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 |
|---|---|---|---|---|---|
| 2018-06-20 | 629-213-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2018-06-20 | 629-213-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2018-06-20 | 629-213-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2018-05-04 | 931-774-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | MTPLEASANT | TN |
| 2018-03-20 | 423-806-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | MIDWAY | TN |
| 2018-01-31 | 629-867-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2017-08-24 | 423-417-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | CHATTNOOGA | TN |
| 2017-05-23 | 423-856-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | ATHENS | TN |
| 2017-04-25 | 629-228-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2017-04-24 | 615-757-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | HENDERSNVL | TN |
| 2017-04-10 | 865-995-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | MARYVILLE | TN |
| 2017-02-24 | 629-802-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2017-01-11 | 931-386-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | WINCHESTER | TN |
| 2016-12-20 | 423-528-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | BAILEYTON | TN |
| 2016-11-10 | 423-445-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | SURGOINSVL | TN |
| 2016-11-10 | 423-546-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | BULLS GAP | TN |
| 2016-09-07 | 423-594-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | DAYTON | TN |
| 2016-08-26 | 629-203-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-08-23 | 423-845-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | BRISTOL | TN |
| 2016-08-22 | 615-657-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | ASHLAND CY | TN |
| 2016-06-13 | 615-716-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | FRANKLIN | TN |
| 2016-05-19 | 629-303-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-05-19 | 629-303-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-04-28 | 615-600-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2016-03-25 | 423-651-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | JASPER | TN |
| 2016-03-25 | 865-737-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | NORRIS | TN |
| 2016-03-25 | 931-534-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | DOVER | TN |
| 2016-03-25 | 931-820-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | SANGO | TN |
| 2016-02-11 | 931-716-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | CENTERVL | TN |
| 2016-02-10 | 423-460-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | MOUNTAINCY | TN |
| 2016-02-10 | 423-788-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | JONESBORO | TN |
| 2016-01-26 | 629-800-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2015-12-22 | 931-288-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | LEWISBURG | TN |
| 2015-10-23 | 615-571-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2015-10-22 | 931-503-7XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | CLARKSVL | TN |
| 2015-07-21 | 629-202-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2015-05-13 | 615-919-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2015-05-13 | 615-928-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2015-04-13 | 615-648-8XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | MURFREESBO | TN |
| 2015-03-31 | 615-721-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | FRANKLIN | TN |
| 2015-03-31 | 615-721-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | FRANKLIN | TN |
| 2015-03-18 | 615-721-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | FRANKLIN | 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.