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
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2007-05-14 | 857-366-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOSTON | MA |
| 2007-05-08 | 857-654-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-05-08 | 857-654-5XXX | 5000–5999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-05-04 | 857-636-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NEWTON | MA |
| 2007-04-19 | 857-445-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2007-04-19 | 857-445-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2007-04-13 | 857-207-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2007-04-09 | 857-241-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-04-09 | 857-241-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-03-12 | 857-241-0XXX | 0000–0999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-02-23 | 857-654-0XXX | 0000–0999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-02-22 | 857-654-2XXX | 2000–2999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-02-22 | 857-654-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-02-07 | 857-218-5XXX | 5000–5999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BROOKLINE | MA |
| 2007-02-07 | 857-218-6XXX | 6000–6999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BROOKLINE | MA |
| 2007-02-07 | 857-218-7XXX | 7000–7999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BROOKLINE | MA |
| 2007-02-05 | 857-345-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HYDE PARK | MA |
| 2007-01-31 | 857-654-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2007-01-17 | 857-218-3XXX | 3000–3999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BROOKLINE | MA |
| 2007-01-17 | 857-218-4XXX | 4000–4999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BROOKLINE | MA |
| 2007-01-16 | 857-403-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | QUINCY | MA |
| 2006-12-22 | 857-654-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | BOSTON | MA |
| 2006-12-21 | 857-234-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2006-12-14 | 857-389-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CHARLESTN | MA |
| 2006-12-14 | 857-544-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ROXBURY | MA |
| 2006-12-06 | 857-345-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HYDE PARK | MA |
| 2006-11-20 | 857-334-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-11-13 | 857-362-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-11-13 | 857-362-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-11-13 | 857-362-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-11-13 | 857-362-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-11-09 | 857-245-0XXX | 0000–0999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | BROOKLINE | MA |
| 2006-11-09 | 857-245-1XXX | 1000–1999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | BROOKLINE | MA |
| 2006-11-09 | 857-245-2XXX | 2000–2999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | BROOKLINE | MA |
| 2006-11-09 | 857-245-3XXX | 3000–3999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | BROOKLINE | MA |
| 2006-11-09 | 857-245-4XXX | 4000–4999 | Assigned | YMAX COMMUNICATIONS CORP. - MA | 316E | BROOKLINE | MA |
| 2006-11-09 | 857-756-5XXX | 5000–5999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CAMBRIDGE | MA |
| 2006-11-08 | 857-334-0XXX | 0000–0999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-11-08 | 857-334-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-11-08 | 857-334-2XXX | 2000–2999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-11-03 | 857-345-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | HYDE PARK | MA |
| 2006-10-27 | 857-241-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-10-27 | 857-241-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-10-20 | 857-654-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-10-20 | 857-654-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-10-20 | 857-654-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-10-16 | 857-288-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOSTON | MA |
| 2006-10-16 | 857-288-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOSTON | MA |
| 2006-10-13 | 857-544-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ROXBURY | MA |
| 2006-10-10 | 857-334-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | 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.