NumberResearchRecent thousands-block assignments
2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2006-10-10 | 857-334-5XXX | 5000–5999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-10-05 | 857-345-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HYDE PARK | MA |
| 2006-10-05 | 857-362-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | BOSTON | MA |
| 2006-09-22 | 857-334-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-09-22 | 857-334-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-09-22 | 857-334-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-09-22 | 857-334-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-09-20 | 857-277-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | BOSTON | MA |
| 2006-09-20 | 857-277-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | BOSTON | MA |
| 2006-09-12 | 857-277-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-09-12 | 857-277-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-09-12 | 857-445-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-08-15 | 857-253-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CAMBRIDGE | MA |
| 2006-08-15 | 857-277-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-08-15 | 857-277-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-08-15 | 857-413-0XXX | 0000–0999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-08-15 | 857-413-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-08-15 | 857-413-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-08-15 | 857-488-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-08-15 | 857-544-5XXX | 5000–5999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ROXBURY | MA |
| 2006-08-11 | 857-345-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HYDE PARK | MA |
| 2006-07-25 | 857-362-2XXX | 2000–2999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BOSTON | MA |
| 2006-07-25 | 857-362-3XXX | 3000–3999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BOSTON | MA |
| 2006-07-25 | 857-362-4XXX | 4000–4999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BOSTON | MA |
| 2006-07-25 | 857-362-5XXX | 5000–5999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BOSTON | MA |
| 2006-07-25 | 857-362-6XXX | 6000–6999 | Assigned | VERIZON NEW ENGLAND INC. | 9102 | BOSTON | MA |
| 2006-07-12 | 857-488-2XXX | 2000–2999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-07-11 | 857-488-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-06-30 | 857-233-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-06-29 | 857-277-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | BOSTON | MA |
| 2006-06-15 | 857-544-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ROXBURY | MA |
| 2006-06-15 | 857-928-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CAMBRIDGE | MA |
| 2006-06-06 | 857-233-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-06-06 | 857-233-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-06-02 | 857-272-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BOSTON | MA |
| 2006-06-02 | 857-272-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BOSTON | MA |
| 2006-06-02 | 857-272-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BOSTON | MA |
| 2006-06-02 | 857-272-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BOSTON | MA |
| 2006-06-01 | 857-366-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-06-01 | 857-366-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | BOSTON | MA |
| 2006-05-18 | 857-232-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MA | 892D | NEWTON | MA |
| 2006-05-17 | 857-928-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CAMBRIDGE | MA |
| 2006-05-04 | 857-233-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | BOSTON | MA |
| 2006-05-04 | 857-233-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | BOSTON | MA |
| 2006-05-04 | 857-233-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | BOSTON | MA |
| 2006-05-03 | 857-233-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
| 2006-04-05 | 857-226-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NEWTON | MA |
| 2006-03-28 | 857-272-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BOSTON | MA |
| 2006-03-28 | 857-272-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BOSTON | MA |
| 2006-03-24 | 857-445-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BOSTON | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.