NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/18/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Block | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2026-01-27 | 423-969-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | CLEVELAND | TN |
| 2024-04-24 | 865-303-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-303-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2024-04-24 | 865-434-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | OAK RIDGE | TN |
| 2023-02-22 | 615-954-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2023-02-22 | 615-954-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2022-05-12 | 865-895-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | KNOXVILLE | TN |
| 2021-08-05 | 629-258-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2021-06-29 | 629-253-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2021-04-15 | 629-253-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2021-04-15 | 629-253-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2021-04-15 | 629-253-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2021-04-15 | 629-253-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2021-03-11 | 615-989-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | GALLATIN | TN |
| 2020-08-05 | 615-882-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2020-08-04 | 615-984-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | SMYRNA | TN |
| 2019-09-17 | 629-219-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | MURFREESBO | TN |
| 2019-05-02 | 629-230-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | FRANKLIN | TN |
| 2019-02-21 | 629-221-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2019-02-04 | 423-830-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | KINGSPORT | TN |
| 2019-01-10 | 865-867-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | KNOXVILLE | TN |
| 2018-10-25 | 629-802-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2018-08-01 | 629-221-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2018-08-01 | 629-221-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2018-07-26 | 615-235-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | LEBANON | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.