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 |
|---|---|---|---|---|---|---|---|
| 2017-12-07 | 857-324-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-12-07 | 857-324-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-11-07 | 857-322-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | EASTBOSTON | MA |
| 2017-10-31 | 857-322-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | EASTBOSTON | MA |
| 2017-10-26 | 857-315-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-10-26 | 857-315-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-10-25 | 857-997-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | SOMERVILLE | MA |
| 2017-10-24 | 857-315-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | BOSTON | MA |
| 2017-10-18 | 857-306-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-306-9XXX | 9000–9999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOSTON | MA |
| 2017-10-18 | 857-315-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-315-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-315-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-315-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-10-18 | 857-315-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOSTON | MA |
| 2017-09-25 | 857-296-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-09-25 | 857-296-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-09-25 | 857-296-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-09-25 | 857-296-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-09-25 | 857-296-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-09-25 | 857-296-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-09-25 | 857-298-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CAMBRIDGE | MA |
| 2017-08-28 | 857-773-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | JAMAICA PL | MA |
| 2017-08-23 | 857-297-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | NEWTON | MA |
| 2017-08-18 | 857-296-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2017-08-14 | 857-499-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | QUINCY | MA |
| 2017-08-09 | 857-292-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-08-09 | 857-292-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | 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.