NumberResearchRecent thousands-block assignments
2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 |
|---|---|---|---|---|---|---|---|
| 2015-03-10 | 857-757-1XXX | 1000–1999 | Assigned | THE VOICE APPLICATION NETWORK, LLC | 507J | CAMBRIDGE | MA |
| 2015-03-04 | 857-316-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRIGHTON | MA |
| 2015-03-04 | 857-316-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRIGHTON | MA |
| 2015-03-04 | 857-316-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BRIGHTON | MA |
| 2015-03-03 | 857-314-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MILTON | MA |
| 2015-03-03 | 857-320-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CAMBRIDGE | MA |
| 2015-02-25 | 857-201-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | WINTHROP | MA |
| 2015-02-25 | 857-373-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BELMONT | MA |
| 2015-02-25 | 857-496-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | SO BOSTON | MA |
| 2015-02-24 | 857-304-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | WATERTOWN | MA |
| 2015-02-24 | 857-327-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2015-02-24 | 857-402-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | EASTBOSTON | MA |
| 2015-02-19 | 857-245-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BROOKLINE | MA |
| 2015-02-19 | 857-245-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BROOKLINE | MA |
| 2015-02-19 | 857-245-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BROOKLINE | MA |
| 2015-02-19 | 857-245-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BROOKLINE | MA |
| 2015-02-03 | 857-327-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-02-03 | 857-327-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-02-03 | 857-529-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | CAMBRIDGE | MA |
| 2015-02-03 | 857-529-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | CAMBRIDGE | MA |
| 2015-02-03 | 857-529-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | CAMBRIDGE | MA |
| 2015-02-03 | 857-529-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | CAMBRIDGE | MA |
| 2015-02-03 | 857-529-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | CAMBRIDGE | MA |
| 2015-01-29 | 857-314-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | MILTON | MA |
| 2015-01-29 | 857-314-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | MILTON | MA |
| 2015-01-28 | 857-310-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-01-28 | 857-310-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-01-28 | 857-310-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-01-26 | 857-228-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | WATERTOWN | MA |
| 2015-01-26 | 857-267-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | MILTON | MA |
| 2015-01-26 | 857-309-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | DORCHESTER | MA |
| 2015-01-26 | 857-309-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | DORCHESTER | MA |
| 2015-01-26 | 857-309-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | DORCHESTER | MA |
| 2015-01-23 | 857-352-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2015-01-23 | 857-352-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2015-01-23 | 857-352-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2015-01-19 | 857-707-2XXX | 2000–2999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2015-01-19 | 857-707-5XXX | 5000–5999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2015-01-19 | 857-707-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROOKLINE | MA |
| 2015-01-02 | 857-317-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOSTON | MA |
| 2014-12-29 | 857-310-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | BOSTON | MA |
| 2014-12-29 | 857-770-0XXX | 0000–0999 | Assigned | INTRADO COMMUNICATIONS, LLC | 116E | BOSTON | MA |
| 2014-12-29 | 857-770-9XXX | 9000–9999 | Assigned | INTRADO COMMUNICATIONS, LLC | 116E | BOSTON | MA |
| 2014-12-27 | 857-310-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2014-12-27 | 857-310-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2014-12-27 | 857-310-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2014-12-27 | 857-310-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2014-12-27 | 857-330-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2014-12-23 | 857-201-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | WINTHROP | MA |
| 2014-12-23 | 857-201-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | WINTHROP | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.