NumberResearchRecent thousands-block assignments
2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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, last 30 days — NPA 857
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-06-08 | 857-233-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-244-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-244-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-244-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-244-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-246-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-246-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-246-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-246-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-246-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-246-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-318-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-318-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-318-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-08 | 857-318-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-04 | 857-998-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | CAMBRIDGE | MA |
| 2009-06-03 | 857-249-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-03 | 857-249-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-03 | 857-249-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-03 | 857-249-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-03 | 857-249-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-03 | 857-249-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-06-03 | 857-249-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2009-05-12 | 857-225-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2009-05-12 | 857-225-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2009-04-16 | 857-230-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ROXBURY | MA |
| 2009-04-15 | 857-244-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOSTON | MA |
| 2009-04-10 | 857-389-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CHARLESTN | MA |
| 2009-03-31 | 857-995-0XXX | 0000–0999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | SOMERVILLE | MA |
| 2009-02-18 | 857-756-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CAMBRIDGE | MA |
| 2009-01-13 | 857-364-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2008-12-19 | 857-244-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | BOSTON | MA |
| 2008-11-18 | 857-235-0XXX | 0000–0999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-1XXX | 1000–1999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-2XXX | 2000–2999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-3XXX | 3000–3999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-4XXX | 4000–4999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-5XXX | 5000–5999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-6XXX | 6000–6999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-7XXX | 7000–7999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-8XXX | 8000–8999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-18 | 857-235-9XXX | 9000–9999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | CAMBRIDGE | MA |
| 2008-11-10 | 857-574-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | EASTBOSTON | MA |
| 2008-11-07 | 857-244-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2008-10-06 | 857-939-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | QUINCY | MA |
| 2008-10-03 | 857-284-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2008-09-09 | 857-389-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CHARLESTN | MA |
| 2008-08-29 | 857-574-2XXX | 2000–2999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | EASTBOSTON | MA |
| 2008-08-06 | 857-236-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
| 2008-08-06 | 857-236-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BOSTON | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.