NumberResearchRecent thousands-block assignments
29 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 551
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 |
|---|---|---|---|---|---|---|---|
| 2026-09-16 | 551-440-3XXX | 3000–3999 | Assigned | CSC WIRELESS, LLC | 425J | HACKENSACK | NJ |
| 2026-09-16 | 551-440-4XXX | 4000–4999 | Assigned | CSC WIRELESS, LLC | 425J | HACKENSACK | NJ |
| 2026-09-16 | 551-440-5XXX | 5000–5999 | Assigned | CSC WIRELESS, LLC | 425J | HACKENSACK | NJ |
| 2026-09-14 | 551-431-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 6391 | JERSEYCITY | NJ |
| 2026-09-14 | 551-431-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 6391 | JERSEYCITY | NJ |
| 2026-09-14 | 551-431-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 6391 | JERSEYCITY | NJ |
| 2026-09-14 | 551-438-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | UNION CITY | NJ |
| 2026-09-03 | 551-439-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-439-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-439-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-439-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-439-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-439-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-440-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-440-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-440-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-09-03 | 551-440-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2026-08-26 | 551-408-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NJ | 637C | DUMONT | NJ |
| 2026-08-26 | 551-413-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NJ | 637C | KEARNY | NJ |
| 2026-08-26 | 551-413-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NJ | 637C | KEARNY | NJ |
| 2026-08-26 | 551-413-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NJ | 637C | KEARNY | NJ |
| 2026-08-26 | 551-415-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NJ | 637C | LEONIA | NJ |
| 2026-08-26 | 551-415-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NJ | 637C | LEONIA | NJ |
| 2026-08-26 | 551-418-2XXX | 2000–2999 | Assigned | ONVOY, LLC - NJ | 637C | ORADELL | NJ |
| 2026-08-26 | 551-418-3XXX | 3000–3999 | Assigned | ONVOY, LLC - NJ | 637C | ORADELL | NJ |
| 2026-08-26 | 551-418-4XXX | 4000–4999 | Assigned | ONVOY, LLC - NJ | 637C | ORADELL | NJ |
| 2026-08-24 | 551-370-3XXX | 3000–3999 | Assigned | ONVOY, LLC - NJ | 637C | RIDGEWOOD | NJ |
| 2026-08-24 | 551-378-4XXX | 4000–4999 | Assigned | ONVOY, LLC - NJ | 637C | CLIFFSIDE | NJ |
| 2026-08-24 | 551-410-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NJ | 637C | RIDGEWOOD | NJ |
| 2026-08-18 | 551-410-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | RIDGEWOOD | NJ |
| 2026-08-18 | 551-428-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | JERSEYCITY | NJ |
| 2026-08-18 | 551-428-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - NJ | 118F | JERSEYCITY | NJ |
| 2026-08-13 | 551-429-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | BAYONNE | NJ |
| 2026-08-12 | 551-423-4XXX | 4000–4999 | Assigned | ONVOY, LLC - NJ | 637C | HACKENSACK | NJ |
| 2026-08-12 | 551-439-0XXX | 0000–0999 | Assigned | ONVOY, LLC - NJ | 637C | HACKENSACK | NJ |
| 2026-08-12 | 551-439-1XXX | 1000–1999 | Assigned | ONVOY, LLC - NJ | 637C | HACKENSACK | NJ |
| 2026-08-12 | 551-439-2XXX | 2000–2999 | Assigned | ONVOY, LLC - NJ | 637C | HACKENSACK | NJ |
| 2026-08-12 | 551-439-3XXX | 3000–3999 | Assigned | ONVOY, LLC - NJ | 637C | HACKENSACK | NJ |
| 2026-08-07 | 551-435-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NJ | 637C | BAYONNE | NJ |
| 2026-08-07 | 551-436-2XXX | 2000–2999 | Assigned | ONVOY, LLC - NJ | 637C | ENGLEWOOD | NJ |
| 2026-08-07 | 551-437-1XXX | 1000–1999 | Assigned | ONVOY, LLC - NJ | 637C | TEANECK | NJ |
| 2026-08-07 | 551-438-1XXX | 1000–1999 | Assigned | ONVOY, LLC - NJ | 637C | UNION CITY | NJ |
| 2026-07-30 | 551-966-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NJ | 637C | FAIR LAWN | NJ |
| 2026-07-27 | 551-421-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NJ | 637C | UNION CITY | NJ |
| 2026-07-27 | 551-421-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NJ | 637C | UNION CITY | NJ |
| 2026-07-27 | 551-438-0XXX | 0000–0999 | Assigned | ONVOY, LLC - NJ | 637C | UNION CITY | NJ |
| 2026-07-22 | 551-303-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NJ | 637C | CLOSTER | NJ |
| 2026-07-22 | 551-378-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NJ | 637C | CLIFFSIDE | NJ |
| 2026-07-22 | 551-378-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NJ | 637C | CLIFFSIDE | NJ |
| 2026-07-22 | 551-406-6XXX | 6000–6999 | Assigned | ONVOY, LLC - NJ | 637C | CLOSTER | NJ |
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.