NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 731
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-01-14 | 731-618-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | HUMBOLDT | TN |
| 2010-12-30 | 731-723-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | MILAN | TN |
| 2010-10-22 | 731-506-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2010-05-06 | 731-506-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2010-05-06 | 731-506-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2009-07-16 | 731-215-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2009-05-28 | 731-215-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2009-03-18 | 731-868-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2009-02-06 | 731-868-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2008-04-18 | 731-868-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2008-02-04 | 731-410-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2007-05-17 | 731-410-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2006-10-25 | 731-256-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
| 2005-05-03 | 731-334-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | DYERSBURG | TN |
| 2004-09-22 | 731-256-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.