NumberResearchThousands-blocks in 661-593
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 661-593 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 661 blocks
Most active assignees, all time — NPA 661
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 |
|---|---|---|---|---|---|---|---|
| 2016-08-03 | 661-593-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCA NHCS | CA |
| 2026-03-23 | 661-593-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SNCA NHCS | CA |
| 2016-12-07 | 661-593-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2017-03-24 | 661-593-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNCA NHCS | CA |
| 2017-05-15 | 661-593-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SNCA NHCS | CA |
| 2017-05-22 | 661-593-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | SNCA NHCS | CA |
| 2019-04-29 | 661-593-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | SNCA NHCS | CA |
| 2016-08-02 | 661-593-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNCA NHCS | CA |
| 2016-11-30 | 661-593-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
| 2016-07-15 | 661-593-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNCA NHCS | CA |
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.