NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026
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 — NPA 256
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-01-07 | 256-863-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HUNTSVILLE | AL |
| 2023-03-31 | 256-988-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HUNTSVILLE | AL |
| 2021-12-16 | 256-936-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2020-08-10 | 256-806-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2020-08-10 | 256-806-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2020-08-10 | 256-806-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2020-08-10 | 256-806-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2019-03-06 | 256-839-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | GOODWATER | AL |
| 2019-02-04 | 256-850-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | MADISON | AL |
| 2018-03-12 | 256-678-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2018-03-12 | 256-678-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2018-03-12 | 256-678-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2018-03-12 | 256-678-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2018-03-12 | 256-678-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2018-03-12 | 256-678-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2018-02-23 | 256-530-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ANNISTON | AL |
| 2016-07-25 | 256-947-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2016-06-20 | 256-829-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HAZELGREEN | AL |
| 2015-10-06 | 256-677-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | GUNTERSVL | AL |
| 2014-03-21 | 256-801-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2013-11-26 | 256-686-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | DECATUR | AL |
| 2013-04-17 | 256-924-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2012-07-26 | 256-676-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ANNISTON | AL |
| 2012-07-26 | 256-676-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ANNISTON | AL |
| 2012-07-26 | 256-676-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ANNISTON | AL |
| 2012-04-18 | 256-686-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | DECATUR | AL |
| 2011-11-30 | 256-754-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HARTSELLE | AL |
| 2011-09-01 | 256-924-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2011-03-25 | 256-324-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | RUSSELLVL | AL |
| 2010-12-29 | 256-273-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | FORT PAYNE | AL |
| 2010-12-29 | 256-401-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | SYLACAUGA | AL |
| 2010-10-20 | 256-691-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ATTALLA | AL |
| 2010-10-12 | 256-522-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | MOULTON | AL |
| 2010-10-12 | 256-644-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | JACKSONVL | AL |
| 2010-07-08 | 256-414-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ALEXANDRCY | AL |
| 2009-08-31 | 256-690-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
| 2009-08-18 | 256-850-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | MADISON | AL |
| 2007-03-22 | 256-320-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | SHEFFIELD | AL |
| 2006-11-15 | 256-281-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | BOAZ | AL |
| 2006-11-15 | 256-444-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ATHENS | AL |
| 2006-11-15 | 256-649-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | TALLADEGA | AL |
| 2006-11-15 | 256-660-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ALBERTVL | AL |
| 2006-11-15 | 256-676-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | ANNISTON | AL |
| 2006-11-15 | 256-680-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | GADSDEN | AL |
| 2006-11-15 | 256-712-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | FLORENCE | AL |
| 2006-11-15 | 256-841-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | CULLMAN | AL |
| 2006-11-15 | 256-898-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | DECATUR | AL |
| 2004-08-31 | 256-665-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7469 | HUNTSVILLE | AL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.