NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 413
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-03-26 | 413-217-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | WILLIAMSTN | MA |
| 2019-02-06 | 413-881-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | LENOX | MA |
| 2017-04-18 | 413-299-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | HATFIELD | MA |
| 2017-04-04 | 413-436-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | WARREN | MA |
| 2017-04-04 | 413-595-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | HAMPDEN | MA |
| 2017-03-15 | 413-625-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | SHELBUNFLS | MA |
| 2016-12-05 | 413-998-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | SOUTHWICK | MA |
| 2016-09-19 | 413-300-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | DALTON | MA |
| 2014-11-12 | 413-252-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | BELCHERTN | MA |
| 2014-10-14 | 413-377-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | CHICOPEE | MA |
| 2014-10-03 | 413-899-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | SO DEERFLD | MA |
| 2014-09-12 | 413-676-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | TURNERSFLS | MA |
| 2014-06-18 | 413-923-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | NORTHAMPTN | MA |
| 2012-10-12 | 413-779-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | EASTHAMPTN | MA |
| 2012-04-30 | 413-893-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | MONSON | MA |
| 2012-01-10 | 413-887-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | HOLYOKE | MA |
| 2011-09-28 | 413-672-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | NORTHADAMS | MA |
| 2011-09-28 | 413-717-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | GREATBNGTN | MA |
| 2010-05-25 | 413-540-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | HOLYOKE | MA |
| 2010-04-23 | 413-634-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | CUMMINGTON | MA |
| 2008-09-26 | 413-327-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | LEE | MA |
| 2007-02-13 | 413-277-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | WARE | MA |
| 2006-04-18 | 413-308-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | LUDLOW | MA |
| 2006-04-18 | 413-485-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | WESTFIELD | MA |
| 2006-04-18 | 413-935-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA | 7103 | LONGMEADOW | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.