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 281
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 |
|---|---|---|---|---|---|---|---|
| 2009-06-12 | 281-252-1XXX | 1000–1999 | Assigned | WESTEL, INC. - TX | 7399 | PINEHURST | TX |
| 2009-06-12 | 281-304-3XXX | 3000–3999 | Assigned | WESTEL, INC. - TX | 7399 | CYPRESS | TX |
| 2009-06-12 | 281-320-4XXX | 4000–4999 | Assigned | WESTEL, INC. - TX | 7399 | TOMBALL | TX |
| 2009-06-12 | 281-343-4XXX | 4000–4999 | Assigned | WESTEL, INC. - TX | 7399 | SMITHERSLK | TX |
| 2009-06-12 | 281-346-5XXX | 5000–5999 | Assigned | WESTEL, INC. - TX | 7399 | VLY LODGE | TX |
| 2009-06-12 | 281-393-3XXX | 3000–3999 | Assigned | WESTEL, INC. - TX | 7399 | LIVERPOOL | TX |
| 2009-06-12 | 281-399-6XXX | 6000–6999 | Assigned | WESTEL, INC. - TX | 7399 | SPLENDORA | TX |
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.