NumberResearchRecent thousands-block assignments
25 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 475
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 |
|---|---|---|---|---|---|---|---|
| 2015-06-18 | 475-206-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | DANBURY | CT |
| 2015-06-18 | 475-343-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | MERIDEN | CT |
| 2015-06-18 | 475-619-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | STAMFORD | CT |
| 2015-06-18 | 475-655-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NEW HAVEN | CT |
| 2015-06-10 | 475-266-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NORWALK | CT |
| 2015-06-05 | 475-747-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NORWALK | CT |
| 2015-06-05 | 475-747-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | NORWALK | CT |
| 2015-06-05 | 475-777-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ANSONIDRBY | CT |
| 2015-06-05 | 475-897-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | GREENWICH | CT |
| 2015-06-03 | 475-655-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | NEW HAVEN | CT |
| 2015-06-02 | 475-330-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | FAIRFIELD | CT |
| 2015-06-01 | 475-675-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | SEYMOUR | CT |
| 2015-06-01 | 475-988-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | BRIDGEPORT | CT |
| 2015-05-29 | 475-221-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | BRANFORD | CT |
| 2015-05-28 | 475-277-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | WILTON | CT |
| 2015-05-26 | 475-269-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CT | 639C | HUNTINGTON | CT |
| 2015-05-21 | 475-988-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BRIDGEPORT | CT |
| 2015-05-18 | 475-549-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | MILFORD | CT |
| 2015-05-18 | 475-888-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | FAIRFIELD | CT |
| 2015-05-14 | 475-213-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | STAMFORD | CT |
| 2015-05-14 | 475-213-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | STAMFORD | CT |
| 2015-05-14 | 475-213-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | STAMFORD | CT |
| 2015-05-14 | 475-213-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | STAMFORD | CT |
| 2015-05-14 | 475-213-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | STAMFORD | CT |
| 2015-05-07 | 475-206-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | DANBURY | CT |
| 2015-05-07 | 475-206-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | DANBURY | CT |
| 2015-05-07 | 475-619-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | STAMFORD | CT |
| 2015-05-06 | 475-522-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CT | 639C | MADISON | CT |
| 2015-05-06 | 475-549-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CT | 639C | MILFORD | CT |
| 2015-05-06 | 475-558-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CT | 639C | NEW CANAAN | CT |
| 2015-04-29 | 475-215-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CT | 639C | RIDGEFIELD | CT |
| 2015-04-29 | 475-277-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CT | 639C | WILTON | CT |
| 2015-04-29 | 475-558-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | NEW CANAAN | CT |
| 2015-04-29 | 475-777-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ANSONIDRBY | CT |
| 2015-04-24 | 475-215-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | RIDGEFIELD | CT |
| 2015-04-24 | 475-219-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CT | 639C | WOLCOTT | CT |
| 2015-04-24 | 475-221-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CT | 639C | BRANFORD | CT |
| 2015-04-24 | 475-325-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CT | 639C | GEORGETOWN | CT |
| 2015-04-24 | 475-444-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEWTOWN | CT |
| 2015-04-24 | 475-444-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CT | 639C | NEWTOWN | CT |
| 2015-04-24 | 475-522-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | MADISON | CT |
| 2015-04-24 | 475-522-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | MADISON | CT |
| 2015-04-24 | 475-549-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | MILFORD | CT |
| 2015-04-24 | 475-549-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | MILFORD | CT |
| 2015-04-24 | 475-558-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW CANAAN | CT |
| 2015-04-24 | 475-558-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CT | 199F | NEW CANAAN | CT |
| 2015-04-24 | 475-777-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CT | 639C | ANSONIDRBY | CT |
| 2015-04-23 | 475-206-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CT | 639C | DANBURY | CT |
| 2015-04-23 | 475-208-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CT | 639C | NORWALK | CT |
| 2015-04-23 | 475-212-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CT | 639C | NAUGATUCK | CT |
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.