NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026
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 507
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-05-28 | 507-933-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | ST PETER | MN |
| 2019-01-30 | 507-944-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | STEWARTVL | MN |
| 2016-09-22 | 507-702-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | GAYLORD | MN |
| 2016-02-16 | 507-407-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | WINDOM | MN |
| 2016-02-16 | 507-616-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | REDWOODFLS | MN |
| 2014-08-19 | 507-405-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | ROCHESTER | MN |
| 2013-09-24 | 507-591-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | MARSHALL | MN |
| 2013-07-01 | 507-800-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | JACKSON | MN |
| 2011-06-29 | 507-403-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | NORTHFIELD | MN |
| 2011-02-11 | 507-774-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | OWATONNA | MN |
| 2009-11-11 | 507-320-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | ALBERT LEA | MN |
| 2009-11-11 | 507-460-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | AUSTIN | MN |
| 2007-10-08 | 507-412-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | FARIBAULT | MN |
| 2007-02-06 | 507-858-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | WINONA | MN |
| 2004-06-14 | 507-226-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN | 7783 | ROCHESTER | MN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.