NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 509-444 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 509-462 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 509-477 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 509-688 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 509-755 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 509-769 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLARKSTON | WA | |
| 509-777 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 509-847 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 509-984 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPOKANE | WA | |
| 510-214 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD ALMD | CA | |
| 510-225 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD BKLY | CA | |
| 510-269 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD FRTVL | CA | |
| 510-270 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK OLIVR | CA | |
| 510-280 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD BKLY | CA | |
| 510-283 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ELSBR-PINL | CA | |
| 510-285 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | OKLD MN-PD | CA | |
| 510-322 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HRCUL-RODE | CA | |
| 510-323 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RICHMOND | CA | |
| 510-400 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK GRNLF | CA | |
| 510-404 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK GRNLF | CA | |
| 510-473 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD ALMD | CA | |
| 510-474 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK GRNLF | CA | |
| 510-478 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RICHMOND | CA | |
| 510-488 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD FRTVL | CA | |
| 510-493 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK MAIN | CA | |
| 510-497 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK OLIVR | CA | |
| 510-500 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD FRTVL | CA | |
| 510-542 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD BKLY | CA | |
| 510-545 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD ALMD | CA | |
| 510-564 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD TRNID | CA | |
| 510-572 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK OLIVR | CA | |
| 510-576 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HAYWARD | CA | |
| 510-578 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK MAIN | CA | |
| 510-580 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK OLIVR | CA | |
| 510-584 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HAYWARD | CA | |
| 510-621 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RICHMOND | CA | |
| 510-662 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ELSBR-PINL | CA | |
| 510-731 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HAYWARD | CA | |
| 510-740 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD MN-PD | CA | |
| 510-743 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK OLIVR | CA | |
| 510-768 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD MN-PD | CA | |
| 510-771 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK OLIVR | CA | |
| 510-788 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD MN-PD | CA | |
| 510-789 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | FRNK MAIN | CA | |
| 510-803 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HRCUL-RODE | CA | |
| 510-824 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK OLIVR | CA | |
| 510-842 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD FRTVL | CA | |
| 510-844 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD MN-PD | CA | |
| 510-856 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HAYWARD | CA | |
| 510-857 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK MAIN | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.