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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-10-19 | 551-285-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | RUTHERFORD | NJ |
| 2016-09-15 | 551-254-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | UNION CITY | NJ |
| 2016-01-13 | 551-244-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | HACKENSACK | NJ |
| 2016-01-13 | 551-244-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | HACKENSACK | NJ |
| 2015-05-14 | 551-233-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | JERSEYCITY | NJ |
| 2015-04-03 | 551-256-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | JERSEYCITY | NJ |
| 2014-11-25 | 551-237-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | HACKENSACK | NJ |
| 2014-08-21 | 551-228-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | HACKENSACK | NJ |
| 2009-12-10 | 551-579-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | RAMSEY | NJ |
| 2005-12-29 | 551-497-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | HACKENSACK | NJ |
| 2005-11-07 | 551-497-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | 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.