO | MA | 866-216-8300 |
| BAYLD | Bayland Communications - CANCELLED | CLEC UNE | C | WI | 920-617-7500 |
| BAYPN | C.W. BILL YOUNG V.A. MEDICAL CENTER - CANCELLED | PBX/PS911/Shared Tenet | C | FL | 727-242-3898 |
| BAYRG | FirstLight Fiber | CLEC Facility CLEC Reseller CLEC UNE VoIP Provider | A | ME | MA | NH | 607-387-7155 |
| BAYTL | Bayland Telephone Inc. | ILEC | A | WI | 920-617-7500 |
| BBA | Burr and Burton Academy | PBX/PS911/Shared Tenant | A | VT | 802-440-6645 |
| BBB | Baldwin Broadband LLC - CANCELLED | CLEC Facility | C | WI | 715-688-1090 |
| BBC | Braodband Centric Corp - CANCELLED | VoIP Resller | C | USA | 212-999-4811 |
| BBCP | Bristol Bay Cellular Partnership | Co-Op/Rural Wireless/Cellular/PCS Other (must identify below) | A | AK | 907-246-3403 |
| BBD | Broadband Dynamics LLC | VoIP Provider | A | USA - Nationwide | 602-357-3600 |
| BBEND | Big Bend Telephone & Big Bend Telecom LTD | CLEC Facility ILEC | A | TX | 800-592-4781 |
| BBHTL | Broadband Hospality | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) VoIP Reseller VoIP Provider | A | USA - Nation Wide | 330-629-6717 |
| BBMTC | Butler-Bremer Communications | ILEC | A | IA | 319-276-4458 |
| BBNA | Bloomberg BNA | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | VA | 703-341-3020 |
| BBNS | Buckingham Browne and Nichols School(Inactive) | PBX/PS911/Shared Tenant | C | MA | 617-593-5582 |
| BBO | BroadBand Office Inc. (Cancelled) | Facility, reseller | C | AZ, CA,CO, DC, FL, GA, IL, IN, MA, MI, MN, MO, NC, NY, NJ, O | 888-746-4226 |
| BBTEL | Cloudli Communications Inc. | VoIP Provider | A | USA - Nationwide | 514-879-8522 |
| BBURG | Brandenburg Telecom LLC | Facility | A | KY | 270-422-2121 |
| BBV | Broadband Voice LLC dba Fuse.Cloud | VoIP Reseller | A | USA | 844-926-6000 |
| BBW | Bluebird Wireless - CANCELLED | VoIP | C | US | 318-908-1000 |
| BCA | Business Communication Analysts Inc - CANCELLED | CLEC Facility | CLEC Reseller | VoIP | C | MI | IL | IN | 800-774-5091 |
| BCALL | BryteCall LLC | PBX/PS911/Shared Tenant VoIP Provider | A | USA - Nationwide | 305-809-8999 |
| BCASA | Blue Casa Telephone LLC | CLEC Facility | A | CA | 619-253-8434 |
| BCBSM | Blue Cross Blue Sheild MA - CANCELLED | ILEC PBX/PS911/Shared Tenant | C | MA | 617-246-5000 |
| BCC01 | Bay Creek Communications - CANCELLED | VoIP | C | Cape Charles | VA | 757-331-8700 |
| BCCH | Brigham City Community Hospital | 9-1-1 Admin-CPE ALI (9-1-1 Jurisdiction/PSAP ONLY) | A | UT | 801-299-2468 |
| BCCIT | Collier County BCC | 9-1-1 Admin CPE ALI | A | FL | 239-280-6914 |