NumberResearchThousands-blocks in 573-899
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 573-899 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 573 blocks
Most active assignees, all time — NPA 573
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 |
|---|---|---|---|---|---|---|---|
| 2019-11-05 | 573-899-0XXX | 0000–0999 | Assigned | FIDELITY CABLEVISION, LLC | 3356 | ST JAMES | MO |
| 2023-03-15 | 573-899-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | ST JAMES | MO |
| — | 573-899-2XXX | 2000–2999 | Reserved | FIDELITY CABLEVISION, LLC | 3356 | ST JAMES | MO |
| 2021-04-14 | 573-899-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | ST JAMES | MO |
| 2020-07-15 | 573-899-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ST JAMES | MO |
| 2021-02-08 | 573-899-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MO | 093F | ST JAMES | MO |
| 2020-02-04 | 573-899-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 6123 | ST JAMES | MO |
| 2003-12-05 | 573-899-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MO | 993E | ST JAMES | MO |
| 2019-11-11 | 573-899-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MO | 993E | ST JAMES | MO |
| 2017-11-15 | 573-899-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MO | 093F | ST JAMES | MO |
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.