Public regulatory phone
(415) 901-3816
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 Texas, Inc. service_agent | 0004338182 | FORM499 | 820148:625291 | High confidence (95.0%) | 2026-08-11 01:48:50 |
| XO Massachusetts, Inc. service_agent | 0004339263 | FORM499 | 819960:624938 | High confidence (95.0%) | 2026-08-11 01:18:50 |
| XO Missouri, Inc. service_agent | 0004338216 | FORM499 | 819192:624159 | High confidence (95.0%) | 2026-08-11 00:48:48 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 818660:623738 | High confidence (95.0%) | 2026-08-10 23:48:49 |
| XO Georgia, Inc. service_agent | 0004338158 | FORM499 | 818594:623684 | High confidence (95.0%) | 2026-08-10 23:48:49 |
| XO Michigan, Inc. service_agent | 0004339578 | FORM499 | 818736:623796 | High confidence (95.0%) | 2026-08-10 23:48:49 |
| XO Arizona, Inc. service_agent | 0004372082 | FORM499 | 818764:623817 | High confidence (95.0%) | 2026-08-10 23:48:49 |
| XO DC, Inc. service_agent | 0004339313 | FORM499 | 818658:623734 | High confidence (95.0%) | 2026-08-10 23:48:49 |
| XO Idaho, Inc. service_agent | 0004338042 | FORM499 | 818760:623813 | High confidence (95.0%) | 2026-08-10 23:48:49 |
| XO Maryland, LLC service_agent | 0004339321 | FORM499 | 818036:623279 | High confidence (95.0%) | 2026-08-10 23:18:49 |
| XO Colorado, LLC service_agent | 0004372090 | FORM499 | 818084:623317 | High confidence (95.0%) | 2026-08-10 23:18:49 |
| XO New Jersey, Inc. service_agent | 0004339271 | FORM499 | 818038:623283 | High confidence (95.0%) | 2026-08-10 23:18:49 |
| XO Florida, Inc. service_agent | 0004338117 | FORM499 | 818316:623466 | High confidence (95.0%) | 2026-08-10 23:18:49 |
| XO New York, Inc. service_agent | 0004339248 | FORM499 | 818002:623243 | High confidence (95.0%) | 2026-08-10 23:18:49 |
| XO Illinois, Inc. service_agent | 0004339693 | FORM499 | 817402:622895 | High confidence (95.0%) | 2026-08-10 21:48:49 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 811836:620505 | High confidence (95.0%) | 2026-08-10 17:48:49 |
| XO Ohio, Inc. service_agent | 0004339719 | FORM499 | 811845:620521 | High confidence (95.0%) | 2026-08-10 17:48:49 |
| XO Washington, Inc. service_agent | 0003747953 | FORM499 | 811830:620500 | High confidence (95.0%) | 2026-08-10 17:48:49 |
| XO California, Inc. service_agent | 0004373171 | FORM499 | 811842:620513 | High confidence (95.0%) | 2026-08-10 17:48:49 |
| XO Tennessee, Inc. service_agent | 0004338174 | FORM499 | 811839:620509 | High confidence (95.0%) | 2026-08-10 17:48:49 |
| XO Utah, Inc. service_agent | 0004372108 | FORM499 | 811843:620517 | High confidence (95.0%) | 2026-08-10 17:48:49 |
| XO Missouri, Inc. service_agent | 0004338216 | FORM499 | 819192:512865 | High confidence (95.0%) | 2026-08-09 01:48:42 |
| XO Idaho, Inc. service_agent | 0004338042 | FORM499 | 818760:512519 | High confidence (95.0%) | 2026-08-09 00:48:40 |
| XO Arizona, Inc. service_agent | 0004372082 | FORM499 | 818764:512523 | High confidence (95.0%) | 2026-08-09 00:48:40 |
| XO Michigan, Inc. service_agent | 0004339578 | FORM499 | 818736:512502 | High confidence (95.0%) | 2026-08-09 00:48:40 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 818660:512444 | High confidence (95.0%) | 2026-08-09 00:48:40 |
| XO Georgia, Inc. service_agent | 0004338158 | FORM499 | 818594:512390 | High confidence (95.0%) | 2026-08-09 00:48:39 |
| XO DC, Inc. service_agent | 0004339313 | FORM499 | 818658:512440 | High confidence (95.0%) | 2026-08-09 00:48:39 |
| XO Maryland, LLC service_agent | 0004339321 | FORM499 | 818036:511985 | High confidence (95.0%) | 2026-08-08 23:48:40 |
| XO New Jersey, Inc. service_agent | 0004339271 | FORM499 | 818038:511989 | High confidence (95.0%) | 2026-08-08 23:48:40 |
| XO Florida, Inc. service_agent | 0004338117 | FORM499 | 818316:512172 | High confidence (95.0%) | 2026-08-08 23:48:40 |
| XO Colorado, LLC service_agent | 0004372090 | FORM499 | 818084:512023 | High confidence (95.0%) | 2026-08-08 23:48:40 |
| XO New York, Inc. service_agent | 0004339248 | FORM499 | 818002:511949 | High confidence (95.0%) | 2026-08-08 23:48:40 |
| XO Illinois, Inc. service_agent | 0004339693 | FORM499 | 817402:511601 | High confidence (95.0%) | 2026-08-08 23:18:40 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 811836:509211 | High confidence (95.0%) | 2026-08-08 15:18:39 |
| XO California, Inc. service_agent | 0004373171 | FORM499 | 811842:509219 | High confidence (95.0%) | 2026-08-08 15:18:39 |
| XO Utah, Inc. service_agent | 0004372108 | FORM499 | 811843:509223 | High confidence (95.0%) | 2026-08-08 15:18:39 |
| XO Washington, Inc. service_agent | 0003747953 | FORM499 | 811830:509206 | High confidence (95.0%) | 2026-08-08 15:18:39 |
| XO Tennessee, Inc. service_agent | 0004338174 | FORM499 | 811839:509215 | High confidence (95.0%) | 2026-08-08 15:18:39 |
| XO Ohio, Inc. service_agent | 0004339719 | FORM499 | 811845:509227 | High confidence (95.0%) | 2026-08-08 15:18:39 |
| XO Communications Services, LLC service_agent | 0006275945 | FORM499 | 822284:461447 | High confidence (95.0%) | 2026-08-07 08:18:33 |
| XO Minnesota, LLC service_agent | 0004977393 | FORM499 | 821114:459880 | High confidence (95.0%) | 2026-08-07 03:18:31 |
| XO Oregon, Inc service_agent | 0004338018 | FORM499 | 820888:459555 | High confidence (95.0%) | 2026-08-07 02:48:33 |
| XO Texas, Inc. service_agent | 0004338182 | FORM499 | 820148:458350 | High confidence (95.0%) | 2026-08-07 01:48:32 |
| XO Massachusetts, Inc. service_agent | 0004339263 | FORM499 | 819960:457997 | High confidence (95.0%) | 2026-08-07 01:18:31 |
| XO Missouri, Inc. service_agent | 0004338216 | FORM499 | 819192:457218 | High confidence (95.0%) | 2026-08-07 00:18:31 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 818660:456797 | High confidence (95.0%) | 2026-08-06 23:48:31 |
| XO Michigan, Inc. service_agent | 0004339578 | FORM499 | 818736:456855 | High confidence (95.0%) | 2026-08-06 23:48:31 |
| XO DC, Inc. service_agent | 0004339313 | FORM499 | 818658:456793 | High confidence (95.0%) | 2026-08-06 23:48:31 |
| XO Idaho, Inc. service_agent | 0004338042 | FORM499 | 818760:456872 | High confidence (95.0%) | 2026-08-06 23:48:31 |
| XO Arizona, Inc. service_agent | 0004372082 | FORM499 | 818764:456876 | High confidence (95.0%) | 2026-08-06 23:48:31 |
| XO Georgia, Inc. service_agent | 0004338158 | FORM499 | 818594:456743 | High confidence (95.0%) | 2026-08-06 23:48:30 |
| XO Florida, Inc. service_agent | 0004338117 | FORM499 | 818316:456525 | High confidence (95.0%) | 2026-08-06 22:48:33 |
| XO New York, Inc. service_agent | 0004339248 | FORM499 | 818002:456302 | High confidence (95.0%) | 2026-08-06 22:48:32 |
| XO New Jersey, Inc. service_agent | 0004339271 | FORM499 | 818038:456342 | High confidence (95.0%) | 2026-08-06 22:48:32 |
| XO Maryland, LLC service_agent | 0004339321 | FORM499 | 818036:456338 | High confidence (95.0%) | 2026-08-06 22:48:32 |
| XO Colorado, LLC service_agent | 0004372090 | FORM499 | 818084:456376 | High confidence (95.0%) | 2026-08-06 22:48:32 |
| XO Illinois, Inc. service_agent | 0004339693 | FORM499 | 817402:455954 | High confidence (95.0%) | 2026-08-06 19:18:30 |
| XO Ohio, Inc. service_agent | 0004339719 | FORM499 | 811845:453580 | High confidence (95.0%) | 2026-08-06 16:18:31 |
| XO California, Inc. service_agent | 0004373171 | FORM499 | 811842:453572 | High confidence (95.0%) | 2026-08-06 16:18:31 |
| XO Utah, Inc. service_agent | 0004372108 | FORM499 | 811843:453576 | High confidence (95.0%) | 2026-08-06 16:18:31 |
| XO Tennessee, Inc. service_agent | 0004338174 | FORM499 | 811839:453568 | High confidence (95.0%) | 2026-08-06 16:18:31 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 811836:453564 | High confidence (95.0%) | 2026-08-06 16:18:31 |
| XO Washington, Inc. service_agent | 0003747953 | FORM499 | 811830:453559 | High confidence (95.0%) | 2026-08-06 16:18:31 |
| XO Communications Services, LLC service_agent | 0006275945 | FORM499 | 822284:405800 | High confidence (95.0%) | 2026-08-05 23:18:27 |
| XO Minnesota, LLC service_agent | 0004977393 | FORM499 | 821114:404233 | High confidence (95.0%) | 2026-08-05 20:48:26 |
| XO Oregon, Inc service_agent | 0004338018 | FORM499 | 820888:403908 | High confidence (95.0%) | 2026-08-05 19:48:26 |
| XO Texas, Inc. service_agent | 0004338182 | FORM499 | 820148:402703 | High confidence (95.0%) | 2026-08-05 18:48:26 |
| XO Massachusetts, Inc. service_agent | 0004339263 | FORM499 | 819960:402350 | High confidence (95.0%) | 2026-08-05 18:18:26 |
| XO Missouri, Inc. service_agent | 0004338216 | FORM499 | 819192:401571 | High confidence (95.0%) | 2026-08-05 17:48:25 |
| XO DC, Inc. service_agent | 0004339313 | FORM499 | 818658:401146 | High confidence (95.0%) | 2026-08-05 17:18:25 |
| XO Idaho, Inc. service_agent | 0004338042 | FORM499 | 818760:401225 | High confidence (95.0%) | 2026-08-05 17:18:25 |
| XO Michigan, Inc. service_agent | 0004339578 | FORM499 | 818736:401208 | High confidence (95.0%) | 2026-08-05 17:18:25 |
| XO Arizona, Inc. service_agent | 0004372082 | FORM499 | 818764:401229 | High confidence (95.0%) | 2026-08-05 17:18:25 |
| XO Georgia, Inc. service_agent | 0004338158 | FORM499 | 818594:401096 | High confidence (95.0%) | 2026-08-05 17:18:25 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 818660:401150 | High confidence (95.0%) | 2026-08-05 17:18:25 |
| XO Florida, Inc. service_agent | 0004338117 | FORM499 | 818316:400878 | High confidence (95.0%) | 2026-08-05 15:48:25 |
| XO Maryland, LLC service_agent | 0004339321 | FORM499 | 818036:400691 | High confidence (95.0%) | 2026-08-05 15:48:24 |
| XO Colorado, LLC service_agent | 0004372090 | FORM499 | 818084:400729 | High confidence (95.0%) | 2026-08-05 15:48:24 |
| XO New Jersey, Inc. service_agent | 0004339271 | FORM499 | 818038:400695 | High confidence (95.0%) | 2026-08-05 15:48:24 |
| XO New York, Inc. service_agent | 0004339248 | FORM499 | 818002:400655 | High confidence (95.0%) | 2026-08-05 15:48:24 |
| XO Illinois, Inc. service_agent | 0004339693 | FORM499 | 817402:400307 | High confidence (95.0%) | 2026-08-05 15:18:26 |
| XO California, Inc. service_agent | 0004373171 | FORM499 | 811842:397925 | High confidence (95.0%) | 2026-08-05 12:18:25 |
| XO Washington, Inc. service_agent | 0003747953 | FORM499 | 811830:397912 | High confidence (95.0%) | 2026-08-05 12:18:25 |
| XO Ohio, Inc. service_agent | 0004339719 | FORM499 | 811845:397933 | High confidence (95.0%) | 2026-08-05 12:18:25 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 811836:397917 | High confidence (95.0%) | 2026-08-05 12:18:25 |
| XO Utah, Inc. service_agent | 0004372108 | FORM499 | 811843:397929 | High confidence (95.0%) | 2026-08-05 12:18:25 |
| XO Tennessee, Inc. service_agent | 0004338174 | FORM499 | 811839:397921 | High confidence (95.0%) | 2026-08-05 12:18:25 |
| XO Massachusetts, Inc. service_agent | 0004339263 | FORM499 | 819960:346703 | High confidence (95.0%) | 2026-08-05 02:18:24 |
| XO Missouri, Inc. service_agent | 0004338216 | FORM499 | 819192:345924 | High confidence (95.0%) | 2026-08-05 00:18:22 |
| XO Arizona, Inc. service_agent | 0004372082 | FORM499 | 818764:345582 | High confidence (95.0%) | 2026-08-04 23:48:23 |
| XO Idaho, Inc. service_agent | 0004338042 | FORM499 | 818760:345578 | High confidence (95.0%) | 2026-08-04 23:48:23 |
| XO Michigan, Inc. service_agent | 0004339578 | FORM499 | 818736:345561 | High confidence (95.0%) | 2026-08-04 23:48:23 |
| XO DC, Inc. service_agent | 0004339313 | FORM499 | 818658:345499 | High confidence (95.0%) | 2026-08-04 23:48:23 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 818660:345503 | High confidence (95.0%) | 2026-08-04 23:48:23 |
| XO Georgia, Inc. service_agent | 0004338158 | FORM499 | 818594:345449 | High confidence (95.0%) | 2026-08-04 23:48:22 |
| XO Florida, Inc. service_agent | 0004338117 | FORM499 | 818316:345231 | High confidence (95.0%) | 2026-08-04 23:18:23 |
| XO Colorado, LLC service_agent | 0004372090 | FORM499 | 818084:345082 | High confidence (95.0%) | 2026-08-04 23:18:23 |
| XO New York, Inc. service_agent | 0004339248 | FORM499 | 818002:345008 | High confidence (95.0%) | 2026-08-04 23:18:22 |
| XO Maryland, LLC service_agent | 0004339321 | FORM499 | 818036:345044 | High confidence (95.0%) | 2026-08-04 23:18:22 |
| XO New Jersey, Inc. service_agent | 0004339271 | FORM499 | 818038:345048 | High confidence (95.0%) | 2026-08-04 23:18:22 |
| XO Illinois, Inc. service_agent | 0004339693 | FORM499 | 817402:344660 | High confidence (95.0%) | 2026-08-04 22:18:23 |
| XO Ohio, Inc. service_agent | 0004339719 | FORM499 | 811845:342286 | High confidence (95.0%) | 2026-08-04 17:18:22 |
| XO Washington, Inc. service_agent | 0003747953 | FORM499 | 811830:342265 | High confidence (95.0%) | 2026-08-04 17:18:22 |
| XO Utah, Inc. service_agent | 0004372108 | FORM499 | 811843:342282 | High confidence (95.0%) | 2026-08-04 17:18:22 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 811836:342270 | High confidence (95.0%) | 2026-08-04 17:18:22 |
| XO Tennessee, Inc. service_agent | 0004338174 | FORM499 | 811839:342274 | High confidence (95.0%) | 2026-08-04 17:18:22 |
| XO California, Inc. service_agent | 0004373171 | FORM499 | 811842:342278 | High confidence (95.0%) | 2026-08-04 17:18:22 |
| XO Missouri, Inc. service_agent | 0004338216 | FORM499 | 819192:290277 | High confidence (95.0%) | 2026-08-04 01:48:19 |
| XO Arizona, Inc. service_agent | 0004372082 | FORM499 | 818764:289935 | High confidence (95.0%) | 2026-08-04 01:18:18 |
| XO Georgia, Inc. service_agent | 0004338158 | FORM499 | 818594:289802 | High confidence (95.0%) | 2026-08-04 01:18:18 |
| XO DC, Inc. service_agent | 0004339313 | FORM499 | 818658:289852 | High confidence (95.0%) | 2026-08-04 01:18:18 |
| XO Idaho, Inc. service_agent | 0004338042 | FORM499 | 818760:289931 | High confidence (95.0%) | 2026-08-04 01:18:18 |
| XO Michigan, Inc. service_agent | 0004339578 | FORM499 | 818736:289914 | High confidence (95.0%) | 2026-08-04 01:18:18 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 818660:289856 | High confidence (95.0%) | 2026-08-04 01:18:18 |
| XO Colorado, LLC service_agent | 0004372090 | FORM499 | 818084:289435 | High confidence (95.0%) | 2026-08-04 00:48:19 |
| XO New Jersey, Inc. service_agent | 0004339271 | FORM499 | 818038:289401 | High confidence (95.0%) | 2026-08-04 00:48:19 |
| XO Florida, Inc. service_agent | 0004338117 | FORM499 | 818316:289584 | High confidence (95.0%) | 2026-08-04 00:48:19 |
| XO New York, Inc. service_agent | 0004339248 | FORM499 | 818002:289361 | High confidence (95.0%) | 2026-08-04 00:48:19 |
| XO Maryland, LLC service_agent | 0004339321 | FORM499 | 818036:289397 | High confidence (95.0%) | 2026-08-04 00:48:19 |
| XO Illinois, Inc. service_agent | 0004339693 | FORM499 | 817402:289013 | High confidence (95.0%) | 2026-08-03 23:48:18 |
| XO Ohio, Inc. service_agent | 0004339719 | FORM499 | 811845:286639 | High confidence (95.0%) | 2026-08-03 18:48:17 |
| XO Tennessee, Inc. service_agent | 0004338174 | FORM499 | 811839:286627 | High confidence (95.0%) | 2026-08-03 18:48:17 |
| XO Utah, Inc. service_agent | 0004372108 | FORM499 | 811843:286635 | High confidence (95.0%) | 2026-08-03 18:48:17 |
| XO Washington, Inc. service_agent | 0003747953 | FORM499 | 811830:286618 | High confidence (95.0%) | 2026-08-03 18:48:17 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 811836:286623 | High confidence (95.0%) | 2026-08-03 18:48:17 |
| XO California, Inc. service_agent | 0004373171 | FORM499 | 811842:286631 | High confidence (95.0%) | 2026-08-03 18:48:17 |
| XO Texas, Inc. service_agent | 0004338182 | FORM499 | 820148:180115 | High confidence (95.0%) | 2026-08-02 00:18:12 |
| XO Massachusetts, Inc. service_agent | 0004339263 | FORM499 | 819960:179762 | High confidence (95.0%) | 2026-08-01 23:48:12 |
| XO Missouri, Inc. service_agent | 0004338216 | FORM499 | 819192:178983 | High confidence (95.0%) | 2026-08-01 23:18:11 |
| XO Idaho, Inc. service_agent | 0004338042 | FORM499 | 818760:178637 | High confidence (95.0%) | 2026-08-01 22:18:11 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 818660:178562 | High confidence (95.0%) | 2026-08-01 22:18:11 |
| XO Michigan, Inc. service_agent | 0004339578 | FORM499 | 818736:178620 | High confidence (95.0%) | 2026-08-01 22:18:11 |
| XO Arizona, Inc. service_agent | 0004372082 | FORM499 | 818764:178641 | High confidence (95.0%) | 2026-08-01 22:18:11 |
| XO Georgia, Inc. service_agent | 0004338158 | FORM499 | 818594:178508 | High confidence (95.0%) | 2026-08-01 22:18:11 |
| XO DC, Inc. service_agent | 0004339313 | FORM499 | 818658:178558 | High confidence (95.0%) | 2026-08-01 22:18:11 |
| XO Florida, Inc. service_agent | 0004338117 | FORM499 | 818316:178290 | High confidence (95.0%) | 2026-08-01 21:48:11 |
| XO New Jersey, Inc. service_agent | 0004339271 | FORM499 | 818038:178107 | High confidence (95.0%) | 2026-08-01 21:48:10 |
| XO Colorado, LLC service_agent | 0004372090 | FORM499 | 818084:178141 | High confidence (95.0%) | 2026-08-01 21:48:10 |
| XO New York, Inc. service_agent | 0004339248 | FORM499 | 818002:178067 | High confidence (95.0%) | 2026-08-01 21:48:10 |
| XO Maryland, LLC service_agent | 0004339321 | FORM499 | 818036:178103 | High confidence (95.0%) | 2026-08-01 21:48:10 |
| XO Illinois, Inc. service_agent | 0004339693 | FORM499 | 817402:177719 | High confidence (95.0%) | 2026-08-01 19:18:13 |
| XO Pennsylvania, Inc. service_agent | 0004339905 | FORM499 | 811836:175329 | High confidence (95.0%) | 2026-08-01 16:18:10 |
| XO Washington, Inc. service_agent | 0003747953 | FORM499 | 811830:175324 | High confidence (95.0%) | 2026-08-01 16:18:10 |
| XO California, Inc. service_agent | 0004373171 | FORM499 | 811842:175337 | High confidence (95.0%) | 2026-08-01 16:18:10 |
| XO Tennessee, Inc. service_agent | 0004338174 | FORM499 | 811839:175333 | High confidence (95.0%) | 2026-08-01 16:18:10 |
| XO Utah, Inc. service_agent | 0004372108 | FORM499 | 811843:175341 | High confidence (95.0%) | 2026-08-01 16:18:10 |
| XO Ohio, Inc. service_agent | 0004339719 | FORM499 | 811845:175345 | High confidence (95.0%) | 2026-08-01 16:18:10 |