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 520
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 |
|---|---|---|---|---|---|---|---|
| 2025-12-22 | 520-394-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | NOGALES | AZ |
| 2016-02-23 | 520-719-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2014-08-07 | 520-448-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2012-08-21 | 520-332-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2010-07-15 | 520-441-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2006-07-07 | 520-908-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2006-07-07 | 520-908-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2006-03-02 | 520-576-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2005-08-19 | 520-407-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2005-08-19 | 520-495-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2005-04-07 | 520-407-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2005-04-04 | 520-225-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2005-02-17 | 520-232-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
| 2003-12-05 | 520-204-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | TUCSON | AZ |
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.