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 |
|---|---|---|---|---|---|---|---|
| 2015-04-22 | 857-304-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | WATERTOWN | MA |
| 2015-04-22 | 857-770-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2015-04-21 | 857-402-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | EASTBOSTON | MA |
| 2015-04-17 | 857-201-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | WINTHROP | MA |
| 2015-04-17 | 857-308-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | ROXBURY | MA |
| 2015-04-17 | 857-308-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | ROXBURY | MA |
| 2015-04-17 | 857-323-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CHELSEA | MA |
| 2015-04-17 | 857-323-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CHELSEA | MA |
| 2015-04-17 | 857-816-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | WINTHROP | MA |
| 2015-04-16 | 857-529-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CAMBRIDGE | MA |
| 2015-04-16 | 857-529-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CAMBRIDGE | MA |
| 2015-04-16 | 857-529-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CAMBRIDGE | MA |
| 2015-04-16 | 857-529-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CAMBRIDGE | MA |
| 2015-04-16 | 857-529-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CAMBRIDGE | MA |
| 2015-04-16 | 857-706-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | CAMBRIDGE | MA |
| 2015-04-15 | 857-256-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | EASTBOSTON | MA |
| 2015-04-15 | 857-302-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-327-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | BOSTON | MA |
| 2015-04-15 | 857-327-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-327-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-327-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-327-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-702-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-702-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-702-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-15 | 857-770-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | BOSTON | MA |
| 2015-04-01 | 857-706-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | CAMBRIDGE | MA |
| 2015-03-31 | 857-325-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NEWTON | MA |
| 2015-03-31 | 857-325-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NEWTON | MA |
| 2015-03-31 | 857-325-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NEWTON | MA |
| 2015-03-31 | 857-325-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NEWTON | MA |
| 2015-03-31 | 857-325-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NEWTON | MA |
| 2015-03-25 | 857-248-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-03-25 | 857-260-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-03-25 | 857-260-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-03-25 | 857-327-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-03-25 | 857-327-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-03-24 | 857-304-8XXX | 8000–8999 | Assigned | TC SYSTEMS, INC. | 7135 | WATERTOWN | MA |
| 2015-03-24 | 857-666-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | BROOKLINE | MA |
| 2015-03-24 | 857-666-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MA | 892D | BROOKLINE | MA |
| 2015-03-23 | 857-800-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MA | 892D | BOSTON | MA |
| 2015-03-23 | 857-800-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MA | 892D | BOSTON | MA |
| 2015-03-23 | 857-800-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MA | 892D | BOSTON | MA |
| 2015-03-19 | 857-856-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | CAMBRIDGE | MA |
| 2015-03-19 | 857-856-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MA | 892D | CAMBRIDGE | MA |
| 2015-03-19 | 857-856-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MA | 892D | CAMBRIDGE | MA |
| 2015-03-19 | 857-856-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MA | 892D | CAMBRIDGE | MA |
| 2015-03-13 | 857-452-0XXX | 0000–0999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CHARLESTN | MA |
| 2015-03-13 | 857-452-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CHARLESTN | MA |
| 2015-03-13 | 857-452-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CHARLESTN | 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.