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 623
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 |
|---|---|---|---|---|---|---|---|
| 2022-11-01 | 623-320-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2022-11-01 | 623-320-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2022-03-23 | 623-284-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2022-03-23 | 623-284-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2021-10-04 | 623-278-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2020-12-18 | 623-269-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2020-12-18 | 623-269-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2020-01-22 | 623-253-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2019-07-01 | 623-259-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PHOENIX | AZ |
| 2018-06-15 | 623-440-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | PHOENIX | 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.