NumberResearchRecent thousands-block assignments
0 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, all time — NPA 551
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-03-24 | 551-322-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | TEANECK | NJ |
| 2022-03-24 | 551-334-5XXX | 5000–5999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | KEARNY | NJ |
| 2022-03-08 | 551-899-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HASBROKHTS | NJ |
| 2022-03-08 | 551-955-9XXX | 9000–9999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | WYCKOFF | NJ |
| 2022-03-04 | 551-366-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | ENGLEWOOD | NJ |
| 2022-03-04 | 551-727-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | BAYONNE | NJ |
| 2022-03-04 | 551-799-9XXX | 9000–9999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | UNION CITY | NJ |
| 2022-03-03 | 551-966-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | FAIR LAWN | NJ |
| 2022-03-01 | 551-733-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | RIDGEWOOD | NJ |
| 2022-03-01 | 551-766-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | RUTHERFORD | NJ |
| 2022-02-24 | 551-588-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | RAMSEY | NJ |
| 2022-02-24 | 551-788-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | PARK RIDGE | NJ |
| 2022-02-18 | 551-346-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CLOSTER | NJ |
| 2022-02-18 | 551-688-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | LEONIA | NJ |
| 2022-02-04 | 551-866-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CLIFFSIDE | NJ |
| 2021-09-16 | 551-328-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | JERSEYCITY | NJ |
| 2021-03-16 | 551-837-4XXX | 4000–4999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HACKENSACK | 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.