Public regulatory phone
(888) 575-6398
Associations below come from public FCC regulatory records. Confidence describes the source relationship, not current ownership of the number.
| Company or contact | FRN | System | Source record | Confidence | Observed |
|---|---|---|---|---|---|
| XO Oregon, Inc customer_inquiries | 0004338018 | FORM499 | 820888 | Authoritative identifier (100.0%) | 2026-08-01 03:48:06 |
| XO Texas, Inc. customer_inquiries | 0004338182 | FORM499 | 820148 | Authoritative identifier (100.0%) | 2026-08-01 02:48:06 |
| XO Massachusetts, Inc. customer_inquiries | 0004339263 | FORM499 | 819960 | Authoritative identifier (100.0%) | 2026-08-01 02:48:05 |
| XO Missouri, Inc. customer_inquiries | 0004338216 | FORM499 | 819294 | Authoritative identifier (100.0%) | 2026-08-01 01:48:06 |
| XO Missouri, Inc. customer_inquiries | 0004338216 | FORM499 | 819192 | Authoritative identifier (100.0%) | 2026-08-01 01:48:06 |
| XO Arizona, Inc. customer_inquiries | 0004372082 | FORM499 | 818764 | Authoritative identifier (100.0%) | 2026-08-01 01:48:05 |
| XO Idaho, Inc. customer_inquiries | 0004338042 | FORM499 | 818760 | Authoritative identifier (100.0%) | 2026-08-01 01:48:05 |
| XO New Mexico, Inc. customer_inquiries | 0004372124 | FORM499 | 818758 | Authoritative identifier (100.0%) | 2026-08-01 01:48:05 |
| XO Michigan, Inc. customer_inquiries | 0004339578 | FORM499 | 818736 | Authoritative identifier (100.0%) | 2026-08-01 01:48:05 |
| XO West Virginia, Inc. customer_inquiries | 0004340246 | FORM499 | 818662 | Authoritative identifier (100.0%) | 2026-07-31 23:48:06 |
| XO Pennsylvania, Inc. customer_inquiries | 0004339905 | FORM499 | 818660 | Authoritative identifier (100.0%) | 2026-07-31 23:48:06 |
| XO Virginia, LLC customer_inquiries | 0004339347 | FORM499 | 818664 | Authoritative identifier (100.0%) | 2026-07-31 23:48:06 |
| XO Georgia, Inc. customer_inquiries | 0004338158 | FORM499 | 818594 | Authoritative identifier (100.0%) | 2026-07-31 23:48:06 |
| XO DC, Inc. customer_inquiries | 0004339313 | FORM499 | 818658 | Authoritative identifier (100.0%) | 2026-07-31 23:48:06 |
| XO New Jersey, Inc. customer_inquiries | 0004339271 | FORM499 | 818038 | Authoritative identifier (100.0%) | 2026-07-31 23:48:05 |
| XO Florida, Inc. customer_inquiries | 0004338117 | FORM499 | 818316 | Authoritative identifier (100.0%) | 2026-07-31 23:48:05 |
| XO New York, Inc. customer_inquiries | 0004339248 | FORM499 | 818002 | Authoritative identifier (100.0%) | 2026-07-31 23:48:05 |
| XO Maryland, LLC customer_inquiries | 0004339321 | FORM499 | 818036 | Authoritative identifier (100.0%) | 2026-07-31 23:48:05 |
| XO Colorado, LLC customer_inquiries | 0004372090 | FORM499 | 818084 | Authoritative identifier (100.0%) | 2026-07-31 23:48:05 |
| XO Utah, Inc. customer_inquiries | 0004372108 | FORM499 | 811843 | Authoritative identifier (100.0%) | 2026-07-31 20:48:04 |
| XO Washington, Inc. customer_inquiries | 0003747953 | FORM499 | 811830 | Authoritative identifier (100.0%) | 2026-07-31 20:48:04 |
| XO Tennessee, Inc. customer_inquiries | 0004338174 | FORM499 | 811839 | Authoritative identifier (100.0%) | 2026-07-31 20:48:04 |
| XO Pennsylvania, Inc. customer_inquiries | 0004339905 | FORM499 | 811836 | Authoritative identifier (100.0%) | 2026-07-31 20:48:04 |
| Telecommunications of Nevada, LLC customer_inquiries | 0003783545 | FORM499 | 811833 | Authoritative identifier (100.0%) | 2026-07-31 20:48:04 |
| XO California, Inc. customer_inquiries | 0004373171 | FORM499 | 811842 | Authoritative identifier (100.0%) | 2026-07-31 20:48:04 |