NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
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 |
|---|---|---|---|---|---|
| 2026-02-19 | 840-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | S BERNDINO | CA |
| 2026-01-14 | 440-924 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | HILLCREST | OH |
| 2025-11-19 | 332-303 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-304 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-305 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-306 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-307 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-308 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-312 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-313 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-314 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-11-19 | 332-315 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2025-10-28 | 272-461 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILLIAMSPT | PA |
| 2025-08-13 | 929-825 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN06 | NY |
| 2025-08-07 | 227-293 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | CUMBERLAND | MD |
| 2025-07-11 | 223-382 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HARISBGZN1 | PA |
| 2025-04-08 | 251-503 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MOBILE | AL |
| 2025-03-27 | 318-457 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SHREVEPORT | LA |
| 2025-01-09 | 479-554 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR | 7277 | FORT SMITH | AR |
| 2024-12-12 | 728-231 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | WPALMBEACH | FL |
| 2024-12-11 | 302-673 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILFORD | DE |
| 2024-11-11 | 681-548 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEWISBURG | WV |
| 2024-09-12 | 716-781 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | JAMESTOWN | NY |
| 2024-09-05 | 319-497 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CEDAR RPDS | IA |
| 2024-08-28 | 701-991 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FARGO | ND |
| 2024-06-26 | 309-380 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ROCKISLAND | IL |
| 2024-06-26 | 563-222 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MUSCATINE | IA |
| 2024-06-13 | 582-268 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ALTOONA | PA |
| 2024-06-05 | 585-751 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | MT MORRIS | NY |
| 2024-05-31 | 667-492 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SEVERN | MD |
| 2024-05-21 | 329-226 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KINGSTON | NY |
| 2024-05-21 | 607-501 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ONEONTA | NY |
| 2024-05-08 | 434-351 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHARLOTSVL | VA |
| 2024-05-01 | 218-709 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DULUTH | MN |
| 2024-05-01 | 320-478 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ST CLOUD | MN |
| 2024-05-01 | 507-979 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ROCHESTER | MN |
| 2024-04-24 | 865-303 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-03-07 | 352-576 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BROOKSVL | FL |
| 2024-02-28 | 585-725 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | MEDINA | NY |
| 2024-02-28 | 716-516 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | YOUNGSTOWN | NY |
| 2024-01-08 | 520-706 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-707 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-708 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-713 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-714 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-715 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-716 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-717 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
| 2024-01-08 | 520-718 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ | 7465 | SIERRAVIST | AZ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.