NumberResearchRecent thousands-block assignments
0 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, all time — NPA 551
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-05-01 | 551-417-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2024-09-25 | 551-382-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | ENGLEWOOD | NJ |
| 2023-02-14 | 551-367-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | FAIR LAWN | NJ |
| 2021-11-05 | 551-328-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2021-03-26 | 551-837-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2021-03-26 | 551-837-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2021-03-26 | 551-837-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2021-01-19 | 551-309-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2020-11-20 | 551-307-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2020-10-21 | 551-430-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2020-03-19 | 551-306-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | UNION CITY | NJ |
| 2020-02-13 | 551-557-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | PARK RIDGE | NJ |
| 2020-01-02 | 551-306-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | UNION CITY | NJ |
| 2018-06-29 | 551-249-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | PARK RIDGE | NJ |
| 2018-03-15 | 551-249-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | PARK RIDGE | NJ |
| 2016-06-09 | 551-205-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2016-06-09 | 551-205-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2016-06-09 | 551-205-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2016-06-09 | 551-205-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2016-03-15 | 551-205-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2016-03-15 | 551-205-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | JERSEYCITY | NJ |
| 2007-07-17 | 551-996-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
| 2007-07-17 | 551-996-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NJ | 7142 | HACKENSACK | NJ |
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.